29 citations · 238 across the 23 of their papers we have counts for
9 papers · 1 filter
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…