Tootfinder

The Nature of X-Rays from Young Stellar Objects in the Orion Nebula Cluster -- A Chandra HETGS Legacy Project
Norbert S. Schulz, David P. Huenemoerder, David A. Principe, Marc Gagne, Hans Moritz G\"unther, Joel Kastner, Joy Nichols, Andrew Pollock, Thomas Preibisch, Paola Testa, Fabio Reale, Fabio Favata, Claude R. Canizares
https://

The Nature of X-Rays from Young Stellar Objects in the Orion Nebula Cluster -- A Chandra HETGS Legacy Project
The Orion Nebula Cluster (ONC) is the closest site of very young ($\sim$ 1 Myrs) massive star formation. The ONC hosts more than 1600 young and X-ray bright stars with masses ranging from $\sim$ 0.1 to 35 $M_\odot$. The Chandra HETGS Orion Legacy Project observed the ONC with the Chandra high energy transmission grating spectrometer (HETGS) for $2.1\,$Ms. We describe the spectral extraction and cleaning processes necessary to separate overlapping spectra. We obtained 36 high resolution spectra …

Chandra Study of the Proper Motion of HST-1 in the Jet of M87
Rameshan Thimmappa, Joseph Neilsen, Daryl Haggard, Michael A. Nowak, Sera Markoff
https://arxiv.org/abs/2404.19272

Chandra Study of the Proper Motion of HST-1 in the Jet of M87
The radio galaxy M87 is well known for its jet, which features a series of bright knots observable from radio to X-ray wavelengths. We analyze the X-ray image and flux variability of the knot HST-1 in the jet. Our analysis includes all 112 available \textit{Chandra} ACIS-S observations from 2000-2021, with a total exposure time of $\sim$887 ks. We use de-convolved images to study the brightness profile of the X-ray jet and measure the relative separation between the core and HST-1. From 2003-20…

JWST meets Chandra: a large population of Compton thick, feedback-free, and X-ray weak AGN, with a sprinkle of SNe
Roberto Maiolino, Guido Risaliti, Matilde Signorini, Bartolomeo Trefoloni, Ignas Juodzbalis, Jan Scholtz, Hannah Uebler, Francesco D'Eugenio, Stefano Carniani, Andy Fabian, Xihan Ji, Giovanni Mazzolari, Elena Bertola, Marcella Brusa, Andrew J. Bunker, Stephane Charlot, Andrea Comastri, Giovanni Cresci, Christa Noel DeCoursey, Eiichi Egami, Fabrizio Fiore, Roberto Gilli…

JWST meets Chandra: a large population of Compton thick, feedback-free, and X-ray weak AGN, with a sprinkle of SNe
We investigate the X-ray properties of a large sample of 71 broad line and narrow line AGN at 2

Cool-core, X-ray cavities and cold front revealed in RXCJ0352.9 1941 cluster by Chandra and GMRT observations
Satish S. Sonkamble, S. K. Kadam, Surajit Paul, M. B. Pandge, P. K. Pawar, M. K. Patil
https://arxiv.org/abs/2404.19549

Cool-core, X-ray cavities and cold front revealed in RXCJ0352.9+1941 cluster by Chandra and GMRT observations
This paper presents a comprehensive analysis of 30 ks Chandra and 46.8 ks (13 Hr) 1.4 GHz GMRT radio data on the cool-core cluster RXCJ0352.9+1941 with an objective to investigate AGN activities at its core. This study confirms a pair of X-ray cavities at projected distances of about 10.30 kpc and 20.80 kpc, respectively, on the NW and SE of the X-ray peak. GMRT L band (1.4 GHz) data revealed a bright radio source associated with the core of this cluster hosting multiple jet-like emissions. The…

Angle Parametrization of Teichm\"{u}ller space
Subash Chandra Behera, Shiv Parsad
https://arxiv.org/abs/2402.18845 https://arxiv…

Angle Parametrization of Teichmüller space
Let $S_g$ be a closed orientable surface of genus $g \geq 3$, and let $\mathcal{T}_g$ be the Teichmüller space of $S_g$. In this work, we have proved that $\mathcal{T}_g$ can be parametrized by $6g-5$ angle parameters.

