Tootfinder

Estimating the lateral speed of a fast shock driven by a coronal mass ejection at the location of solar radio emissions
S. Normo, D. E. Morosan, E. K. J. Kilpua, J. Pomoell
https://arxiv.org/abs/2404.06102

Estimating the lateral speed of a fast shock driven by a coronal mass ejection at the location of solar radio emissions
Fast coronal mass ejections (CMEs) can drive shock waves capable of accelerating electrons to high energies. These shock-accelerated electrons act as sources of electromagnetic radiation, often in the form of solar radio bursts. Recent findings suggest that radio imaging of solar radio bursts can provide a means to estimate the lateral expansion of CMEs and associated shocks in the low corona. Our aim is to estimate the expansion speed of a CME-driven shock at the locations of radio emission us…

Bell Instability-Mediated Diffusive Shock Acceleration at Supernova Blast Wave Shock Propagating in the ISM
Tsuyoshi Inoue, Alexandre Marcowith, Gwenael Giacinti
https://arxiv.org/abs/2404.03903

Bell Instability-Mediated Diffusive Shock Acceleration at Supernova Blast Wave Shock Propagating in the ISM
Supernova blast wave shock is a very important site of cosmic-ray acceleration. However, the detailed physical process of acceleration, in particular, non-linear interplay between cosmic-ray streaming and magnetic field amplification has not been studied under a realistic environment. In this paper, using a unique and novel numerical method, we study cosmic-ray acceleration at supernova blast wave shock propagating in the interstellar medium with well-resolved magnetic field amplification by no…

The Mummies - “Party At Steve’s” (1994)
I’ll never forget my shock and surprise the first time I saw the house used on the cover of this album.
We had just moved to Fremont, CA, an extremely bland and boring suburb (kind of our kink, if you will) and about two blocks away from our apartment was this old abandoned house on the corner of Fremont Blvd and Decoto Rd. One of those lots you knew would soon be razed to make room for a strip mall or maybe apartments.
I immediat…

'Catastrophic,' 'a shock': Arizona's abortion ruling threatens to upend 2024 races (Washington Post)
https://www.washingtonpost.com/elections/2024/04/10/arizona-abortion-ban-politics-election/
http://www.memeorandum.com/240410/p27#a240410p27

Chondrule Destruction via Dust Collisions in Shock Waves
Yuji Matsumoto, Kosuke Kurosawa, Sota Arakawa
https://arxiv.org/abs/2404.05954 https://

Chondrule Destruction via Dust Collisions in Shock Waves
A leading candidate for the heating source of chondrules and igneous rims is shock waves. This mechanism generates high relative velocities between chondrules and dust particles. We have investigated the possibility of the chondrule destruction in collisions with dust particles behind a shock wave using a semianalytical treatment. We find that the chondrules are destroyed during melting in collisions. We derive the conditions for the destruction of chondrules and show that the typical size of t…

Shock wave generation and propagation in dissipative and nonlocal nonlinear Rydberg media
Lu Qin, Chao Hang, Guoxiang Huang, Weibin Li
https://arxiv.org/abs/2404.06183

Shock wave generation and propagation in dissipative and nonlocal nonlinear Rydberg media
We investigate the generation of optical shock waves in strongly interacting Rydberg atomic gases with a spatially homogeneous dissipative potential. The Rydberg atom interaction induces an optical nonlocal nonlinarity. We focus on local nonlinear ($R_b\ll R_0$) and nonlocal nonlinear ($R_b\sim R_0$) regimes, where $R_b$ and $R_0$ are the characteristic length of the Rydberg nonlinearity and beam width, respectively. In the local regime, we show spatial width and contrast of the shock wave chan…

Actual child marriage is really quite rare. Sometimes media outlets skew the figures to get shock value for their headline. Like they count 16 and 17 year olds as children and they account for like 98% of all the "child" brides.

Particle Acceleration and Nonthermal Emission at the Intrabinary Shock of Spider Pulsars. I: Non-Radiative Simulations
Jorge Cort\'es, Lorenzo Sironi
https://arxiv.org/abs/2404.03700

Particle Acceleration and Nonthermal Emission at the Intrabinary Shock of Spider Pulsars. I: Non-Radiative Simulations
Spider pulsars are compact binary systems composed of a millisecond pulsar and a low-mass companion. Their X-ray emission - modulated on the orbital period - is interpreted as synchrotron radiation from high-energy electrons accelerated at the intrabinary shock. We perform global two-dimensional particle-in-cell simulations of the intrabinary shock, assuming that the shock wraps around the companion star. When the pulsar spin axis is nearly aligned with the orbital angular momentum, we find tha…

Chondrule Destruction via Dust Collisions in Shock Waves
Yuji Matsumoto, Kosuke Kurosawa, Sota Arakawa
https://arxiv.org/abs/2404.05954 https://

Chondrule Destruction via Dust Collisions in Shock Waves
A leading candidate for the heating source of chondrules and igneous rims is shock waves. This mechanism generates high relative velocities between chondrules and dust particles. We have investigated the possibility of the chondrule destruction in collisions with dust particles behind a shock wave using a semianalytical treatment. We find that the chondrules are destroyed during melting in collisions. We derive the conditions for the destruction of chondrules and show that the typical size of t…

‘Shock therapy:’ Foreigners take war tours in Ukraine to see scars of Russia's invasion: https://benborges.xyz/2024/02/29/shock-therapy-foreigners.html

This https://arxiv.org/abs/2312.12577 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csCE_…

An integrated EOS, pore-crush, strength and damage model framework for near-field ground-shock
An integrated Equation of State (EOS) and strength/pore-crush/damage model framework is provided for modeling near to source (near-field) ground-shock response, where large deformations and pressures necessitate coupling EOS with pressure-dependent plastic yield and damage. Nonlinear pressure-dependence of strength up to high-pressures is combined with a Modified Cam-Clay-like cap-plasticity model in a way to allow degradation of strength from pore-crush damage, what we call the "Yp-Cap" model.…

First direct observations of interplanetary shock impact angle effects on actual geomagnetically induced currents: The case of the Finnish natural gas pipeline system
Denny M. Oliveira, Eftyhia Zesta, Sergio Vidal-Luengo
https://arxiv.org/abs/2405.04647

First direct observations of interplanetary shock impact angle effects on actual geomagnetically induced currents: The case of the Finnish natural gas pipeline system
The impact of interplanetary (IP) shocks on the Earth's magnetosphere can greatly disturb the geomagnetic field and electric currents in the magnetosphere-ionosphere system. At high latitudes, the current systems most affected by the shocks are the auroral electrojet currents. These currents then generate ground geomagnetically induced currents (GICs) that couple with and are highly detrimental to ground artificial conductors including power transmission lines, oil/gas pipelines, railways, and …

