Tootfinder

New lens flare collection just dropped. https://mastodon.bot/@apod/114663574093410846

Time-resolved p-mode oscillations for subgiant HD 142091 with NEID at WIYN
Jacob K. Luhn, Paul Robertson, Samuel Halverson, Arvind F. Gupta, Jared C. Siegel, Jason T. Wright, Eric B. Ford, Suvrath Mahadevan, Timothy R. Bedding, Jaime A. Alvarado-Montes, Chad F. Bender, Jiayin Dong, Fred Hearty, Sarah E. Logsdon, Andrew Monson, Michael W. McElwain, Joe P. Ninan, Jayadev Rajagopal, Arpita Roy, Christian Schwab, Gudmundur Stefansson, Daniel J. Stevens, Ryan C. Terrien, Sharon Xuesong Wang…

Time-resolved p-mode oscillations for subgiant HD 142091 with NEID at WIYN
Detections of Earth-analog planets in radial velocity observations are limited by stellar astrophysical variability occurring on a variety of timescales. Current state-of-the-art methods to disentangle potential planet signals from intrinsic stellar signals assume that stellar signals introduce asymmetries to the line profiles that can therefore be separated from the pure translational Doppler shifts of planets. Here, we examine this assumption using a time series of resolved stellar p-mode osc…

This https://arxiv.org/abs/2502.03278 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_ees…

Fault-Tolerant Control for System Availability and Continuous Operation in Heavy-Duty Wheeled Mobile Robots
When the control system in a heavy-duty wheeled mobile robot (HD-WMR) malfunctions, deviations from ideal motion occur, significantly heightening the risks of off-road instability and costly damage. To meet the demands for safety, reliability, and controllability in HD-WMRs, the control system must tolerate faults to a certain extent, ensuring continuous operation. To this end, this paper introduces a model-free hierarchical control with fault accommodation (MFHCA) framework designed to address…

Etwas kurzfristig, weil es aufgrund meiner Gesundheit bisschen Gewurschtel bei der Terminfindung gab: Heute liest @… für mich aus "Zerrissen zwischen Pflicht und Gefühl" im Rahmen von #AllabendlichQueer !
Die Daten sind wie üblich:…

Mag ik een koeling op mn foon vele Gbs verplaatsen is de HD van mn foon niet op berekend.. 🙈

HD 143006: Interferometric Confirmation of Misaligned Protoplanetary Disc with CHARA/MIRCX and VLTI/PIONIER
I. Codron, S. Kraus, J. D. Monnier, S. Marino, C. L. Davies, N. Anugu, T. Gardner, N. Ibrahim, C. Lanthermann, J-B Le Bouquin
https://arxiv.org/abs/2506.19668

HD 143006: Interferometric Confirmation of Misaligned Protoplanetary Disc with CHARA/MIRCX and VLTI/PIONIER
The outer regions of the protoplanetary disc surrounding the T Tauri star HD 143006 show rings, dust asymmetries and shadows. Whilst rings and dust asymmetries can arise from companions and other mechanisms, shadows and misaligned discs in particular are typically attributed to the presence of misaligned planets or stellar-mass companions. To understand the mechanisms that drive these traits, the innermost regions of discs need to be studied. Using CHARA/MIRCX and VLTI/PIONIER, we observed the …

Foo Fighters - Everlong (Official HD Video)
https://www.youtube.com/watch?v=eBG7P-K-r1Y

This https://arxiv.org/abs/2411.10596 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qbi…

A minimalistic representation model for head direction system
We present a minimalistic representation model for the head direction (HD) system, aiming to learn a high-dimensional representation of head direction that captures essential properties of HD cells. Our model is a representation of rotation group $U(1)$, and we study both the fully connected version and convolutional version. We demonstrate the emergence of Gaussian-like tuning profiles and a 2D circle geometry in both versions of the model. We also demonstrate that the learned model is capable…

Pga rea och fascination för den jRPG:ns besatthet av judisk (och övrig "västerländsk" mystik passar jag på att faktiskt köpa spelen "Elohim Eternal: The Babel Code" och "El Shaddai ASCENSION OF THE METATRON HD Remaster"

