Explanipedia

Testing general relativity with gravitational waves -- improving and extending Modified Dispersion Relation tests Open

Tomasz Baka, B. Cirok, K. Haris, Johannes Noller, N. V. Krishnendu · 2025

Searching for a modified dispersion relation is one of the general relativity tests performed by the LIGO-Virgo-KAGRA collaboration with each new cumulative Gravitational Wave Transient Catalog (GWTC). It considers classes of theories that…

Testing the nature of compact objects in the lower mass gap using gravitational wave observations Open

N. V. Krishnendu, F. Ohme, K. G. Arun · 2025

As the compact binary catalog continues to grow rapidly, developing and refining tests to probe the nature of compact objects is essential for a comprehensive understanding of both the observed data and the underlying astrophysics of the b…

Probing the existence of a minimal length through compact binary inspiral Open

N. V. Krishnendu, Aldo Perri, Sumanta Chakraborty, A. Pesci · 2025

Existence of a minimal length in spacetime geometries avoids several singular situations involving quantum theory and gravity. In this work, we show that the existence of such a minimal length also affects the gravitational wave (GW) wavef…

Probing black hole charge from the binary black hole inspiral Open

N. V. Krishnendu, Sumanta Chakraborty · 2024

Recent gravitational wave (GW) observations have enabled us to look beyond\nthe standard paradigm of gravitational physics, namely general relativity (GR).\nAlong with the mass and the angular momentum, which typical astrophysical black\nh…

Erratum: Distinguishing binary black hole precessional morphologies with gravitational wave observations [Phys. Rev. D 108, 103003 (2023)] Open

Nathan K. Johnson-McDaniel, K. S. Phukon, N. V. Krishnendu, Anuradha Gupta · 2024

Received 15 May 2024DOI:https://doi.org/10.1103/PhysRevD.109.129903© 2024 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasGravitational wave sourcesGravitational wavesPhysical SystemsAstronomical black holesBinary st…

Testing Gravity with Binary Black Hole Gravitational Waves Open

M. Colleoni, N. V. Krishnendu, Pierre Mourier, Sayantani Bera, Xisco Jiménez-Forteza · 2024

General Relativity (GR) remains the most accurate theory of gravity to date. It has passed many experimental tests in the Solar System as well as binary pulsar, cosmological and gravitational-wave (GW) observations. Some of these tests pro…

Inferring spin tilts of binary black holes at formation with plus-era gravitational wave detectors Open

Sumeet Kulkarni, Nathan K. Johnson-McDaniel, K. S. Phukon, N. V. Krishnendu, Anuradha Gupta · 2024

The spin orientations of spinning binary black hole (BBH) mergers detected by ground-based gravitational wave detectors such as LIGO and Virgo can provide important clues about the formation of such binaries. However, these spin tilts, i.e…

Unveiling Microlensing Biases in Testing General Relativity with Gravitational Waves Open

Anuj Mishra, N. V. Krishnendu, A. Ganguly · 2023

Gravitational waves (GW) from chirping binary black holes (BBHs) provide unique opportunities to test general relativity (GR) in the strong-field regime. However, testing GR can be challenging when incomplete physical modeling of the expec…

Effect of double spin-precession and higher harmonics on spin-induced quadrupole moment measurements Open

Divyajyoti, N. V. Krishnendu, M. Saleem, M. Colleoni, A. Vijaykumar , et al. · 2023

We investigate the prospect of performing a null test of binary black hole (BBH) nature using spin-induced quadrupole moment (SIQM) measurements. This is achieved by constraining a deviation parameter ($δκ$) related to the parameter ($κ$) …

Constraining the nature of dark compact objects with spin-induced octupole moment measurement Open

Pankaj Saini, N. V. Krishnendu · 2023

Various theoretical models predict the existence of exotic compact objects that can mimic the properties of black holes (BHs). Gravitational waves (GWs) from the mergers of compact objects have the potential to distinguish between exotic c…

Constraining mass of the graviton with GW170817 Open

Andrey A. Shoom, S. Kumar, N. V. Krishnendu · 2022

We consider the massive graviton phenomenological model based on the graviton's dispersion terms included into phase of gravitational wave's waveform. Such model was already considered in many works but it was based on a single leading-ord…