This https://arxiv.org/abs/2404.02998 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_nli…

Dispersive shock waves in a one-dimensional droplet environment
We demonstrate the controllable generation of distinct types of dispersive shock-waves emerging in a quantum droplet bearing environment with the aid of step-like initial conditions. Dispersive regularization of the ensuing hydrodynamic singularities occurs due to the competition between meanfield repulsion and attractive quantum fluctuations. This interplay delineates the dominance of defocusing (hyperbolic) and focusing (elliptic) hydrodynamic phenomena respectively being designated by real a…

Can DC Reporters Overcome Their Trumper Shock-Training? https://talkingpointsmemo.com/edblog/can-dc-reporters-overcome-their-trumper-shock-training

Can DC Reporters Overcome Their Trumper Shock-Training?
As I noted yesterday, the Alexander Smirnov news is either confirmation of what we already knew or else spurs a kind of mass outburst of incredulity about how it is we're still as a country…

Influence of Polymer on Shock-Induced Pore Collapse: Hotspot Criticality through Reactive Molecular Dynamics
Jalen Macatangay, Chunyu Li, Alejandro Strachan
https://arxiv.org/abs/2405.02234

Influence of Polymer on Shock-Induced Pore Collapse: Hotspot Criticality through Reactive Molecular Dynamics
The shock initiation of energetic materials is mediated by the localization of mechanical energy into hotspots. These originate through the interaction of the shock and material microstructure; the most potent hotspots are formed by the collapse of porosity. Recent work using molecular dynamics (MD) has shed light on the molecular mechanisms responsible for the shock-to-deflagration transition following pore collapse in pure energetic materials. However, explosive formulations are composites of…

This https://arxiv.org/abs/2112.14097 has been replaced.
link: https://scholar.google.com/scholar?q=a

Environmental migration? An overview of the literature
The literature on the relationship between environmental factors such as climatic changes and natural hazards and human mobility (both internal and international) is characterized by heterogeneous results: some contributions highlight the role of climate changes as a driver of migratory flows, while others underline how this impact is mediated by geographical, economic and the features of the environmental shock. This paper attempts to map this literature, focusing on economics and empirical es…

Leo Varadkar to announce he will stand down as Taoiseach and Fine Gael leader
https://www.irishtimes.com/politics/2024/03/20/leo-varadkar-poised-to-make-shock-announcement-on-government/
Wonder what prom…

Leo Varadkar to announce he will stand down as Taoiseach and Fine Gael leader
Fine Gael leader makes shock announcement following Cabinet meeting

A review on two types of sonic interfaces
Myoungjean Bae
https://arxiv.org/abs/2405.05717 https://arxiv.org/pdf/2405.05717

A review on two types of sonic interfaces
In this paper, two examples of sonic interfaces are presented. The first example shows the case of sonic interfaces as weak discontinuities in self-similar shock configurations of unsteady Euler system. The second example shows the case of sonic interfaces as regular interfaces in accelerating transonic flows governed by the steady Euler-Poisson system with self-generated electric forces. And, we discuss analytic differences of the two examples, and introduce an open problem on decelerating tra…

honeymoon phase, culture shock phase, adjustment/settlement phase, mastery phase
foreign concepts like "rent"
socioeconomic drop (like being a doctor before fleeing)

There are four players who are wearing dog shock collars. 🤨 #CypherCon

My latest, a post on Roxy, a great cat.
https://varnelis.net/roxy-a-small-life/

Roxy, a small life
Our cat Roxy passed away three weeks ago, early on Sunday, April 14. She had been ill for a while, but it was still a shock. Three of us were in Tokyo while our daughter Viltis was at Bard College, studying. We had put Roxy in the care of a wonderful veterinary nurse who works ... Read more

This https://arxiv.org/abs/2311.05883 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_eco…

Time-Varying Identification of Monetary Policy Shocks
We propose a new Bayesian heteroskedastic Markov-switching structural vector autoregression with data-driven time-varying identification. The model selects alternative exclusion restrictions over time and, as a condition for the search, allows to verify identification through heteroskedasticity within each regime. Based on four alternative monetary policy rules, we show that a monthly six-variable system supports time variation in US monetary policy shock identification. In the sample-dominatin…

Deciphering Radio Emissions from Accretion Disk Winds in Radio-Quiet Active Galactic Nuclei
Tomoya Yamada, Nobuyuki Sakai, Yoshiyuki Inoue, Tomonari Michiyama
https://arxiv.org/abs/2404.04632

Deciphering Radio Emissions from Accretion Disk Winds in Radio-Quiet Active Galactic Nuclei
Unraveling the origins of radio emissions from radio-quiet active galactic nuclei (RQ AGNs) remains a pivotal challenge in astrophysics. One potential source of this radiation is the shock interaction between AGN disk winds and the interstellar medium (ISM). To understand this phenomenon, we construct a spherical, one-zone, and self-similar expansion model of shock structure between ultra-fast outflows (UFOs) and the ISM. We then calculate the energy density distribution of non-thermal electron…

Physical Properties of the Southwest Outflow Streamer in the Starburst Galaxy NGC 253 with ALCHEMI
Min Bao, Nanase Harada, Kotaro Kohno, Yuki Yoshimura, Fumi Egusa, Yuri Nishimura, Kunihiko Tanaka, Kouichiro Nakanishi, Sergio Mart\'in, Jeffrey G. Mangum, Kazushi Sakamoto, S\'ebastien Muller, Mathilde Bouvier, Laura Colzi, Kimberly L. Emig, David S. Meier, Christian Henkel, Pedro Humire, Ko-Yun Huang, V\'ictor M. Rivilla, Paul van der Werf, Serena Viti

Physical Properties of the Southwest Outflow Streamer in the Starburst Galaxy NGC 253 with ALCHEMI
The physical properties of galactic molecular outflows are important as they could constrain outflow formation mechanisms. We study the properties of the southwest (SW) outflow streamer including gas kinematics, optical depth, dense gas fraction, and shock strength in the central molecular zone of the starburst galaxy NGC 253. We image the molecular emission at a spatial resolution of $\sim$27 pc based on data from the ALCHEMI program. We trace the kinematics of molecular gas with CO(1-0) line.…

Radiation and Heat Transport in Divergent Shock-Bubble Interactions
Kelin Kurzer-Ogul, Brian M. Haines, David S. Montgomery, Silvia Pandolfi, Joshua P. Sauppe, Andrew F. T. Leong, Daniel Hodge, Pawel M. Kozlowski, Stefano Marchesini, Eric Cunningham, Eric Galtier, Dimitri Khaghani, Hae Ja Lee, Bob Nagler, Richard L. Sandberg, Arianna E. Gleason, Hussein Aluie, Jessica K. Shang

Radiation and Heat Transport in Divergent Shock-Bubble Interactions
Shock-bubble interactions (SBI) are important across a wide range of physical systems. In inertial confinement fusion, interactions between laser-driven shocks and micro-voids in both ablators and foam targets generate instabilities that are a major obstacle in achieving ignition. Experiments imaging the collapse of such voids at high energy densities (HED) are constrained by spatial and temporal resolution, making simulations a vital tool in understanding these systems. In this study, we bench…

🇨🇳 China’s Economy Dodged Neoliberal Shock Therapy — and Boomed
#china

China’s Economy Dodged Neoliberal Shock Therapy — and Boomed
In the 1980s, as China sought to introduce markets into its economy, an internal debate roiled over whether to liberalize prices gradually or all at once. It rejected the free-market shock therapy option, and challenged neoliberal orthodoxy in the process.