Aus irgendeinem Grund ist gerade die Sonos-Radio-Station "The Lighthouse", über die Brian Eno jede Menge unveröffentlichte Tracks abspielen läßt, gratis (man braucht halt ein Sonos-Gerät dazu), und ich höre mich da nun etwas durch.
DJ Food hat das ein paar Monate lang gemacht übrigens, und mitgeschrieben (Stand 2023):
ht…

Brian Eno – The Lighthouse, what’s on it?
I’ve been compiling this, off and on, all year, while listening to the 340+ unreleased tracks on Brian Eno‘s Sonos HD radio station, The Lighthouse. If I had the phone nearby I’d check what’s playing, make a note of the track number and year and write a short description. I was intrigued to see how often tracks repeated (not very often), how long it would take me to hear all of them (over 6 months) and what the ratio of good to average to bad was. It became quite addictive as I’d fill…

Am 18. November werden euch eure Eltern anrufen #linearTV #SDabschaltung https://www.

SD-Abschaltung – Auch DLF betroffen
Mit 18. November verabschieden sich die ZDF-Programme von ihrer SD-Verbreitung über Astra 19,2 Grad Ost und sind fortan nur noch in HD zu sehen. Von der SD-Abschaltung ist auch das Deutschlandradio betroffen.

The Impact of Different Haze Types on the Atmosphere and Observations of Hot Jupiters: 3D Simulations of HD 189733b, HD209458b and WASP-39b
Mei Ting Mak, Denis Sergeev, Nathan Mayne, Maria Zamyatina, Maria E. Steinrueck, James Manners, Eric Hebrard, David K. Sing, Krisztian Kohary
https://arxiv.org/abs/2507.20366

The Impact of Different Haze Types on the Atmosphere and Observations of Hot Jupiters: 3D Simulations of HD 189733b, HD209458b and WASP-39b
We present the results from the simulations of the atmospheres of hot-Jupiters HD189733b, HD209458b and WASP-39b, assuming the presence of three different types of haze. Using a 3D General Circulation Model, the Unified Model, we capture the advection, settling and radiative impact of Titan-like, water-world-like and soot-like haze, with a particle radius of 1.5 nm. We show that the radiative impact of haze leads to drastic changes in the thermal structure and circulation in the atmosphere. We …

It has become relatively easy & affordable to put together an LED Matrix sign. Recently I put together a 6 panel display using 1/8 scan modules for something much brighter than the 1/16 & 1/32 scan modules I usually use. It's bright enough to carry around in high noon sunlight. (I wish it were brighter still)
For past projects with realtime graphics, I've used hzeller's raspberry pi library. Here I used the Huidu HD-D16 controller board that seems to be ARM FPGA …

Caramella Girls - Caramelldansen HD Version (Swedish Original) Official
#NowPlaying

Spectral analysis of HD 49798, a bright, hydrogen-deficient sdO-type donor star in an accreting X-ray binary
Thomas Rauch (Institute for Astronomy and Astrophysics, Eberhard Karls University, Tuebingen, Germany), Paul Strau{\ss} (Institute for Astronomy and Astrophysics, Eberhard Karls University, Tuebingen, Germany)
https://arx…

Spectral analysis of HD 49798, a bright, hydrogen-deficient sdO-type donor star in an accreting X-ray binary
Context: HD 49798 is a bright ($m_{\rm V} = 8.287$), hot (effective temperature $T_{\rm eff} = 45000$ K) subdwarf star of the spectral type O (sdO). It is the only confirmed sdO-type mass-donor star of an X-ray binary that has a high-mass (1.28 $M_\odot$) white-dwarf or neutron-star primary with a spin period of only 13.2 s. Aims: Since a high-quality spectrum of HD 49798, obtained with the Tübingen Ultraviolet Echelle Spectrometer (TUES), that has never been analyzed before is available in th…

The NEID Earth Twin Survey. IV. Confirming an 89 d, $m\sin i=10~\mathrm{M_\oplus}$ Planet Orbiting a Nearby Sun-like Star
Mark R. Giovinazzi, Evan Fitzmaurice, Arvind F. Gupta, Paul Robertson, Suvrath Mahadevan, Eric B. Ford, Jaime A. Alvarado-Montes, Chad F. Bender, Cullen H. Blake, Jiayin Dong, Rachel B. Fernandes, Samuel Halverson, Te Han, Shubham Kanodia, Daniel M. Krolikowski, Sarah E. Logsdon, Joe P. Ninan, Arpita Roy, Christian Schwab, Gudmundur Stefansson, Ryan C. Terrien, Jaso…

