68 citations · 165 across the 16 of their papers we have counts for
13 papers · 1 filter
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…
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…
Retrograde Precession of Relativistic Orbits and the Quest for Charged Black Holes
Parth Bambhaniya, Meet J. Vyas, Pankaj S. Joshi +1
The S-stars around the center of the milky way galaxy provide us with detailed information about the nature of the supermassive compact object Sagittarius A* (Sgr A*). In this work…
A Study of Black Holes and Beyond: Shadows and Relativistic Orbits
Parth Bambhaniya
This doctoral thesis is organized into seven chapters. The first chapter introduces readers to the formation of black holes and naked singularities as an end state of continuous gr…
Relativistic time delay analysis of pulsar signals near ultra-compact objects
Viraj Kalsariya, Parth Bambhaniya, Pankaj S. Joshi
The upcoming discoveries of pulsars orbiting the center of the Milky Way will present unparalleled opportunities to examine the causal structure of the spacetime geometry of Sagitt…
Tidal forces in the Simpson-Visser black-bounce and wormhole spacetimes
Dhruv Arora, Parth Bambhaniya, Dipanjan Dey +1
The concept of regular black holes has gained attention in recent years, especially in the context of quantum gravity theories. In these theories, the existence of singularities is…
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,…
Energy extraction from Janis-Newman-Winicour naked singularity
Vishva Patel, Kauntey Acharya, Parth Bambhaniya +1
In general, energy extraction methods such as the Penrose process and the magnetic Penrose process are thought to be reliant on the existence of an ergoregion. Inside an ergoregion…
Rotational energy extraction from the Kerr black hole's mimickers
Vishva Patel, Kauntey Acharya, Parth Bambhaniya +1
In this paper, the Penrose process is being used to extract rotational energy from regular black holes. Initially, we consider the rotating Simpson-Visser regular spacetime which d…
Probing the Shadow Image of the Sagittarius A* with Event Horizon Telescope
Saurabh, Parth Bambhaniya, Pankaj S. Joshi
Recent observations of the Milky-way galactic center at various frequencies suggest a supermassive compact object. Generally, that supermassive compact object is assumed to be a `B…
Shadows and precession of orbits in rotating Janis-Newman-Winicour spacetime
Divyesh N. Solanki, Parth Bambhaniya, Dipanjan Dey +2
In this paper, we construct the rotating Janis-Newman-Winicour (JNW) naked singularity spacetime using Newman-Janis Algorithm (NJA). We analyse NJA with and without complexificatio…
Thin accretion disk in the Simpson-Visser black-bounce and wormhole spacetimes
Parth Bambhaniya, Saurabh K, Kimet Jusufi +1
We compare the optical appearance of a thin accretion disk in the Simpson-Visser spacetime to the Schwarzschild black hole case in this paper. We calculate and illustrate the red-s…