4 papers
Relativistic Accretion Flow in a Generic Class of Spherically Symmetric Static Spacetime
Pradeepkumar Yadav, Sayan Chakrabarti, Santabrata Das
We investigate the properties of low angular momentum, inviscid, advective accretion flows in a generic static and spherically symmetric spacetime that incorporates higher-order co…
Perturbations in the parametrized wormhole spacetime and their related quasinormal modes
Shauvik Biswas, Sayan Chakrabarti
We study electromagnetic perturbations and the associated quasinormal modes (QNMs) of parametrized static, spherically symmetric wormhole spacetimes, focusing on Damour-Solodukhin…
Exploring velocity dispersion anisotropy in a dark matter dominated ultra-diffuse galaxy with modified gravity models
Esha Bhatia, Sayan Chakrabarti, Sovan Chakraborty
The kinematics of the ultra-diffuse galaxy (UDG) NGC1052-DF44 is primarily influenced by the presence of dark matter (DM). In this paper, we conduct a contrasting kinematic study o…
Phenomenology of renormalization group improved gravity from the kinematics of SPARC galaxies
Esha Bhatia, Sayan Chakrabarti, Sovan Chakraborty
Renormalization Group correction to General Relativity (RGGR) proposes a logarithmic running of the gravitational coupling , resulting in a modified description of…