The NEID Earth Twin Survey. IV. Confirming an 89 d, $m\sin i=10~\mathrm{M_\oplus}$ Planet Orbiting a Nearby Sun-like Star
We present the confirmation of HD 190360 d, a warm ($P=88.690^{+0.051}_{-0.049}~\mathrm{d}$), low-mass ($m\sin i=10.23^{+0.81}_{-0.80}~\mathrm{M_\oplus}$) planet orbiting the nearby ($d=16.0$ pc), Sun-like (G7) star HD 190360. We detect HD 190360 d at high statistical significance even though its radial velocity (RV) semi-amplitude is only $K=1.48\pm0.11~\mathrm{m~s^{-1}}$. Such low-amplitude signals are often challenging to confirm due to potential confusion with low-amplitude stellar signals.…

Rage Against The Machine - Killing In the Name (Official HD Video)
https://www.youtube.com/watch?v=bWXazVhlyxQ
Überraschung, die Kommentare sind wieder jüngeren Datums.

Unlocking Excellence: The Impact of Voucher Incentives on Cybersecurity Education
Jianhua Li, Shang Gao, Michelle Harvey, Trina Myers
https://arxiv.org/abs/2508.01520 https://…

Unlocking Excellence: The Impact of Voucher Incentives on Cybersecurity Education
While voucher incentives have been popular for primary and secondary schools, they are less used in higher education. In this study, we leverage industry voucher incentives to inspire students in cybersecurity education (CSE). We adopt a 100% portfolio-based assessment strategy, where students can freely select their target grades in the investigated unit. We purposely design one of the high distinction (HD) tasks to be obtaining an industry certificate and provide vouchers to those who can acc…

Yay #TheRookie is on #Netflix India. Prime. Video sucks on Linux. No HD.
Huge fan of #Castle. Love Stana Katic 😍 but it’s a shame Nathan Fillion (allegedly) bullied her on set to the po…

Osiris revisited: Confirming a solar metallicity and low C/O in HD 209458b
N. Bachmann, L. Kreidberg, P. Molli\`ere, D. Deming, S. -M. Tsai
https://arxiv.org/abs/2506.16232

Osiris revisited: Confirming a solar metallicity and low C/O in HD 209458b
HD 209458b is the prototypical hot Jupiter and one of the best targets available for precise atmosphere characterisation. Now that spectra from both Hubble Space Telescope (HST) and James Webb Space Telescope (JWST) are available, we can reveal the atmospheric properties in unprecedented detail. In this study, we perform a new data reduction and analysis of the original HST/WFC3 spectrum, accounting for the wavelength dependence of the instrument systematics that was not considered in previous …

🇺🇦 #NowPlaying on #BBC6Music's #DonLettsCultureClashRadio
Björk:
🎵 I Miss You
#Björk
https://poop.bandcamp.com/track/bjork-i-miss-you-mv-official-music-video-hd
https://open.spotify.com/track/2pDMVFdeAsFI73DDekyvDf

Finder Progress Bar not showing or disappeared!
Copying files from HD to Macbook, but progress bar disappeared after switching the window ! How to find that file transfer progress bar ?

I found the solution!
It was rather simple, follow below steps:
1. Open finder
2. From top bar select "window"
3. From the different options toggle "Hide progress bar" or "Show progress bar"

You'll able to see the progres…

Don’t you hate it when #FreeTube is being ip-blocked, and #YouTube automatically starts a mix playlist every time you click on a music video?
🤢 🤢

Ice sublimation in the dynamic HD 100453 disk reveals a rich reservoir of inherited complex organics: #Disk: https://www.cfa.harvard.edu/news/key-building-block-life-discovered-planet-forming-disk - CfA astronomers have helped discover rare types of methanol, a building block required for life as we know it to form.

