180 citations · 771 across the 27 of their papers we have counts for
27 papers
Gravitational physics in the context of Indian astronomy: A vision document
P. Ajith, K. G. Arun, Sukanta Bose +13
Contributions from the Indian gravity community have played a significant role in shaping several branches of astronomy and astrophysics. This document reviews some of the most imp…
Possible Causes of False General Relativity Violations in Gravitational Wave Observations
Anuradha Gupta, K. G. Arun, Enrico Barausse +40
General relativity (GR) has proven to be a highly successful theory of gravity since its inception. The theory has thrivingly passed numerous experimental tests, predominantly in w…
Do black holes remember what they are made of?
Harshraj Bandyopadhyay, David Radice, Aviral Prakash +4
We study the ringdown signal of black holes formed in prompt-collapse binary neutron star mergers. We analyze data from numerical relativity simulations. We show that the $(\e…
Detectability of QCD phase transitions in binary neutron star mergers: Bayesian inference with the next generation gravitational wave detectors
Aviral Prakash, Ish Gupta, Matteo Breschi +5
We study the detectability of postmerger QCD phase transitions in neutron star binaries with next-generation gravitational-wave detectors Cosmic Explorer and Einstein Telescope. We…
Numerical Relativity Estimates of the Remnant Recoil Velocity in Binary Neutron Star Mergers
Sumeet Kulkarni, Surendra Padamata, Anuradha Gupta +2
We present, for the first time, recoil velocity estimates for binary neutron star mergers using data from numerical relativity simulations. We find that binary neutron star merger…
Characterizing Gravitational Wave Detector Networks: From A to Cosmic Explorer
Ish Gupta, Chaitanya Afle, K. G. Arun +44
Gravitational-wave observations by the Laser Interferometer Gravitational-Wave Observatory (LIGO) and Virgo have provided us a new tool to explore the Universe on all scales from n…
The Accuracy of Neutron Star Radius Measurement with the Next Generation of Terrestrial Gravitational-Wave Observatories
Rachael Huxford, Rahul Kashyap, Ssohrab Borhanian +3
In this paper, we explore the prospect for improving the measurement accuracy of masses and radii of neutron stars. We consider imminent and long-term upgrades of the Laser Interfe…
Cosmic Explorer: A Submission to the NSF MPSAC ngGW Subcommittee
Matthew Evans, Alessandra Corsi, Chaitanya Afle +73
Gravitational-wave astronomy has revolutionized humanity's view of the universe, a revolution driven by observations that no other field can make. This white paper describes an obs…
Prospects for Direct Detection of Black Hole Formation in Neutron Star Mergers with Next-Generation Gravitational-Wave Detectors
Arnab Dhani, David Radice, Jan Schütte-Engel +5
A direct detection of black hole formation in neutron star mergers would provide invaluable information about matter in neutron star cores and finite temperature effects on the nuc…
Snowmass 2021 Cosmic Frontier White Paper: The Dense Matter Equation of State and QCD Phase Transitions
Slavko Bogdanov, Emmanuel Fonseca, Rahul Kashyap +26
Our limited understanding of the physical properties of matter at ultra-high density, high proton/neutron number asymmetry, and low temperature is presently one of the major outsta…
Systematic errors due to quasi-universal relations in binary neutron stars and their correction for unbiased model selection
Rahul Kashyap, Arnab Dhani, Bangalore Sathyaprakash
Inference of the equation-of-state (EoS) of dense nuclear matter in neutron-star cores is a principal science goal of X-ray and gravitational-wave observations of neutron stars. In…
3D Hydrodynamical Simulations of Helium-Ignited Double-degenerate White Dwarf Mergers
Niranjan Roy, Vishal Tiwari, Alexey Bobrick +6
The origins of type Ia supernovae (SNe Ia) are still debated. Some of the leading scenarios involve a double detonation in double white dwarf (WD) systems. In these scenarios, heli…
Probing the incompressibility of nuclear matter at ultra-high density through the prompt collapse of asymmetric neutron star binaries
A. Perego, D. Logoteta, D. Radice +5
Using 250 neutron star merger simulations with microphysics, we explore for the first time the role of nuclear incompressibility in the prompt collapse threshold for binaries with…
Radiation hydrodynamics modeling of kilonovae with SNEC
Zhenyu Wu, Giacomo Ricigliano, Rahul Kashyap +2
We develop a method to compute synthetic kilonova light curves that combines numerical relativity simulations of neutron star mergers and the radiation-hydrodynamic…
Numerical relativity simulations of prompt collapse mergers: threshold mass and phenomenological constraints on neutron star properties after GW170817
Rahul Kashyap, Abhishek Das, David Radice +10
We determine the threshold mass for prompt (no bounce) black hole formation in equal-mass neutron star (NS) mergers using a new set of 227 numerical relativity simulations. We cons…
A Horizon Study for Cosmic Explorer: Science, Observatories, and Community
Matthew Evans, Rana X Adhikari, Chaitanya Afle +29
This Horizon Study describes a next-generation ground-based gravitational-wave observatory: Cosmic Explorer. With ten times the sensitivity of Advanced LIGO, Cosmic Explorer will p…
Signatures of deconfined quark phases in binary neutron star mergers
Aviral Prakash, David Radice, Domenico Logoteta +6
(abridged) We investigate the quark deconfinement phase transition in the context of binary neutron star (BNS) mergers. We employ a new finite-temperature composition-dependent equ…
Are rare rogue fluctuations generic to strongly nonlinear and non-integrable systems?
Rahul Kashyap, Surajit Sen
Extensive dynamical simulations are used to explore the possible existence of sudden sufficiently large energy or rogue fluctuations (RF) at late times and across short time window…
The Differences between Analytical and Numerical Ignition Curve of He-C-O Mixture
Rahul Kashyap
In this paper, we use large reaction networks to find ignition conditions of single-zone nuclear fuel with compositions typical of white dwarf (WD) matter. The necessary but, possi…
Can Kilonova Light curves be Standardized?
Rahul Kashyap, Gayathri Raman, Parameswaran Ajith
Binary neutron star mergers have been recently confirmed to be the progenitors of the optical transients kilonovae (KNe). KNe are powered by the radioactive decay of neutron-rich e…
Double-Degenerate Carbon-Oxygen and Oxygen-Neon White Dwarf Mergers: A New Mechanism for Faint and Rapid Type Ia Supernovae
Rahul Kashyap, Tazkera Haque, Pablo Lorén-Aguilar +2
Type Ia supernovae (SNe Ia) originate from the thermonuclear explosion of carbon-oxygen white dwarfs (CO WDs), giving rise to luminous optical transients. A relatively common varie…
Constraining black hole mimickers with gravitational wave observations
Nathan K. Johnson-McDaniel, Arunava Mukherjee, Rahul Kashyap +3
LIGO and Virgo have recently observed a number of gravitational wave (GW) signals that are fully consistent with being emitted by binary black holes described by general relativity…
PULSEDYN - A dynamical simulation tool for studying strongly nonlinear chains
Rahul Kashyap, Surajit Sen
We introduce PULSEDYN, a particle dynamics program in , to solve many-body nonlinear systems in one dimension. PULSEDYN is designed to make computing accessible to non-special…
Constraining The Single-Degenerate Channel of Type Ia Supernovae With Stable Iron-Group Elements in SNR 3C 397
Pranav Dave, Rahul Kashyap, Robert Fisher +3
Recent Suzaku X-ray spectra of SNR 3C 397 indicate enhanced stable iron-group element abundances of Ni, Mn, Cr, and Fe. Seeking to address key questions about the progenitor and ex…