This https://arxiv.org/abs/1907.13028 has been replaced.
link: https://scholar.google.com/scholar?q=a

BPHZ renormalisation and vanishing subcriticality asymptotics of the fractional $Φ^3_d$ model
We consider stochastic PDEs on the $d$-dimensional torus with fractional Laplacian of parameter $ρ\in(0,2]$, quadratic nonlinearity and driven by space-time white noise. These equations are known to be locally subcritical, and thus amenable to the theory of regularity structures, if and only if $ρ> d/3$. Using a series of recent results by the second named author, A. Chandra, I. Chevyrev, M. Hairer and L. Zambotti, we obtain precise asymptotics on the renormalisation counterterms as the molli…

Chandra HETG X-ray Spectra and Variability of $\pi$ Aqr, a $\gamma$ Cas-type Be star
David P. Huenemoerder, Pragati Pradhan, Claude R. Canizares, Sean Gunderson, Richard Ignace, Joy S. Nichols, A. M. T. Pollock, Norbert S. Schulz, Dustin K. Swarm, Jose M. Torrejon
https://arxiv.org/abs/2404.16977…

Chandra HETG X-ray Spectra and Variability of $π$ Aqr, a $γ$ Cas-type Be star
High-resolution X-ray spectra of $π\,$Aqr, a $γ\,$Cas-type star, obtained with the Chandra/HETG grating spectrometer, revealed emission lines of H-like ions of Mg, Si, S, and Fe, a strong, hard continuum, and a lack of He-like ions, indicating the presence of very hot thermal plasma. The X-ray light curve showed significant fluctuations, with coherent variability at period of about 3400 seconds in one observation. The hardness ratio was relatively constant except for one observation in which …

X-ray spectral properties of dust-obscured galaxies in the XMM-SERVS coverage of the XMM-LSS field
Abhijit Kayal, Veeresh Singh
https://arxiv.org/abs/2405.00613

X-ray spectral properties of dust-obscured galaxies in the XMM-SERVS coverage of the XMM-LSS field
With an aim to unveil the population of obscured AGN hosted in high-$z$ dust-obscured galaxies (DOGs), we performed X-ray spectral study of $34$ DOGs ($0.59$ $\leq$ $z$ $\leq$ $4.65$) lying within $5.3$ deg$^{2}$ of the XMM-SERVS coverage in the XMM-LSS field. To improve the spectral quality of individual sources, we combined all the existing $\textit{XMM-Newton}$ data and also included $\textit{Chandra}$/ACIS data, whenever available. We find that the X-ray spectra of our DOGs can be fitted wi…

This https://arxiv.org/abs/2309.01621 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

A fresh perspective on the 3D dynamics of Tycho's supernova remnant: Ejecta asymmetries in the X-ray band
450 years after the explosion of the Type Ia SN1572, the dynamics of the Tycho supernova remnant can give us keys to understand the explosion mechanism and the interaction of the remnant with the interstellar medium. To probe the asymmetries and the evolution of the SNR, we track the ejecta dynamics using new methods applied to the deep X-ray observations available in the Chandra space telescope archive. For the line of sight velocity measurement Vz, we use the Doppler effect focused on the bri…

This https://arxiv.org/abs/2404.07432 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

A Chandra Search for Periodic X-ray Sources in the Bulge of M31
We present a systematic search for periodic X-ray sources in the bulge of M31, using ~ 2 Ms of archival Chandra observations spanning a temporal baseline of 16 years. Utilizing the Gregory-Loredo algorithm that is designed for photon-counting, phase-folded light curves, we detect seven periodic X-ray sources, among which four are newly discovered. Three of these sources are novae, the identified periods of which range between 1.3-2.0 hour and is most likely the orbital period. The other four so…