Historical Prediction Attention Mechanism based Trajectory Forecasting for Proactive Work Zone Safety in a Digital Twin Environment
Minhaj Uddin Ahmad, Mizanur Rahman, Alican Sevim, David Bodoh, Sakib Khan, Li Zhao, Nathan Huynh, Eren Erman Ozguven
https://arxiv.org/abs/2508.06544

Historical Prediction Attention Mechanism based Trajectory Forecasting for Proactive Work Zone Safety in a Digital Twin Environment
Proactive safety systems aim to mitigate risks by anticipating potential conflicts between vehicles and enabling early intervention to prevent work zone-related crashes. This study presents an infrastructure-enabled proactive work zone safety warning system that leverages a Digital Twin environment, integrating real-time multi-sensor data, detailed High-Definition (HD) maps, and a historical prediction attention mechanism-based trajectory prediction model. Using a co-simulation environment that…

Heute vor 72 Jahren: Am 12. August 1953 testete die #Sowjetunion mit RDS-6s ihre erste thermonukleare Waffe. Die Explosion der #Wasserstoffbombe hatte eine Sprengkraft von 400 Kilotonnen TNT, wobei der Großteil der Energie aus der Spaltung von Uran-238 stammte.

CAKE - The Distance (Official HD Video)
https://www.youtube.com/watch?v=F_HoMkkRHv8

The CHEOPS view of HD 95338b: refined transit parameters, and a search for exomoons
Sz. K\'alm\'an, A. E. Simon, A. Deline, Sz. Csizmadia, Gy. M. Szab\'o, D. Ehrenreich, T. G. Wilson, M. N. G\"unther, A. Heitzmann, S. G. Sousa, M. Farnir, A. Bonfanti, A. M. S. Smith, A. P\'al, G. Scandariato, V. Adibekyan, A. Brandeker, S. Charnoz, B. Akinsanmi, S. C. C. Barros, X. Song, Y. Alibert, R. Alonso, T. B\'arczy, D. Barrado Navascues, W. Baumjohann, W. Benz, N. Billot…

The CHEOPS view of HD 95338b: refined transit parameters, and a search for exomoons
Despite the ever-increasing number of known exoplanets, no uncontested detections have been made of their satellites, known as exomoons. The quest to find exomoons is at the forefront of exoplanetary sciences. Certain space-born instruments are thought to be suitable for this purpose. We show the progress made with the CHaracterizing ExOPlanets Satellite (CHEOPS) in this field using the HD 95338 planetary system. We present a novel methodology as an important step in the quest to find exomoons.…

Hydroxylated Mg-rich amorphous silicates as catalysts for molecular hydrogen formation in the interstellar medium
V. Mennella, T. Suhasaria, B. Kerkeni, G. Ouerfelli
https://arxiv.org/abs/2506.11596

Hydroxylated Mg-rich amorphous silicates as catalysts for molecular hydrogen formation in the interstellar medium
We present results from an experimental study on the interaction of atomic deuterium with Mg-rich amorphous enstatite and forsterite type silicates. Infrared spectroscopy was used to examine the process. During D atom exposure, deuteroxyl group formation was observed. The cross section for OD group formation, estimated from the OD stretching band intensity with D atom fluence, is 4.2.10^{-18} cm^2 for both silicates. HD (D2) molecules form via D atom abstraction of chemisorbed H(D) atoms from O…

Precise Age For The Binary HD 21278 In The Young Alpha Persei Cluster
Christopher A. Danner, Eric L. Sandquist, Gail H. Schaefer, Luigi R. Bedin, Christopher D. Farrington, Cyprien Lanthermann, Stefan Kraus, Robert Klement, Narsireddy Anugu, John D. Monnier, Jerome A. Orosz, Isabelle Codron, Tyler Gardner, Mayra Gutierrez, Benjamin R. Setterholm, Jeremy Jones, Becky Flores
…

Precise Age For The Binary HD 21278 In The Young Alpha Persei Cluster
We present a study of the double-lined spectroscopic binary HD 21278 that contains one of the brightest main sequence stars in the young $α$ Persei open cluster. We analyzed new spectra and reanalyzed archived spectra to measure precise new radial velocity curves for the binary. We also obtained interferometric data using the CHARA Array at Mount Wilson to measure the sky positions of the two stars and the inclination of the $\sim$ 2 milliarcsecond orbit. We determine that the two stars have m…