Not a draft shock? 3 teams tried trading into top 10 for Michael Penix Jr. before Falcons took QB, per report

https://www.cbssports.com/nfl/new…

Not a draft shock? 3 teams tried trading into top 10 for Michael Penix Jr. before Falcons took QB, per report
Atlanta wasn't the only team high on Penix

Seeds and Sequences of Element Abundances in Solar Energetic Particle Events
Donald V. Reames
https://arxiv.org/abs/2404.05048 https://

Seeds and Sequences of Element Abundances in Solar Energetic Particle Events
Solar energetic particles (SEPs) in the small "impulsive" events, primarily accelerated during magnetic reconnection in solar jets, have strong enhancements of the abundances of increasingly heavy elements. In contrast, the shock acceleration of ambient coronal plasma in most large "gradual" SEP events produces flat or decreasing abundances vs. element mass-to-charge ratios A/Q. However, heavy-ion enhancements in the largest gradual SEP events can occur in two ways: (1) strong streaming of prot…

Dear New York Times et al,
“We now see that almost all of 2023 was dominated by a legal/political story that was not only bogus but — according to prosecutors’ filings and the discredited source’s own admission to federal authorities — was a plant by the Russian intelligence services. That’s real. That requires an explanation as to how that was ever allowed to happen. It requires some effort to prevent it from happening again.”

Can DC Reporters Overcome Their Trumper Shock-Training?
As I noted yesterday, the Alexander Smirnov news is either confirmation of what we already knew or else spurs a kind of mass outburst of incredulity about how it is we're still as a country…

Oh dear. The house feels dreadfully empty. MrMaxi has gone off to puppy training boot camp for a week.
Given his usual lifestyle it’s going to be a bit of a shock for him I suspect.

'A reviewer for the newspaper The Telegram was equally effusive, writing: “Nearly 40 years have passed since Hancock released Future Shock, an album many consider a vital ancestor of hip-hop, and yet his music — rich, layered and transportive — sounded as timeless as ever.”
Now, at 84, Hancock shows no signs of slowing down, a point bolstered by the fact that his busy schedule now requires two managers to maintain.' ->
Future Shock (1983) by Herbie Hancock

Future Shock by Herbie Hancock
Listen to "Future Shock" by Herbie Hancock on any music platform - Free smart music links by Songwhip

Shock, anger, confusion grip #Alabama after court ruling on #embryos - The Washington Post
[Article unpaywalled via my sub]
https://wapo.st/48…

Shock, anger, confusion grip Alabama after court ruling on embryos
Throughout Alabama, there is widespread shock, anger and confusion over how to proceed after the state Supreme Court has ruled that frozen embryos are people.

Lawyer who negotiated Stormy Daniels deal seemed shocked Trump won
As Donald Trump’s presidential victory became clearer and clearer on election night in 2016,
an attorney who brokered hush-money payments to bury the then candidate’s alleged sexual liaisons
seemed shocked that his efforts had worked,
texting his longtime confidant:
🔥“What have we done?”🔥
So went the second day of testimony from

🎾 @… #Tennis
Katie Boulter, the biggest shock winner of a sporting championship from Leicester since Leicester City won the EPL in 2016.
A double victory this week for the Boulter-De Minaur partnership.

Influence of Polymer on Shock-Induced Pore Collapse: Hotspot Criticality through Reactive Molecular Dynamics
Jalen Macatangay, Chunyu Li, Alejandro Strachan
https://arxiv.org/abs/2405.02234

Influence of Polymer on Shock-Induced Pore Collapse: Hotspot Criticality through Reactive Molecular Dynamics
The shock initiation of energetic materials is mediated by the localization of mechanical energy into hotspots. These originate through the interaction of the shock and material microstructure; the most potent hotspots are formed by the collapse of porosity. Recent work using molecular dynamics (MD) has shed light on the molecular mechanisms responsible for the shock-to-deflagration transition following pore collapse in pure energetic materials. However, explosive formulations are composites of…

Listening to my #Vinyl #Collection - Album 180
#PeterGabriel – Security (1982)
A diverse, tribal, textured album. Shock the Monkey is a standout, but the entire album has an e…

Block Spectral Stresses (BSS) estimation for shock-capturing and turbulent modeling
Matteo Ruggeri, Victor C. B. Sousa, Carlo Scalo
https://arxiv.org/abs/2402.19354

Block Spectral Stresses (BSS) estimation for shock-capturing and turbulent modeling
A new combined sub-filter scale turbulence and shock-capturing model is developed for high-order finite volume numerics, extending previous work to unstructured solvers. Block Spectral Stresses (BSS) method relies on the spectra of the velocity gradients to estimate the subfilter scale stresses, heat-flux, and pressure-work based on the resolved field. The method is able to capture shocks with numerical order up to 25 and in a shock-vortex interaction simulation is able to capture the shock and…

Adjoint-based goal-oriented implicit shock tracking using full space mesh optimization
Pranshul Thakur, Siva Nadarajah
https://arxiv.org/abs/2405.00904 htt…

Adjoint-based goal-oriented implicit shock tracking using full space mesh optimization
Solutions to the governing partial differential equations obtained from a discrete numerical scheme can have significant errors, especially near shocks when the discrete representation of the solution cannot fully capture the discontinuity in the solution. A recent approach to shock tracking [1, 2] has been to implicitly align the faces of mesh elements with the shock, yielding accurate solutions on coarse meshes. In engineering applications, the solution field is often used to evaluate a scala…

Leo Varadkar to announce he will stand down as Taoiseach and Fine Gael leader
https://www.irishtimes.com/politics/2024/03/20/leo-varadkar-poised-to-make-shock-announcement-on-government/
Wonder what prom…

Leo Varadkar to announce he will stand down as Taoiseach and Fine Gael leader
Fine Gael leader makes shock announcement following Cabinet meeting

Who's better for the economy? (The answer won't shock you.)
https://youtu.be/oEMn40L5UN4