Population inference of spin-induced quadrupole moments as a probe for nonblack hole compact binaries Open

M. Saleem, N. V. Krishnendu, Abhirup Ghosh, Anuradha Gupta, W. Del Pozzo , et al. · 2022

Gravitational-wave (GW) measurements of physical effects such as spin-induced quadrupole moments can distinguish binaries consisting of black holes from non-black hole binaries. While these effects may be poorly constrained for single-even…

Interplay of spin-precession and higher harmonics in the parameter estimation of binary black holes Open

N. V. Krishnendu, F. Ohme · 2022

Gravitational-wave (GW) signals from coalescing compact binaries carry\nenormous information about the source dynamics and are an excellent tool to\nprobe unknown astrophysics and fundamental physics. Though the updated catalog\nof compact…

Investigating the relation between gravitational wave tests of general relativity Open

Nathan K. Johnson-McDaniel, Abhirup Ghosh, S. Ghonge, M. Saleem, N. V. Krishnendu , et al. · 2022

This data release accompanies the paper Johnson-McDaniel et al., Investigating the relation between gravitational wave tests of general relativity, arXiv:2109.06988. It provides the frame files containing the simulated observations of GR a…

Testing General Relativity with Gravitational Waves: An Overview Open

N. V. Krishnendu, F. Ohme · 2021

The detections of gravitational-wave (GW) signals from compact binary coalescence by ground-based detectors have opened up the era of GW astronomy. These observations provide opportunities to test Einstein’s general theory of relativity at…

Investigating the relation between gravitational wave tests of general relativity Open

Nathan K. Johnson-McDaniel, Abhirup Ghosh, S. Ghonge, M. Saleem, N. V. Krishnendu , et al. · 2021

This data release accompanies the paper Johnson-McDaniel et al., Investigating the relation between gravitational wave tests of general relativity, arXiv:2109.06988. It provides the frame files containing the simulated observations of GR a…

Population inference of spin-induced quadrupole moments as a probe for non-black hole compact binaries Open

M. Saleem, N. V. Krishnendu, Abhirup Ghosh, Anuradha Gupta, W. Del Pozzo , et al. · 2021

Gravitational-wave (GW) measurements of physical effects such as spin-induced quadrupole moments can distinguish binaries consisting of black holes from non-black hole binaries. While these effects may be poorly constrained for single-even…

The interplay of spin-precession and higher harmonics in the parameter estimation of binary black holes Open

N. V. Krishnendu, F. Ohme · 2021

The data release associated with the paper The interplay of spin-precession and higher harmonics in the parameter estimation of binary black holes. This data release includes posterior samples used to produced various data…

Testing the Kerr nature of supermassive and intermediate-mass black hole binaries using spin-induced multipole moment measurements Open

N. V. Krishnendu, A. B. Yelikar · 2020

The gravitational wave measurements of spin-induced multipole moment coefficients of a binary black hole system can be used to distinguish black holes from other compact objects [N. V. Krishnendu et al., PRL 119, 091101 (2017)]. Here, we a…

Testing the Kerr nature of intermediate-mass and supermassive black hole binaries using spin-induced multipole moment measurements Open

N. V. Krishnendu, A. B. Yelikar · 2019

The gravitational wave measurements of spin-induced multipole moment coefficients of a binary black hole system can be used to distinguish black holes from other compact objects [N. V. Krishnendu et al., PRL 119, 091101 (2017)]. Here, we a…

Spin-induced deformations and tests of binary black hole nature using third-generation detectors Open

N. V. Krishnendu, C. Mishra, K. G. Arun · 2019

In a recent letter [N. V. Krishnendu et al., PRL 119, 091101 (2017)] we explored the possibility of probing the binary black hole nature of coalescing compact binaries, by measuring their spin-induced multipole moments, observed in advance…

Testing the Binary Black Hole Nature of a Compact Binary Coalescence Open

N. V. Krishnendu, K. G. Arun, C. Mishra · 2017

We propose a novel method to test the binary black hole nature of compact binaries detectable by gravitational wave (GW) interferometers and, hence, constrain the parameter space of other exotic compact objects. The spirit of the test lies…

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