Water ice in the #DebrisDisk around HD 181327: https://arxiv.org/abs/2505.08863 -> NASA Webb Identifies Frozen Water in Young Star System: https://webbtelescope.org/contents/news-releases/2025/news-2025-119

Orgy - 'Blue Monday' (Music Video) HD
https://www.youtube.com/watch?v=aJZTfl3DmCU

The SPACE Program I: The featureless spectrum of HD 86226 c challenges sub-Neptune atmosphere trends
K. Angelique Kahle (Max Planck Institute for Astronomy, Department of Physics and Astronomy, Heidelberg University), Jasmina Blecic (Department of Physics, New York University Abu Dhabi, Center for Astrophysics and Space Science), Reza Ashtari (JHU Applied Physics Laboratory), Laura Kreidberg (Max Planck Institute for Astronomy), Yui Kawashima (Department of Astronomy, Graduate School o…

The SPACE Program I: The featureless spectrum of HD 86226 c challenges sub-Neptune atmosphere trends
Sub-Neptune exoplanets are the most abundant type of planet known today. As they do not have a Solar System counterpart, many open questions exist about their composition and formation. Previous spectroscopic studies rule out aerosol-free hydrogen-helium-dominated atmospheres for many characterized sub-Neptunes but are inconclusive about their exact atmospheric compositions. Here we characterize the hot (Teq=1311K) sub-Neptune HD 86226 c, which orbits its G-type host star. Its high equilibrium …

Circumbinary disc interactions and stochastic dust obscuration in the post-asymptotic-giant-branch binary HD 213985
Krystian Ilkiewicz, Lea Planquart, Tomek Kaminski, Hans Van Winckel
https://arxiv.org/abs/2506.07260

Circumbinary disc interactions and stochastic dust obscuration in the post-asymptotic-giant-branch binary HD 213985
HD 213985 is an eccentric binary system with a post-AGB primary and a jet-launching secondary star. We confirm that the system photometric variability is likely due to obscuration by the inner edge of a circumbinary disc, similar to RVb-type RV Tau stars. The system has shown an increase in the orbital variability amplitude in optical photometric bands, along with irregular changes in its shape that often started to appear skewed. Variability in the Na D lines suggests that this behaviour may b…

Joint Sensing and Bi-Directional Communication with Dynamic TDD Enabled Cell-Free MIMO
Anubhab Chowdhury, Sai Subramanyam Thoota, Erik G. Larsson
https://arxiv.org/abs/2508.03460

Joint Sensing and Bi-Directional Communication with Dynamic TDD Enabled Cell-Free MIMO
This paper studies integrated sensing and communication (ISAC) with dynamic time division duplex (DTDD) cell-free (CF) massive multiple-input multiple-output~(mMIMO) systems. DTDD enables the CF mMIMO system to concurrently serve both uplink~(UL) and downlink~(DL) users with spatially separated \emph{half-duplex~(HD)} access points~(APs) using the same time-frequency resources. Further, to facilitate ISAC, the UL APs are utilized for both UL data and target echo reception, while the DL APs join…

Discovery of a multi-planetary system orbiting the aged Sun-like star HD 224018
M. Damasso, L. Naponiello, A. Anna John, J. A. Egger, M. Cretignier, A. Mortier, A. S. Bonomo, A. Collier Cameron, X. Dumusque, T. Wilson, L. Buchhave, B. Nicholson, M. Stalport, A. Ghedina, D. W. Latham, J. Livingston, L. Malavolta, A. Sozzetti, J. M. Jenkins, G. Mantovan, A. F. Mart\'inez Fiorenzano, L. Palethorpe, R. Tronsgaard, S. Udry, C. A. Watson

Discovery of a multi-planetary system orbiting the aged Sun-like star HD 224018
In 2016, Kepler/K2 detected a system of two sub-Neptunes transiting the star HD 224018, one of them showing a mono-transit event. In 2017, we began a spectroscopic follow-up with HARPS-N to measure the dynamical masses of the planets using radial velocities, and collected additional transit observations using CHEOPS. We measured the fundamental physical parameters of the host star, which is an ``old Sun'' analogue. We analysed radial velocities and photometric time series, also including data b…