Revealing the variation mechanism of ON 231 via the two-components shock-in-jet model
Chi-Zhuo Wang, Yun-Guo Jiang
https://arxiv.org/abs/2403.04518 https:/…

Revealing the variation mechanism of ON 231 via the two-components shock-in-jet model
The variation mechanism of blazars is a long-standing unresolved problem. In this work, we present a scenario to explain diverse variation phenomena for ON 231, where the jet emissions are composed of the flaring and the less variable components (most probably from the post-flaring blobs), and the variation is dominated by shock-in-jet instead of the Doppler effect. We perform correlation analysis for the multiwavelength light curves and find no significant correlations. For optical band, ON 23…

honeymoon phase, culture shock phase, adjustment/settlement phase, mastery phase
foreign concepts like "rent"
socioeconomic drop (like being a doctor before fleeing)

Seeing multiple people pointing in shock at the “Morris II” so-called “AI Worm”
It seems that only I remember Swen.
#spam #malware #infosec

There are four players who are wearing dog shock collars. 🤨 #CypherCon

This won’t happen, but it’s fun to imagine how things would be if it did… https://apple.news/AnOqfD4CSTuSCOXhA9CeA2Q

7-round mock draft: Cowboys shock fans with unexpected 1st-round pick https://cowboyswire.usatoday.com/lists/7-round-mock-draft-cowboys-shock-fans-with-unexpected-1st-round-pick/

7-round mock draft: Cowboys shock fans with unexpected 1st-round pick
There’s a consensus of what the Dallas Cowboys are going to focus on in the upcoming NFL draft. After an offseason where they’ve done nothing according to script, why is everyone assumi…

This is straight up BS. "Public Safety risk" 🤮 🤮 😤
"Mosaic Forest Management says trees came down due to public safety risk"
They logged it because they can.! Likely also because they are readying to sell the land to limit their own liability because it is adjacent to a popular trail and nature spot on the river called "The Hole in the Wall"
#PortAlberni

Can DC Reporters Overcome Their Trumper Shock-Training? (Talking Points Memo)
https://talkingpointsmemo.com/edblog/can-dc-reporters-overcome-their-trumper-shock-training/sharetoken/KGBJRFFolANQ
http://www.memeorandum.com/240222/p95#a240222p95

Shaven Worm Orchestra
"Wormy Razor"
#alternative

#Lotus club track day coming up on Easter Sunday at Sonoma. Last time out at the track I overheated my brakes so this week I’ve bought some new tools, changed brake pads (to EBC Yellow stuff), changed brake fluid, swapped worn front discs with fresher rear discs, and bought new stickier tires. Aching a bit, but happy that it went well. Now I need to dodge the showers to bed the new pads in.

@… @… @… understood, I recently switch from Apple Watch to Casio G-Shock (

Does he *really* 'shock' though? Does *anything* this narcissistic, amoral, abrasive con-man does actually shock anyone at all, at this point?
https://www.rawstory.com/trump-bible/

'Insane levels of sacrilege': Trump shocks by hawking $60 MAGA Bibles
Social media users were shocked and appalled that Donald Trump was hawking patriotic-themed Bibles named after country singer Lee Greenwood.The former president started off Holy Week by sharing a supporter's post comparing his criminal civil travails to Christ's crucifixion and he followed up Tuesda...

The nature of the X-ray filaments around bow shock pulsar wind nebulae
Barbara Olmi, Elena Amato, Rino Bandiera, Pasquale Blasi
https://arxiv.org/abs/2403.03616

The nature of the X-ray filaments around bow shock pulsar wind nebulae
Context. We propose that the X-ray filaments emerging from selected bow shock pulsar wind nebulae are due to a charge-separated outflow of electrons and/or positrons escaping the nebula and propagating along the local Galactic magnetic field. Aims. The X-ray brightness, length, and thickness of filaments are all accounted for if a nonresonant streaming instability is excited. Methods. This is possible if particles are released in the interstellar medium as a collimated beam, as would be expecte…

Protests grow in Argentina against its right-wing leader's economic 'shock therapy' : NPR
https://www.npr.org/2024/04/13/1244583115/protests-grow-in-argentina-against-its-right-wing-leaders-econ…

My beloved G-SHOCK GBD-200 suddenly considers appropiate to stop my workout a couple kilometers after it starts. How good I still use Strava anyway to track the full workout.

This https://arxiv.org/abs/2306.04500 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_nuc…

Structure Factors for Hot Neutron Matter from Ab Initio Lattice Simulations with High-Fidelity Chiral Interactions
We present the first ab initio lattice calculations of spin and density correlations in hot neutron matter using high-fidelity interactions at next-to-next-to-next-to-leading order (N3LO) in chiral effective field theory. These correlations have a large impact on neutrino heating and shock revival in core-collapse supernovae and are encapsulated in functions called structure factors. Unfortunately, calculations of structure factors using high- fidelity chiral interactions were well out of reach…

Cameron Jordan on Saints' three-year playoff drought: 'Maybe a culture shock needs to happen' https://www.nfl.com/news/cameron-jordan-on-saints-three-year-playoff-drought-maybe-a-culture-shock-needs-to-happen…

Cameron Jordan on Saints' three-year playoff drought: 'Maybe a culture shock needs to happen'
Following three straight postseason misses by the New Orleans Saints, longtime defensive end Cameron Jordan agrees with the front office that a culture shock might be beneficial. 

RIP Lotus Eletre.
No one in their right mind is going to spend US$110k on an Eletre when they can get a Macan 4 for $79k. Yes, the Macan is slightly smaller, but I don’t think most people will notice.
Every review of the Eletre contains complaints about the poor tuning of its steering and suspension (which comes as a shock to me, considering it wears a Lotus badge), issues that I suspect will not be present in a Porsche product. Superior handling for $30k less, and a service cent…

The 2024 Porsche Macan EV has character, pace, and the right badge
The new electric Porsche Macan starts at $78,800, deliveries begin later this year.

