29 citations · 238 across the 23 of their papers we have counts for
23 papers
Mapping the Intracluster Medium in the Era of High-resolution X-ray Spectroscopy
Congyao Zhang, Irina Zhuravleva, Maxim Markevitch +24
High-resolution spectroscopy in soft X-rays will open a new window to map multiphase gas in galaxy clusters and probe physics of the intracluster medium (ICM), including chemical e…
X-ray metal line emission from the hot circumgalactic medium: probing the effects of supermassive black hole feedback
Nhut Truong, Annalisa Pillepich, Dylan Nelson +15
We derive predictions from state-of-the-art cosmological galaxy simulations for the spatial distribution of the hot circumgalactic medium (CGM, ) through its…
Chandra X-Ray Observations of Abell 119: Cold Fronts And A Shock In An Evolved Off-Axis Merger
Courtney B. Watson, Elizabeth L. Blanton, Scott W. Randall +4
We present Chandra X-ray observations of the dynamically complex galaxy cluster Abell 119 (). A119 is host to two NAT radio sources (0053-015 & 0053-016) whose tails are…
Mapping the imprints of stellar and AGN feedback in the circumgalactic medium with X-ray microcalorimeters
Gerrit Schellenberger, Ákos Bogdán, John A. ZuHone +24
The Astro2020 Decadal Survey has identified the mapping of the circumgalactic medium (CGM, gaseous plasma around galaxies) as a key objective. We explore the prospects for characte…
Resonant scattering of the OVII X-ray emission line in the circumgalactic medium of TNG50 galaxies
Dylan Nelson, Chris Byrohl, Anna Ogorzalek +15
We study the impact of resonantly scattered X-ray line emission on the observability of the hot circumgalactic medium (CGM) of galaxies. We apply a Monte Carlo radiative transfer p…
Circumgalactic Medium on the Largest Scales: Detecting X-ray Absorption Lines with Large-Area Microcalorimeters
Akos Bogdan, Ildar Khabibullin, Orsolya Kovacs +22
The circumgalactic medium (CGM) plays a crucial role in galaxy evolution as it fuels star formation, retains metals ejected from the galaxies, and hosts gas flows in and out of gal…
Criteria for Dynamical Timescale Mass Transfer of Metal-poor Intermediate-mass Stars
Hongwei Ge, Christopher A. Tout, Xuefei Chen +3
The stability criteria of rapid mass transfer and common envelope evolution are fundamental in binary star evolution. They determine the mass, mass ratio and orbital distribution o…
New insights into the helium star formation channel of AM CVn systems with explanations of Gaia14aae and ZTFJ1637+49
Arnab Sarkar, Hongwei Ge, Christopher A. Tout
We model helium-rich stars with solar metallicity () progenitors that evolve to form AM Canum Venaticorum systems through a helium-star formation channel, with the…
Viscous attenuation of gravitational waves propagating through an inhomogeneous background
Shashank Shekhar Pandey, Arnab Sarkar, Amna Ali +1
We consider the propagation of gravitational waves in the late-time Universe in the presence of matter distribution inhomogeneities, and we also consider the cosmic fluid to be vis…
Gas sloshing and cold fronts in pre-merging galaxy cluster Abell 98
Arnab Sarkar, Scott Randall, Yuanyuan Su +10
We present deep Chandra observations of the pre-merger galaxy cluster Abell 98. Abell 98 is a complex merging system. While the northern (A98N) and central subclusters (A98S) are m…
Enhanced power of gravitational waves and rapid coalescence of black hole binaries through dark energy accretion
Arnab Sarkar, Amna Ali, K. Rajesh Nayak +1
We consider the accretion of dark energy by constituent black holes in binary formations during the present epoch of the Universe. In the context of an observationally consistent d…
Chemical abundances in the outskirts of nearby galaxy groups measured with joint Suzaku and Chandra observations
Arnab Sarkar, Yuanyuan Su, Nhut Truong +5
We report results from deep Suzaku and mostly snapshot Chandra observations of four nearby galaxy groups: MKW4, Antlia, RXJ1159+5531, and ESO3060170. Their peak temperatures vary o…
Discovery of a pre-merger shock in an intercluster filament in Abell 98
Arnab Sarkar, Scott Randall, Yuanyuan Su +11
We report the first unambiguous detection of an axial merger shock in the early-stage merging cluster Abell 98 using deep (227 ks) Chandra observations. The shock is about 420 kpc…
Suzaku Observations of the Cluster Outskirts and Intercluster Filament in the Triple Merger Cluster Abell 98
Gabriella E. Alvarez, Scott W. Randall, Yuanyuan Su +5
We present Suzaku observations of the Abell 98 (A98) triple galaxy cluster system and the purported intercluster filament. The three subclusters are expected to lie along a large s…
A unified model for the evolution of cataclysmic variables
Arnab Sarkar, Christopher A. Tout
We give an updated version of the analytical equation of state used in the Cambridge stellar evolution code (STARS) as a free to use open-source package that we have used to model…
Effect of inhomogeneities on the propagation of gravitational waves from binaries of compact objects
Shashank S. Pandey, Arnab Sarkar, Amna Ali +1
We consider the propagation of gravitational waves in the late time Universe with the presence of structure. Before detection, gravitational waves emitted from distant sources have…
Evolution of axial perturbations in space-time of a non-rotating uncharged primordial black hole
Arnab Sarkar, Sabiruddin Molla, K. Rajesh Nayak
We derive the equation governing the axial-perturbations in the space-time of a non-rotating uncharged primordial black hole (PBH), produced in early Universe, whose metric is take…
Joint Suzaku and Chandra observations of the MKW4 galaxy group out to the virial radius
Arnab Sarkar, Yuanyuan Su, Scott Randall +5
We present joint Suzaku and Chandra observations of MKW4. With a global temperature of 1.6 keV, MKW4 is one of the smallest galaxy groups that have been mapped in X-rays out to the…
Modified virial theorem for highly magnetized white dwarfs
Banibrata Mukhopadhyay, Arnab Sarkar, Christopher A. Tout
Generally the virial theorem provides a relation between various components of energy integrated over a system. This helps us to understand the underlying equilibrium. Based on the…
Perturbative correction terms to electromagnetic self-force due to metric perturbation : astrophysical and cosmological implications
Arnab Sarkar, Amna Ali, Salah Nasri
We consider the equation of motion of a charged particle or a charged compact object in curved space-time, under the reaction of electromagnetic radiation and also consider a physi…
Stochastic gravitational wave background from accreting primordial black hole binaries during early inspiral stage
Arnab Sarkar, K. Rajesh Nayak, A. S. Majumdar
We investigate the stochastic gravitational wave background produced by primordial black hole binaries during their early inspiral stage while accreting high-density radiation surr…
On the star formation efficiency in high redshift Lyman-α emitters
Arnab Sarkar, Saumyadip Samui
We present semi-analytical models of high redshift Lyman-α emitters (LAEs) in order to constrain the star formation efficiency in those galaxies. Our supernova feedback induced sta…
A Dichotomy for GK dimensions of simple modules over simple differential rings
Ashish Gupta, Arnab Dey Sarkar
The Gelfand--Kirillov dimension has gained importance since its introduction as an tool in the study of non-commutative infinite dimensional algebras and their modules. In this pap…