P.O.D. - Boom (Official Music Video) [HD]
https://www.youtube.com/watch?v=lYHA_7vxrgc

The multi-faceted variability of HD 192639: Stochastic behaviour, regularities, and an exceptional mass-ejection event
Gregor Rauw, Ya\"el Naz\'e, Charles-Antoine Gilon
https://arxiv.org/abs/2508.01870

The multi-faceted variability of HD 192639: Stochastic behaviour, regularities, and an exceptional mass-ejection event
Spectroscopic and photometric variability is widespread among O-type supergiants. It is linked to various phenomena affecting the star and its circumstellar environment, thereby providing direct information concerning them. To investigate such connections, we decided to revisit the prototypical O7.5 Iabf supergiant HD 192639. High-cadence spectroscopic monitoring was performed simultaneously with intensive space-borne photometric observations. The data were analysed with several methods to char…

ALMA millimetre-wavelength imaging of HD 138965: New constraints on the debris dust composition and presence of planetary companions
J. P. Marshall, S. Hengst, A. Trejo-Cruz, C. del Burgo, J. Milli, M. Booth, J. C. Augereau, E. Choquet, F. Y. Morales, P. Th\'ebault, F. Kemper, V. Faramaz-Gorka, G. Bryden
https://arxiv.org/ab…

ALMA millimetre-wavelength imaging of HD 138965: New constraints on the debris dust composition and presence of planetary companions
HD 138965 is a young A type star and member of the nearby young Argus association. This star is surrounded by a broad, bright debris disc with two temperature components that was spatially resolved at far-infrared wavelengths by Herschel. Here we present ALMA millimetre-wavelength imaging of the cool outer belt. These reveal its radial extent to be $150^{+10}_{-7}$ au with a width ($σ$) of 49$^{+7}_{-6}$ au ($ΔR/R$ = 0.77), at a moderate inclination of 49$\fdeg$9^{+3.3}_{-3.7}$. Due to the li…

HD 5501: A Rapidly Evolving Interacting Eclipsing Binary with a Variable Light Curve and H$\alpha$ Emission
Richard O. Gray, Christopher. J. Corbally, Sean Curry, Bradley E. Schaefer, Jack Martin, David Boyd, James Foster, Dale E. Mais, Michael M. Briley, Forrest Sims, Christophe Boussin, Gary Walker, Joe Novosel, David Cejudo Fernandez, Robert Buchheim, David Iadevaia, Robin Leadbeater, Daniel B. Caton, Adam Smith, Courtney E. McGahee, David Decker, Gary Hawkins

HD 5501: A Rapidly Evolving Interacting Eclipsing Binary with a Variable Light Curve and H$α$ Emission
HD~5501, a hitherto little studied eclipsing binary with an early A-type primary, has been caught in a short-lived, astrophysically interesting phase of its binary evolution. Recent photometric and spectroscopic observations, including photometric data from {\it TESS}, show it has a highly variable light curve as well as complex spectral variability, particularly in both the absorption and emission components at H~$α$. Our current campaign, including both professional and amateur observers, ha…

"As a patient of a psychologist I would say it has therapeutic value, because it releases something deep inside of me."
CAKE - Short Skirt / Long Jacket (Official HD Video)
https://www.youtube.com/watch?v=X5KmB8Laemg

A circularly polarized low-frequency radio burst from the exoplanetary system HD 189733
X. Zhang, P. Zarka, J. N. Girard, C. Tasse, A. Loh, E. Mauduit, F. G. Mertens, E. Bonnassieux, C. K. Louis, J-M. Grie{\ss}meier, J. D. Turner, L. Lamy, A. Strugarek, S. Corbel, B. Cecconi, O. Konovalenko, V. Zakharenko, O. Ulyanov, P. Tokarsky, M. Tagger
https://

A circularly polarized low-frequency radio burst from the exoplanetary system HD 189733
We aim to detect low-frequency radio emission from exoplanetary systems, which can provide insights into planetary magnetic fields, star-planet interactions, stellar activity, and exo-space weather. The HD 189733 system, hosting a well-studied hot Jupiter, is a prime target for such searches. We conducted NenuFAR imaging observations in the 15-62 MHz range, in order to cover the entire orbital phase of HD 189733 b. Dynamic spectra were generated for the target and other sources in the field, fo…