This https://arxiv.org/abs/2403.08875 has been replaced.
initial toot: https://mastoxiv.page/@…

Quantum fluctuating theory for one-dimensional shock waves
We study the formation and the subsequent dynamics of shock waves in repulsive one-dimensional Bose gases during the free expansion of a density hump. By building coherent Fermi states for interacting Bethe fermions, we define a quantum fluctuating initial state expressed in terms of universal quantities, namely the density and the Luttinger parameter. In the integrable case, this fluctuating state is then evolved by generalized hydrodynamics (GHD) and, differently from non-fluctuating initial …

On the extinction of multiple shocks in scalar viscous conservation laws
Jeanne Lin, Dmitry E. Pelinovsky, Bjorn de Rijk
https://arxiv.org/abs/2403.04628 h…

On the extinction of multiple shocks in scalar viscous conservation laws
We are interested in the dynamics of interfaces, or zeros, of shock waves in general scalar viscous conservation laws with a locally Lipschitz continuous flux function, such as the modular Burgers' equation. We prove that all interfaces coalesce within finite time, leaving behind either a single interface or no interface at all. Our proof relies on mass and energy estimates, regularization of the flux function, and an application of the Sturm theorems on the number of zeros of solutions of para…

Seeing multiple people pointing in shock at the “Morris II” so-called “AI Worm”
It seems that only I remember Swen.
#spam #malware #infosec

High-fidelity simulations of microramp-controlled shock wave/boundary layer interaction
Giacomo Della Posta, Emanuele Martelli, Francesco Salvadore, Matteo Bernardini
https://arxiv.org/abs/2402.18971

High-fidelity simulations of microramp-controlled shock wave/boundary layer interaction
Microvortex generators (MVGs) are a promising solution to control shock wave/turbulent boundary layer interactions (SBLIs). This study examines the effects of a microramp VG on an SBLI generated by an oblique shock wave and a turbulent boundary layer using direct numerical simulations (DNSs). Two cases, with and without MVGs, are compared at free-stream Mach number equal to 2 and friction Reynolds number equal to 600. A long integration period allows assessing how MVGs affect the typical SBLI l…

Can DC Reporters Overcome Their Trumper Shock-Training? (Talking Points Memo)
https://talkingpointsmemo.com/edblog/can-dc-reporters-overcome-their-trumper-shock-training/sharetoken/KGBJRFFolANQ
http://www.memeorandum.com/240222/p95#a240222p95

A characteristics-based method for shock-ramp data analysis
Jingxiang Shen, Wei Kang
https://arxiv.org/abs/2403.13380 https://arxiv.o…

A characteristics-based method for shock-ramp data analysis
For the data analysis problem of shock-ramp compression, i.e., ramp compression after a relatively strong initial shock, a characteristics-based method that strictly deals with the initial hydrodynamic shock is described in detail. Validation of this analysis method using simulated shock-ramp data generated by molecular dynamics and one-dimensional radiation hydrodynamic code is also presented.

Dispersive shock waves in a one-dimensional droplet environment
Sathyanarayanan Chandramouli, Simeon I. Mistakidis, Garyfallia C. Katsimiga, Panayotis G. Kevrekidis
https://arxiv.org/abs/2404.02998

Dispersive shock waves in a one-dimensional droplet environment
We demonstrate the controllable generation of distinct types of dispersive shock-waves emerging in a quantum droplet bearing environment with the aid of step-like initial conditions. Dispersive regularization of the ensuing hydrodynamic singularities occurs due to the competition between meanfield repulsion and attractive quantum fluctuations. This interplay delineates the dominance of defocusing (hyperbolic) and focusing (elliptic) hydrodynamic phenomena respectively being designated by real a…

Observation of a Fully-formed Forward--Reverse Shock Pair Due to the Interaction Between Two Coronal Mass Ejections at 0.5 au
D. Trotta, A. Dimmock, X. Blanco-Cano, R. Forsyth, H. Hietala, N. Fargette, A. Larosa, N. Lugaz, E. Palmerio, S. W. Good, E. K. J. Kilpua, E. Yordanova, O. Pezzi, G. Nicolaou, T. S. Horbury, R. Vainio, N. Dresing, C. J. Owen, R. Wimmer-Schweingruber
…

Observation of a Fully-formed Forward--Reverse Shock Pair Due to the Interaction Between Two Coronal Mass Ejections at 0.5 au
We report direct observations of a fast magnetosonic forward--reverse shock pair observed by Solar Orbiter on March 8, 2022 at the short heliocentric distance of 0.5 au. The structure, sharing some features with fully-formed stream interaction regions (SIRs), is due to the interaction between two successive coronal mass ejections (CMEs), never previously observed to give rise to a forward--reverse shock pair. The scenario is supported by remote observations from the STEREO-A coronographs, where…

Beyond shock and awe: Inside Trump's potential second-term agenda - POLITICO https://www.politico.com/news/2024/02/25/second-trump-term-00140488

10 ways a second Trump term could be more extreme than the first
From nationwide abortion bans to classroom culture wars, assaults on climate science and political weaponization of the military, his return to the White House could make Trump 1.0 seem tame.

Extrapolated Shock Tracking: Bridging shock-fitting and embedded boundary methods
Mirco Ciallella, Mario Ricchiuto, Renato Paciorri, Aldo Bonfiglioli
https://arxiv.org/abs/2402.13681

Extrapolated Shock Tracking: Bridging shock-fitting and embedded boundary methods
We propose a novel approach to approximate numerically shock waves. The method combines the unstructured shock-fitting approach developed in the last decade by some of the authors, with ideas coming from embedded boundary techniques. The numerical method obtained allows avoiding the re-meshing phase required by the unstructured fitting method, while guaranteeing accuracy properties very close to those of the fitting approach. This new method has many similarities with front tracking approaches,…

Giant Biconical Dust Filaments in the Starburst Galaxy NGC 1808
Rohan KaneUniversity of Maryland, College Park, Sylvain VeilleuxUniversity of Maryland, College Park
https://arxiv.org/abs/2403.02427 https://arxiv.org/pdf/2403.02427
arXiv:2403.02427v1 Announce Type: new
Abstract: We present the results from an analysis of multi-wavelength archival data on the multi-phase outflow in the starburst galaxy NGC 1808. We report the detection at 70 and 100 um of dust filaments that extend up to ~ 13 kpc from the galactic mid-plane and trace an edge-brightened biconical structure along the minor axis of the galaxy. The inner filaments are roughly co-spatial with previously identified optical dust filaments, extraplanar polycyclic aromatic hydrocarbon emission, and neutral and ionized gaseous outflows. The 70/160 um flux ratio, a proxy for dust temperature, is elevated along the edges of the cones, indicating that the dusty medium has been driven out of the central regions of these cones and possibly shock-heated by an outflow. We establish lower limits on the extraplanar dust mass and mean height above the stellar disk of log(M_d/M_sun) = 6.48 and |z| ~ 5 kpc, respectively. The energy requirement of (5.1-9.6) x 10^{56} ergs needed to lift the dusty material, assuming Milky-Way like dust-to-gas ratio, can be supplied by the current starburst, with measured star formation rate of 3.5-5.4 M_sun yr^{-1}, over a timescale of (4-26) xi^{-1} Myr, where xi is the efficiency of energy transfer. We conclude that a starburst-driven outflow is the most likely mechanism by which the dust features were formed.

Mosaic Forest Management Only Has Contempt
(Background: "Logging near cemetery a 'shock' for Port Alberni residents") Dear Editor, I am not shocked. Mosaic’s (formerly Island Timberlands and Timberwest) recent logging adjacent to the cemetery and Hole in the Wall shows in the worst way that it respects the dead as much as it respects streams, watersheds, public access and amenities, wildfire risk, and wildlife habitat.

