Zobrazeno 1 - 10
of 77
pro vyhledávání: '"Bhattacharjee, Srijit"'
We study supertranslations at spatial and future timelike infinity in the first-order formalism. We relax the Ashtekar-Engle-Sloan boundary conditions to allow supertranslations at the spatial infinity and obtain the precise form of the tetrads and L
Externí odkaz:
http://arxiv.org/abs/2409.01783
The memory effect, in the context of gravitational-waves (GWs), manifests itself in the permanent relative displacement of test masses when they encounter the GWs. A number of works have explored the possibility of detecting the memory when the sourc
Externí odkaz:
http://arxiv.org/abs/2406.15604
We study the soft theorems for photons and gravitons at finite temperatures using the thermofield dynamics approach. The soft factors lose universality at finite temperatures as the soft amplitudes depend on the nature (or spin) of the particles part
Externí odkaz:
http://arxiv.org/abs/2308.02445
Autor:
Tarafdar, Ayon, Bhattacharjee, Srijit
We study event horizon candidates for slowly evolving dynamical black holes in General Relativity and Einstein-Gauss-Bonnet (EGB) gravity. Such a type of horizon candidate has been termed as slowly evolving null surface (SENS). It signifies a near-eq
Externí odkaz:
http://arxiv.org/abs/2210.15246
We attempt to address the question of whether standard tests of general relativity can detect the presence of a black hole carrying a supertranslation field. In this regard, we study the photon sphere of a dynamical black hole carrying a supertransla
Externí odkaz:
http://arxiv.org/abs/2110.03547
Publikováno v:
Phys. Rev. D 103, 024008 (2021)
We study linear scalar perturbations of black holes in two-dimensional (2D) gravity models with a particular emphasis on Jackiw-Teitelboim (JT) gravity. We obtain an exact expression of the quasinormal mode frequencies for single horizon black holes
Externí odkaz:
http://arxiv.org/abs/2011.08179
Publikováno v:
JHEP 03 (2021) 134
We study the displacement memory effect and its connection with the extended-BMS symmetries near the horizon of black holes. We show there is a permanent shift in the geodesic deviation vector relating two nearby timelike geodesics placed close to th
Externí odkaz:
http://arxiv.org/abs/2010.16086
Publikováno v:
Phys. Rev. D 102, 044030 (2020)
We study the phenomena of mass inflation using the Ori model for a rotating BTZ black hole that is sufficiently far from extremality, and show that the right Cauchy horizon ($\mathcal{CH}^+_R$) of the BTZ black hole becomes singular. Motivated by the
Externí odkaz:
http://arxiv.org/abs/2005.09705
Autor:
Bhattacharjee, Srijit, Kumar, Shailesh
Publikováno v:
Phys. Rev. D 102, 044041 (2020)
We study horizon shells and soldering freedom for extreme black holes and how supertranslation-like Bondi-Metzner-Sachs (BMS) symmetries appear as soldering transformations. Further, for a null shell placed infinitesimally close to the horizon of an
Externí odkaz:
http://arxiv.org/abs/2003.09334
Publikováno v:
Phys. Rev. D 100, 084010 (2019)
Cataclysmic astrophysical phenomena can produce impulsive gravitational waves that can possibly be detected by the advanced versions of present-day detectors in the future. Gluing of two spacetimes across a null surface produces impulsive gravitation
Externí odkaz:
http://arxiv.org/abs/1905.12905