Breaking the Mass Inclination Degeneracy of Radial Velocity Measurements via Monitoring von Zeipel-Lidov-Kozai Cycles: Implications in the HD 41004 System
Zhizhen Qin, Shang-Fei Liu, Bo Ma, Fabo Feng
https://arxiv.org/abs/2507.10653

Breaking the Mass Inclination Degeneracy of Radial Velocity Measurements via Monitoring von Zeipel-Lidov-Kozai Cycles: Implications in the HD 41004 System
We investigate the dynamical stability of the S-type planet in the compact binary HD 41004. Using $N$-body simulations, we find that the planet could be dynamically stable at a mutual angle inclination up to $\sim75^\circ$. The von Zeipel-Lidov-Kozai (vZLK) mechanism becomes active when the mutual inclination is greater than 39.2$^\circ$. High-inclination orbits exhibit coupled oscillations in eccentricity and inclination, along with apsidal precession. Synthetic radial velocity (RV) modeling s…

Direct imaging discovery of a young giant planet orbiting on Solar System scales
T. Stolker, M. Samland, L. B. F. M. Waters, M. E. van den Ancker, W. O. Balmer, S. Lacour, M. L. Sitko, J. J. Wang, M. Nowak, A. -L. Maire, J. Kammerer, G. P. P. L. Otten, R. Abuter, A. Amorim, M. Benisty, J. -P. Berger, H. Beust, S. Blunt, A. Boccaletti, M. Bonnefoy, H. Bonnet, M. S. Bordoni, G. Bourdarot, W. Brandner, F. Cantalloube, P. Caselli, B. Charnay, G. Chauvin, A. Chavez, A. Chomez, E. Choquet, V…

Direct imaging discovery of a young giant planet orbiting on Solar System scales
HD 135344 AB is a young visual binary system that is best known for the protoplanetary disk around the secondary star. The circumstellar environment of the A0-type primary star, on the other hand, is already depleted. HD 135344 A is therefore an ideal target for the exploration of recently formed giant planets because it is not obscured by dust. We searched for and characterized substellar companions to HD 135344 A down to separations of about 10 au. We observed HD 135344 A with VLT/SPHERE in t…

#HD #4K #1080p #LA #California

MINDS: Detection of an inner gas disk caused by evaporating bodies around HD 172555
M. Samland, T. Henning, A. Caratti o Garatti, T. Giannini, J. Bouwman, B. Tabone, A. M. Arabhavi, G. Olofsson, M. G\"udel, N. Pawellek, I. Kamp, L. B. F. M. Waters, D. Semenov, E. F. van Dishoeck, O. Absil, D. Barrado, A. Boccaletti, V. Christiaens, D. Gasman, S. L. Grant, H. Jang, T. Kaeufer, J. Kanwar, G. Perotti, K. Schwarz, M. Temmink

MINDS: Detection of an inner gas disk caused by evaporating bodies around HD 172555
Mechanisms such as collisions of rocky bodies or cometary activity give rise to dusty debris disks. Debris disks trace the leftover building blocks of planets, and thus also planetary composition. HD 172555, a stellar twin of beta Pic, hosts a debris disk thought to have resulted from a giant collision. It is known for its extreme mid-infrared silica dust feature, indicating a warm population of silica-rich grains in the asteroid belt (~5 au), cold CO observed by ALMA, and small bodies evaporat…

Pulsating and Non-pulsating Components of Detached Eclipsing Binaries in the $\delta$ Scuti instability strip
Filiz Kahraman Ali\c{c}avu\c{s}, Fahri Ali\c{c}avu\c{s}, Zeynep \c{C}elik Orhan, Eda \c{C}elik, Giovanni Catanzaro, Marina Giarrusso
https://arxiv.org/abs/2508.14464

Pulsating and Non-pulsating Components of Detached Eclipsing Binaries in the $δ$ Scuti instability strip
Pulsating detached eclipsing binary systems are crucial for studying the internal structure of oscillating stars. These systems are advantageous because binary effects on pulsations are minimal, allowing for more accurate determinations of fundamental stellar parameters such as mass and radius. They serve as unique laboratories for detailed investigations of pulsating stars. In this study, we focused on four detached eclipsing binaries exhibiting $δ$ Scuti-type oscillations: HD 117476, 205 Dra…