Which NFL Team Could Shock the World? https://profootballmania.com/2024/03/10/which-nfl-team-could-shock-the-world/

Which NFL Team Could Shock the World? - Pro Football Mania
Year after year, there is always one team that goes much farther than everyone expects. Take the Texans from last year as an example, they picked QB CJ Stroud 2nd overall, which turned out to be a massive success leading to a divisional round appearance. With this certain class being incredible, let’s take a look […]

A cancer diagnosis often comes with a host of difficult decisions, including what to do about the impact of treatment on a person’s fertility.
Many individuals grappling with this dual burden turn to in vitro fertilization (IVF) as a way to preserve their reproductive options.
That’s why cancer patients and oncologists are expressing shock and anxiety about the recent ruling by the Alabama Supreme Court that frozen embryos are considered children under the law.
The ruling …

Alabama embryo ruling may have devastating effect on cancer patients
Worries are mounting about the ruling’s effect on people, including many cancer patients, who say IVF may be their only way of having a family.

On the plasma quasi-thermal noise in the outer heliosphere
Nicole Meyer-Vernet, Alain Lecacheux
https://arxiv.org/abs/2404.04150 https://

On the plasma quasi-thermal noise in the outer heliosphere
The recent paper by Li et al. on electron quasi-thermal noise in the outer heliosphere is flawed. It assumes the plasma drift speed to be much smaller than the electron thermal speed, even though both quantities are of the same order of magnitude in the outer heliosphere inward of the termination shock, because of the low plasma temperature. In this case, the Langmuir wave dispersion equation and the quasi-thermal noise in the antenna frame are completely changed. Furthermore, these calculation…

Individual particle approach to the diffusive shock acceleration. Effect of the non-uniform flow velocity downstream of the shock
O. Petruk, T. Kuzyo
https://arxiv.org/abs/2404.17397

Individual particle approach to the diffusive shock acceleration. Effect of the non-uniform flow velocity downstream of the shock
The momentum distribution of particles accelerated at strong non-relativistic shocks may be influenced by the spatial distribution of the flow speed around the shock. This phenomenon becomes evident in the cosmic-ray modified shock, where the particle spectrum itself determines the flow velocity profile upstream. However, what if the flow speed is not uniform downstream as well? Hydrodynamics indicates that its spatial variation over the length scales involved in the acceleration of particles i…

This https://arxiv.org/abs/2306.04500 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_nuc…

Structure Factors for Hot Neutron Matter from Ab Initio Lattice Simulations with High-Fidelity Chiral Interactions
We present the first ab initio lattice calculations of spin and density correlations in hot neutron matter using high-fidelity interactions at next-to-next-to-next-to-leading order (N3LO) in chiral effective field theory. These correlations have a large impact on neutrino heating and shock revival in core-collapse supernovae and are encapsulated in functions called structure factors. Unfortunately, calculations of structure factors using high- fidelity chiral interactions were well out of reach…

Reverse Shock Emission in an Off-axis Top-hat Jet Model for Gamma-Ray Bursts
Sen-Lin Pang, Zi-Gao Dai
https://arxiv.org/abs/2402.17224 https://

Reverse Shock Emission in an Off-axis Top-hat Jet Model for Gamma-Ray Bursts
The afterglow of a gamma-ray burst (GRB) has been widely argued to arise from the interaction of a relativistic outflow with its ambient medium. During such an interaction, a pair of shocks are generated: a forward shock that propagates into the medium, and a reverse shock that propagates into the outflow. Extensive studies have been conducted on the emission from the forward shock viewed off-axis. Furthermore, the observation of a reverse shock in an on-axis short GRB suggests that the reverse…

Phase transitions of Fe$_2$O$_3$ under laser shock compression
A. AmourettiIMPMC, Sorbonne Universit\'e, UMR CNRS, Graduate School of Engineering, Osaka University, Japan, C. Cr\'epissonDepartment of Physics, Clarendon Laboratory, University of Oxford, Oxford, UK, S. AzadiDepartment of Physics, Clarendon Laboratory, University of Oxford, Oxford, UK, D. CabaretIMPMC, Sorbonne Universit\'e, UMR CNRS, T. CampbellDepartment of Physics, Clarendon Laboratory, University of Oxford…

Phase transitions of Fe$_2$O$_3$ under laser shock compression
We present in-situ x-ray diffraction and velocity measurements of Fe$_2$O$_3$ under laser shock compression at pressures between 38-116 GPa. None of the phases reported by static compression studies were observed. Instead, we observed an isostructural phase transition from $α$-Fe$_2$O$_3$ to a new $α^\prime$-Fe$_2$O$_3$ phase at a pressure of 50-62 GPa. The $α^\prime$-Fe$_2$O$_3$ phase differs from $α$-Fe$_2$O$_3$ by an 11% volume drop and a different unit cell compressibility. We further o…

Preconditioned iterative solvers for constrained high-order implicit shock tracking methods
Jakob Vandergrift, Matthew J. Zahr
https://arxiv.org/abs/2402.18403

Preconditioned iterative solvers for constrained high-order implicit shock tracking methods
High-order implicit shock tracking (fitting) is a class of high-order numerical methods that use numerical optimization to simultaneously compute a high-order approximation to a conservation law solution and align elements of the computational mesh with non-smooth features. This alignment ensures that non-smooth features are perfectly represented by inter-element jumps and high-order basis functions approximate smooth regions of the solution without nonlinear stabilization, which leads to accur…

Parallel numerical simulation of impact crater with perfect matched layers
Huacheng Li, Zongyu Yue, Nan Zhang, Jinhai Zhang, Zhongzheng Miao
https://arxiv.org/abs/2403.04267

Parallel numerical simulation of impact crater with perfect matched layers
Impact craters are the primary geomorphic features on the surfaces of celestial bodies such as the Moon, and their formation has significant implications for the evolutionary history of the celestial body. The study of the impact crater formation process relies mainly on numerical simulation methods, with two-dimensional simulations capable of reproducing general patterns of impact processes while conserving computational resources. However, to mitigate the artificial reflections of shock waves…

Tracking the motion of a shock along a channel in the low solar corona
J. Rigney (Dublin Institute for Advanced Studies, Armagh Observatory and Planetarium, Queen's University Belfast), P. T. Gallagher (Dublin Institute for Advanced Studies), G. Ramsay (Armagh Observatory and Planetarium), J. G. Doyle (Armagh Observatory and Planetarium), D. M. Long (4 and3), O. Stepanyuk (Institute of Astronomy Bulgaria), K. Kozarev (Institute of Astronomy Bulgaria)

