Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Ghosh, Shubhrangshu"'
Weyl's conformal gravity theory, which is considered as a compelling alternative to general relativity theory, has been claimed to describe the observed flat rotation curve feature of spiral galaxies without the need of invoking dark matter. However,
Externí odkaz:
http://arxiv.org/abs/2306.01345
Autor:
Ghosh, Shubhrangshu, Mitra, Pralay
Publikováno v:
In Computer Methods and Programs in Biomedicine February 2024 244
Isolated massive elliptical galaxies, or that are present at the center of cool-core clusters, are believed to be powered by hot gas accretion directly from their surrounding hot X-ray emitting gaseous medium. This leads to a giant Bondi-type spheric
Externí odkaz:
http://arxiv.org/abs/2103.15508
Accretion on length-scales of interstellar or even intergalactic is particularly relevant, in the context of spherical or quasi-spherical hot mode accretion, supposedly powering low excitation radio galaxies in the maintenance-mode feedback paradigm.
Externí odkaz:
http://arxiv.org/abs/1905.08567
Publikováno v:
Astrophys.J, 828, 6 (2016)
We construct a self-consistent relativistic Newtonian analogue corresponding to gravitational static spherical symmetric spacetime geometries, staring directly from a generalized scalar relativistic gravitational action in Newtonian framework, which
Externí odkaz:
http://arxiv.org/abs/1701.05745
Autor:
Ghosh, Shubhrangshu
Publikováno v:
RAA 17: 104 (26pp) , 2017
The correlated and coupled dynamics of accretion and outflow around black holes (BHs) are essentially governed by the fundamental laws of conservation as outflow extracts matter, momentum and energy from the accretion region. Here we analyzed a robus
Externí odkaz:
http://arxiv.org/abs/1611.02414
The effects of several dark energy models on gravitational time delay of particles with non-zero mass are investigated and analytical expressions for the same are obtained at the first order accuracy. Also the expression for gravitational time delay
Externí odkaz:
http://arxiv.org/abs/1603.04063
Publikováno v:
Physical Review D 92, 083010 (2015)
We formulate a generic Newtonian like analogous potential for static spherically symmetric general relativistic (GR) spacetime, and subsequently derived proper Newtonian like analogous potential corresponding to Janis-Newman-Winicour (JNW) and Reissn
Externí odkaz:
http://arxiv.org/abs/1511.02009
Based on the conserved Hamiltonian for a test particle, we have formulated a Newtonian analogue of Kerr spacetime in the `low energy limit of the test particle motion' that, in principle, can be comprehensively used to describe general relativistic (
Externí odkaz:
http://arxiv.org/abs/1410.7900
Publikováno v:
Physical Review D, Volume 90, Issue 6, id.063008, 2014
The late time accelerated expansion of the Universe demands that even in local galactic-scales it is desirable to study astrophysical phenomena, particularly relativistic accretion related phenomena in massive galaxies or in galaxy mergers and the dy
Externí odkaz:
http://arxiv.org/abs/1410.7132