4 citations · 11 across the 10 of their papers we have counts for
10 papers
The Ringdown and the Tide: Fingerprints of Dark Matter Halo Profiles
Arkadip Bhowmik, Avijit Chowdhury, Sayan Chakrabarti
Astrophysical black holes (BH) are not isolated, but embedded in matter supplied by their host galaxies. We study how the shape of a surrounding dark matter (DM) halo modifies the…
Neutrino-dominated relativistic shocked accretion flow around rotating black hole: implications for short gamma-ray bursts
Amit Kumar, Sayan Chakrabarti, Santabrata Das
We investigate the physical properties of the central engine powering gamma-ray bursts (GRBs), modelled as a stellar-mass black hole accreting via a neutrino-dominated accretion fl…
Dark matter halos and transonic accretion flow
Avijit Chowdhury, Gargi Sen, Sayan Chakrabarti +1
The interplay between supermassive black holes (SMBHs) and their surrounding environment is fundamental to understanding galactic evolution. This work investigates the influence of…
Refining fundamental constants with white dwarfs: machine learning informed constraints on fine-structure constant and proton-to-electron mass ratio
Akhil Uniyal, Surajit Kalita, Yosuke Mizuno +2
We explore the potential variation of two fundamental constants, the fine-structure constant and the proton-to-electron mass ratio , within the framework of modified gravity…
Effect of generic dark matter halo on transonic accretion onto galactic black holes
Avijit Chowdhury, Gargi Sen, Sayan Chakrabarti +1
The environment surrounding a black hole or black hole binaries is generally expected to play an important role in understanding various astrophysical phenomena around them. In thi…
Neutrino-dominated relativistic viscous accretion flows around rotating black holes with shocks
Amit Kumar, Sayan Chakrabarti, Santabrata Das
We investigate the relativistic, viscous, advective, neutrino-dominated accretion flows (NDAFs) around rotating stellar mass black holes, incorporating neutrino cooling. By adoptin…
Shadows of generalised Hayward spacetimes : in vacuum and with plasma
Suvikranth Gera, Saurabh Kumar, Poulami Dutta Roy +1
We investigate the shadow properties of a wide class of spacetimes arising from different parameter regimes of the generalized Hayward metric, characterized by two independent para…
Observational signatures of Rotating compact objects in Plasma space-time
Saurabh Kumar, Akhil Uniyal, Sayan Chakrabarti
We have investigated the characteristics of shadows cast by the Kerr black hole in the presence of plasma and compared them to those of a rotating wormhole in a uniform plasma spac…
Effect of temperature on measurement of fundamental constants using white dwarfs in Gaia-EDR3 survey
Akhil Uniyal, Surajit Kalita, Sayan Chakrabarti
Fundamental constants are crucial for comprehending physical mechanisms, but their measurements contain uncertainties due to experimental limitations. We investigate the impact of…
Study of relativistic accretion flow in the theory of gravity
Akhil Uniyal, Sayan Chakrabarti, Santabrata Das
We present the properties of relativistic, inviscid, low angular momentum, advective accretion flow in a gravity theory that satisfactorily mimics the asymptotically flat va…