Tracking the motion of a shock along a channel in the low solar corona
Shock waves are excited by coronal mass ejections (CMEs) and large-scale extreme-ultraviolet (EUV) wave fronts and can result in low-frequency radio emission under certain coronal conditions. In this work, we investigate a moving source of low-frequency radio emission as a CME and an associated EUV wave front move along a channel of a lower density, magnetic field, and Alfvén speed in the solar corona. Observations from the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory, …

There once was a time when Republicans stood steadfast against Russian abuse of human rights, but that abiding party principle has gone the way of the videocassette.
To the shock of absolutely nobody, the GOP presidential candidate broke his 72-hour silence about the murder of Russian dissident Alexei Navalny by puking this babble on social media:

“The sudden death of Alexei Navalny has made me more and more aware of what is happening in our Country. It is a slow, steady progression, …

Galaxy cluster virial-shock sources in eROSITA catalogs
Gideon Ilani, Kuan-Chou Hou, Gil Nadler, Uri Keshet
https://arxiv.org/abs/2402.17822 https://

Galaxy cluster virial-shock sources in eROSITA catalogs
Following the recent identification of discrete ROSAT and radio sources associated with the virial shocks of MCXC clusters and groups, we examine if the early eROSITA-DE data release (EDR) shows virial-shock X-ray sources within its $140$ deg$^2$ field. EDR catalog sources are stacked and radially binned around EDR catalog clusters and groups. The properties of the excess virial-shock sources are inferred statistically by comparing the virial-shock region to the field. An excess of X-ray source…

Modal analysis of the triadic interactions in the dynamics of a transitional shock wave boundary layer interaction
Isma\"il Ben Hassan Sa\"idi, St\'ephane Wang, Guillaume Fournier, Christian Tenaud, Jean-Christophe Robinet
https://arxiv.org/abs/2403.13963

Modal analysis of the triadic interactions in the dynamics of a transitional shock wave boundary layer interaction
This work is a numerical study of a transitional shock wave boundary layer interaction (SWBLI). The main goal is to improve our understanding of the well known low-frequency SWBLI unsteadiness and especially the suspected role of triadic interactions in the underlying physical mechanism. To this end, a Direct Numerical Simulation (DNS) is performed using high-order finite volume scheme equipped with a suitable shock capture procedure. The resulting database is then extensively post-processed in…

Preconditioned iterative solvers for constrained high-order implicit shock tracking methods
Jakob Vandergrift, Matthew J. Zahr
https://arxiv.org/abs/2402.18403

Preconditioned iterative solvers for constrained high-order implicit shock tracking methods
High-order implicit shock tracking (fitting) is a class of high-order numerical methods that use numerical optimization to simultaneously compute a high-order approximation to a conservation law solution and align elements of the computational mesh with non-smooth features. This alignment ensures that non-smooth features are perfectly represented by inter-element jumps and high-order basis functions approximate smooth regions of the solution without nonlinear stabilization, which leads to accur…

Study of mass outflow rates from magnetized advective accretion disk around rotating black holes
Camelia Jana (IIT Guwahati), Santabrata Das (IIT Guwahati)
https://arxiv.org/abs/2404.04043

Study of mass outflow rates from magnetized advective accretion disk around rotating black holes
We develop and discuss a model formalism to study the properties of mass outflows that are emerged out from a relativistic, magnetized, viscous, advective accretion flow around a rotating black hole. In doing so, we consider the toroidal component as the dominant magnetic fields and synchrotron process is the dominant cooling mechanism inside the accretion disk. With this, we self-consistently solve the coupled accretion-ejection governing equations in the steady state and obtain the shock-indu…

Forecasting SEP Events During Solar Cycles 23 and 24 Using Interpretable Machine Learning
Spiridon Kasapis, Irina N. Kitiashvili, Paul Kosovich, Alexander G. Kosovichev, Viacheslav M. Sadykov, Patrick O'Keefe, Vincent Wang
https://arxiv.org/abs/2403.02536

Forecasting SEP Events During Solar Cycles 23 and 24 Using Interpretable Machine Learning
Prediction of the Solar Energetic Particle (SEP) events garner increasing interest as space missions extend beyond Earth's protective magnetosphere. These events, which are, in most cases, products of magnetic reconnection-driven processes during solar flares or fast coronal-mass-ejection-driven shock waves, pose significant radiation hazards to aviation, space-based electronics, and particularly, space exploration. In this work, we utilize the recently developed dataset that combines the Solar…

Multidimensional Radiation Hydrodynamics Simulations of Supernova 1987A Shock Breakout
Wun-Yi ChenASIAA, NTU, Ke-Jung ChenASIAA, Masaomi OnoASIAA, RIKEN
https://arxiv.org/abs/2402.19005

Multidimensional Radiation Hydrodynamics Simulations of Supernova 1987A Shock Breakout
Shock breakout is the first electromagnetic signal from supernovae (SNe), which contains important information on the explosion energy and the size and chemical composition of the progenitor star. This paper presents the first two-dimensional (2D) multi-wavelength radiation hydrodynamics simulations of SN 1987A shock breakout by using the $\texttt{CASTRO}$ code with the opacity table, $\texttt{OPAL}$, considering eight photon groups from infrared to X-ray. To investigate the impact of the pre-s…

This https://arxiv.org/abs/2305.08575 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Fission and fusion of heavy nuclei induced by the passage of a radiation-mediated shock in BNS mergers
We compute the structure of a Newtonian, multi-ion radiation-mediated shock (RMS) for different compositions anticipated in various stellar explosions. We use a multifluid RMS model that incorporates electrostatic coupling between the different plasma constituents as well as Coulomb friction in a self-consistent manner, and approximates the effect of pair creation and the presence of free neutrons in the shock upstream on the shock structure. We find that under certain conditions a significant …

Cosmic-ray Acceleration in Core-Collapse Supernova Remnants with the Wind Termination Shock
Shoma F. Kamijima, Yutaka Ohira
https://arxiv.org/abs/2403.17335

Cosmic-ray Acceleration in Core-Collapse Supernova Remnants with the Wind Termination Shock
We investigate the attainable maximum energy of particles accelerated in the core-collapse supernova remnant (SNR) shock propagating in the free wind region with the Parker-spiral magnetic field, current sheet, and the wind termination shock (WTS) by using test particle simulations. This work focuses on Wolf-Rayet stars as progenitors. The magnetic field amplification in the free wind region (shock upstream region) is not considered in this work. Test particle simulations show that particles es…

Radiation-mediated shocks in GRB prompt emission
Filip Alamaa, Felix Ryde, Christoffer Lundman
https://arxiv.org/abs/2403.03529 https://