The watery atmosphere of HD~209458~b revealed by joint $K$- and $L$-band high-resolution spectroscopy
Luke Finnerty, Julie Inglis, Michael P. Fitzgerald, Daniel Echeverri, Nemanja Jovanovic, Dimitri Mawet, Geoffrey A. Blake, Ashley Baker, Randall Bartos, Benjamin Calvin, Sylvain Cetre, Jacques-Robert Delorme, Greg Doppmann, Katelyn Horstman, Chih-Chun Hsu, Joshua Liberman, Ronald A. L\'opez, Evan Morris, Jacklyn Pezzato-Rovner, Jean-Baptiste Ruffio, Ben Sappey, Tobias Schofield, An…

The watery atmosphere of HD~209458~b revealed by joint $K$- and $L$-band high-resolution spectroscopy
We present a joint analysis of high-resolution $K$- and $L$-band observations of the benchmark hot Jupiter \hdb\ from the Keck Planet Imager and Characterizer (KPIC). One half night of observations were obtained in each bandpass covering similar pre-eclipse phases. The two epochs were then jointly analyzed using our atmospheric retrieval pipeline based on \petit\ to constrain the atmospheric pressure-temperature profile and chemical composition. Consistent with recent results from \textit{JWST}…

Spectral analysis of two directly imaged benchmark L dwarf companions at the stellar-substellar boundary
William Ceva, Elisabeth C. Matthews, Emily L. Rickman, Damien S\'egransan, Arthur Vigan, Brendan P. Bowler, Thierry Forveille, Kyle Franson, Janis Hagelberg, St\'ephane Udry
https://arxiv.org/abs/2507.08654

Spectral analysis of two directly imaged benchmark L dwarf companions at the stellar-substellar boundary
We used multiple epochs of high-contrast imaging spectrophotometric observations to determine the atmospheric characteristics and thermal evolution of two previously detected benchmark L dwarf companions, HD 112863 B and HD 206505 B. We analyzed IRDIS and IFS data from VLT/SPHERE of each companion, both of which have dynamical masses near the stellar-substellar boundary. We compared each companion with empirical spectral standards, as well as constrained their physical properties through atmosp…

On the Origin of Neutron-capture Elements in r-I and r-II Stars: A Differential-abundance Analysis
Pallavi Saraf, Thirupathi Sivarani, Timothy C. Beers, Yutaka Hirai, Masaomi Tanaka, Carlos Allende Prieto, Drisya Karinkuzhi
https://arxiv.org/abs/2508.08847

On the Origin of Neutron-capture Elements in r-I and r-II Stars: A Differential-abundance Analysis
We present a strictly line-by-line differential analysis of a moderately $r$-process-enhanced star ($r$-I: HD~107752) with respect to a strongly $r$-process-enhanced star ($r$-II: CS~31082-0001) to investigate the possible common origin of their heavy-element nucleosynthesis with high-precision abundances. This study employs ESO data archive high-resolution and high signal-to-noise spectra taken with the UVES (VLT) spectrograph. Considering only the lines in common in both spectra, we estimate …

Replaced article(s) found for astro-ph.EP. https://arxiv.org/list/astro-ph.EP/new
[1/1]:
- The GAPS Programme at TNG LXVIII. Characterization of the outer substellar companion around HD 72...
A. Ruggieri, et al.

Eighteen Exoplanet Host Stars from the NPOI Data Archive
Ellyn K. Baines, Jeremy Jones, James H. Clark III, Henrique R. Schmitt, Jordan M. Stone
https://arxiv.org/abs/2506.02934

Eighteen Exoplanet Host Stars from the NPOI Data Archive
During the course of publishing angular diameters from the Navy Precision Optical Interferometer data archive, we found we had data on 17 confirmed exoplanet host stars and one exoplanet candidate (HD 20902/alpha Per). Here, we update our previously published stellar radii with more precise Gaia parallaxes when available, and use our radius and effective temperature measurements to fit each star's mass and age using MIST models. The mass changed by more than 10% for 9 of the 18 stars. Combining…