8 papers
GRMHD accretion beyond the black hole paradigm: Light from within the shadow
Saurabh, Maciek Wielgus, Parth Bambhaniya +3
We present the first three-dimensional general relativistic magnetohydrodynamic simulation of sustained accretion onto a horizonless singularity in which matter reaches the central…
High-Energy Extractions from Horizonless Compact Objects
Parth Bambhaniya, Elisabete M. de Gouveia Dal Pino
High-energy astrophysical sources such as active galactic nuclei, quasars, X-ray binaries, and gamma-ray bursts are powered by mechanisms that convert gravitational or rotational e…
Quasinormal Modes and Stability Analysis of the JMN-1 Naked Singularity
Akshat Pathrikar, Parth Bambhaniya, Pankaj S. Joshi +1
In this paper, we perform a comprehensive analysis of the quasinormal modes in an external geometry of the Joshi-Malafarina-Narayan (JMN-1) naked singularity by investigating its r…
Shadow Formation Conditions Beyond the Kerr Black Hole Paradigm
Parth Bambhaniya, Saurabh, Elisabete M. de Gouveia Dal Pino
A compact object illuminated by background radiation produces a dark silhouette. The edge of the silhouette or shadow (alternatively, the apparent boundary or the critical curve) i…
Time Delay of Pulsar Signals in Astrophysical Black Hole Spacetimes
Parth Bambhaniya, Viraj Kalsariya, Saurabh +4
In this paper, we investigate the fully relativistic time delay of pulsar signals propagating in the vicinity of a rotating black hole and its potential mimickers, including a defo…
High Energy Particle Collisions in the vicinity of Naked Singularity
Kauntey Acharya, Parth Bambhaniya, Pankaj S. Joshi +2
In this paper, we investigate particle acceleration and high-energy collisions in the Joshi-Malafarina-Narayan (JMN-1) naked singularity, which, in the absence of an event horizon,…