Radiation-mediated shocks in GRB prompt emission
The debate regarding the emission mechanism in gamma-ray bursts has been long-standing. Here, we study the spectral signatures of photospheric emission, accounting for subphotospheric dissipation by a radiation-mediated shock. The shocks are modeled using the Kompaneets RMS approximation (KRA). We find that the resulting observed spectra are soft, broad, and exhibit an additional break at lower energies. When fitting a collection of 150 mock data samples generated by the model, we obtain a dist…

Final Moments II: Observational Properties and Physical Modeling of CSM-Interacting Type II Supernovae
W. V. Jacobson-Gal\'an, L. Dessart, K. W. Davis, C. D. Kilpatrick, R. Margutti, R. J. Foley, R. Chornock, G. Terreran, D. Hiramatsu, M. Newsome, E. Padilla Gonzalez, C. Pellegrino, D. A. Howell, A. V. Filippenko, J. P. Anderson, C. R. Angus, K. Auchettl, K. A. Bostroem, T. G. Brink, R. Cartier, D. A. Coulter, T. de Boer, M. R. Drout, N. Earl, K. Ertini, J. R. Farah, D. Farias, C. …

Final Moments II: Observational Properties and Physical Modeling of CSM-Interacting Type II Supernovae
We present ultraviolet/optical/near-infrared observations and modeling of Type II supernovae (SNe II) whose early-time ($δt < 2$ days) spectra show transient, narrow emission lines from shock ionization of confined ($r < 10^{15}$ cm) circumstellar material (CSM). The observed electron-scattering broadened line profiles (i.e., IIn-like) of HI, He I/II, C III/IV, and N III/IV/V from the CSM persist on a characteristic timescale ($t_{\rm IIn}$) that marks a transition to a lower-density CSM and t…

Final Moments II: Observational Properties and Physical Modeling of CSM-Interacting Type II Supernovae
W. V. Jacobson-Gal\'an, L. Dessart, K. W. Davis, C. D. Kilpatrick, R. Margutti, R. J. Foley, R. Chornock, G. Terreran, D. Hiramatsu, M. Newsome, E. Padilla Gonzalez, C. Pellegrino, D. A. Howell, A. V. Filippenko, J. P. Anderson, C. R. Angus, K. Auchettl, K. A. Bostroem, T. G. Brink, R. Cartier, D. A. Coulter, T. de Boer, M. R. Drout, N. Earl, K. Ertini, J. R. Farah, D. Farias, C. …

Final Moments II: Observational Properties and Physical Modeling of CSM-Interacting Type II Supernovae
We present ultraviolet/optical/near-infrared observations and modeling of Type II supernovae (SNe II) whose early-time ($δt < 2$ days) spectra show transient, narrow emission lines from shock ionization of confined ($r < 10^{15}$ cm) circumstellar material (CSM). The observed electron-scattering broadened line profiles (i.e., IIn-like) of HI, He I/II, C III/IV, and N III/IV/V from the CSM persist on a characteristic timescale ($t_{\rm IIn}$) that marks a transition to a lower-density CSM and t…

This https://arxiv.org/abs/2303.16230 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Spin-induced offset stream self-crossing shocks in tidal disruption events
Tidal disruption events occur when a star is disrupted by a supermassive black hole, resulting in an elongated stream of gas that partly falls back to the pericenter. Due to apsidal precession, the returning stream may collide with itself, leading to a self-crossing shock that launches an outflow. If the black hole spins, this collision may additionally be affected by Lense-Thirring precession that can cause an offset between the two stream components. We study the impact of this effect on the …

This https://arxiv.org/abs/2303.16230 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Spin-induced offset stream self-crossing shocks in tidal disruption events
Tidal disruption events occur when a star is disrupted by a supermassive black hole, resulting in an elongated stream of gas that partly falls back to the pericenter. Due to apsidal precession, the returning stream may collide with itself, leading to a self-crossing shock that launches an outflow. If the black hole spins, this collision may additionally be affected by Lense-Thirring precession that can cause an offset between the two stream components. We study the impact of this effect on the …

This https://arxiv.org/abs/2312.06961 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Fast as Potoroo: Radio Continuum Detection of a Bow-Shock Pulsar Wind Nebula Powered by Pulsar J1638-4713
We report the discovery of a bow-shock pulsar wind nebula (PWN), named Potoroo, and the detection of a young pulsar J1638-4713 that powers the nebula. We present a radio continuum study of the PWN based on 20-cm observations obtained from the Australian Square Kilometre Array Pathfinder (ASKAP) and MeerKAT. PSR J1638-4713 was identified using Parkes radio telescope observations at frequencies above 3 GHz. The pulsar has the second-highest dispersion measure of all known radio pulsars (1553 pc/c…

Revisit the Emission Polarization of the Internal-shock for the blazars' Jet
Hao-Qiang Zhang, Da-Bin Lin, Kuan Liu, En-Wei Liang
https://arxiv.org/abs/2402.06898

Revisit the Emission Polarization of the Internal-shock for the blazars' Jet
Recent Imaging X-ray Polarimetry Explorer (IXPE) observations of blazars tend to support the shock model for the X-ray emission, but report a low polarization degree ($Π\sim 10\%$) in X-rays compared with the previous theoretical expectations in the shock model. In order to reconcile the theoretical expectations with observations, we revisit the polarization of the shock emission by considering different kind of direction distribution for the shock-generated magnetic fields (sgMFs). Here, $w'_…

This https://arxiv.org/abs/2402.16707 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Bondi-Hoyle-Lyttleton Accretion around the Rotating Hairy Horndeski Black Hole
We model the dynamical changes of the disk and shock cone resulting from the interaction of matter with the Horndeski black hole, at where the scalar field and spacetime has a strong interaction. The effects of the scalar hair, the black hole rotation parameter, and the impacts of the asymptotic speed have been examined, revealing the influence of these parameters on the shock cone and the trapped QPO modes within the cone. Numerical calculations have shown that the hair paramete significantly …

Relation between the keV-MeV and TeV emission of GRB 221009A and its implications
Yan-Qiu Zhang, Hao-Xiang Lin, Shao-Lin Xiong, Zhuo Li, Ming-Yu Ge, Chen-Wei Wang, Shu-Xu Yi, Zhen Zhang, Shuang-Nan Zhang, Li-Ming Song, Chao Zheng, Wang-Chen Xue, Jia-Cong Liu, Wen-Jun Tan, Yue Wang, Wen-Long Zhang
https://arxiv.org/abs/2404.03229…

Relation between the keV-MeV and TeV emission of GRB 221009A and its implications
Gamma-ray bursts (GRBs) are believed to launch relativistic jets, which generate prompt emission by their internal processes and drive external shocks into surrounding medium, accounting for the long-lasting afterglow emission. However, how the jet powers the external shock is an open question. The unprecedented observations of the keV-MeV emission with GECAM and the TeV emission with LHAASO of so far the brightest burst, GRB 221009A, offer a great opportunity to study the prompt-to-afterglow t…