Abhirup Ghosh
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View article: Wearable Iot Technology: Unveiling the Smart Hat
Wearable Iot Technology: Unveiling the Smart Hat Open
View article: A meta inspiral-merger-ringdown consistency test of general relativity with gravitational wave signals from compact binaries
A meta inspiral-merger-ringdown consistency test of general relativity with gravitational wave signals from compact binaries Open
The observation of gravitational waves from compact binary coalescences is a promising tool to test the validity of general relativity (GR) in a highly dynamical strong-field regime. There are now a variety of tests of GR performed on the …
View article: Tests of general relativity in the nonlinear regime: A parametrized plunge-merger-ringdown gravitational waveform model
Tests of general relativity in the nonlinear regime: A parametrized plunge-merger-ringdown gravitational waveform model Open
The plunge-merger stage of the binary-black hole coalescence, when the bodies' velocities reach a large fraction of the speed of light and the gravitational-wave luminosity peaks, provides a unique opportunity to probe gravity in the dynam…
View article: Black-hole ringdown as a probe of higher-curvature gravity theories
Black-hole ringdown as a probe of higher-curvature gravity theories Open
Detecting gravitational waves from coalescing compact binaries allows us to explore the dynamical, nonlinear regime of general relativity and constrain modifications to it. Some of the gravitational-wave events observed by the LIGO-Virgo C…
View article: Tests of general relativity with gravitational-wave observations using a flexible theory-independent method
Tests of general relativity with gravitational-wave observations using a flexible theory-independent method Open
We perform tests of general relativity (GR) with gravitational waves (GWs) from the inspiral stage of compact binaries using a theory-independent framework, which adds generic phase corrections to each multipole of a GR waveform model in f…
View article: Tests of general relativity in the nonlinear regime: a parametrized plunge-merger-ringdown gravitational waveform model
Tests of general relativity in the nonlinear regime: a parametrized plunge-merger-ringdown gravitational waveform model Open
The plunge-merger stage of the binary-black hole coalescence, when the bodies' velocities reach a large fraction of the speed of light and the gravitational-wave luminosity peaks, provides a unique opportunity to probe gravity in the dynam…
View article: Constraining extra dimensions using observations of black hole quasi-normal modes
Constraining extra dimensions using observations of black hole quasi-normal modes Open
The presence of extra dimensions generically modify the spacetime geometry of a rotating black hole, by adding an additional hair, besides the mass M and the angular momentum J , known as the ‘tidal charge’ parameter, $$\beta $$ . In a b…
View article: Population inference of spin-induced quadrupole moments as a probe for nonblack hole compact binaries
Population inference of spin-induced quadrupole moments as a probe for nonblack hole compact binaries Open
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…
View article: Black-hole ringdown as a probe of higher-curvature gravity theories
Black-hole ringdown as a probe of higher-curvature gravity theories Open
Detecting gravitational waves from coalescing compact binaries allows us to explore the dynamical, nonlinear regime of general relativity and constrain modifications to it. Some of the gravitational-wave events observed by the LIGO-Virgo C…
View article: Summary of Tests of General Relativity with GWTC-3
Summary of Tests of General Relativity with GWTC-3 Open
Observations of gravitational waves (GWs) by the advanced LIGO--Virgo detectors provide us with ground breaking opportunities to test predictions of Einstein's theory of general relativity (GR) in the strong field regime. In this article, …
View article: Constraining cosmological extra dimensions with gravitational wave standard sirens: From theory to current and future multimessenger observations
Constraining cosmological extra dimensions with gravitational wave standard sirens: From theory to current and future multimessenger observations Open
The propagation of gravitational waves (GWs) at cosmological distances offers a new way to test the gravitational interaction at the largest scales. Many modified theories of gravity, usually introduced to explain the observed acceleration…
View article: Tests of General Relativity with Gravitational-Wave Observations using a Flexible--Theory-Independent Method
Tests of General Relativity with Gravitational-Wave Observations using a Flexible--Theory-Independent Method Open
We perform tests of General Relativity (GR) with gravitational waves (GWs) from the inspiral stage of compact binaries using a theory-independent framework, which adds generic phase corrections to each multipole of a GR waveform model in f…
View article: Investigating the relation between gravitational wave tests of general relativity
Investigating the relation between gravitational wave tests of general relativity Open
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…
View article: Fast post-adiabatic waveforms in the time domain: Applications to compact binary coalescences in LIGO and Virgo
Fast post-adiabatic waveforms in the time domain: Applications to compact binary coalescences in LIGO and Virgo Open
We present a computationally efficient (time-domain) multipolar waveform\nmodel for quasi-circular spin-aligned compact binary coalescences. The model\ncombines the advantages of the numerical-relativity informed,\neffective-one-body (EOB)…
View article: Investigating the relation between gravitational wave tests of general relativity
Investigating the relation between gravitational wave tests of general relativity Open
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…
View article: Population inference of spin-induced quadrupole moments as a probe for non-black hole compact binaries
Population inference of spin-induced quadrupole moments as a probe for non-black hole compact binaries Open
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…
View article: Constraints on quasinormal-mode frequencies with LIGO-Virgo binary–black-hole observations
Constraints on quasinormal-mode frequencies with LIGO-Virgo binary–black-hole observations Open
The no-hair conjecture in General Relativity (GR) states that a Kerr black\nhole (BH) is completely described by its mass and spin. As a consequence, the\ncomplex quasi-normal-mode (QNM) frequencies of a binary-black-hole (BBH)\nringdown c…
View article: Bayesian inference for compact binary coalescences with <scp>bilby</scp>: validation and application to the first LIGO–Virgo gravitational-wave transient catalogue
Bayesian inference for compact binary coalescences with <span>bilby</span>: validation and application to the first LIGO–Virgo gravitational-wave transient catalogue Open
Gravitational waves provide a unique tool for observational astronomy. While the first LIGO–Virgo catalogue of gravitational-wave transients (GWTC-1) contains 11 signals from black hole and neutron star binaries, the number of observations…
View article: Testing the no-hair nature of binary black holes using the consistency of multipolar gravitational radiation
Testing the no-hair nature of binary black holes using the consistency of multipolar gravitational radiation Open
Gravitational-wave (GW) observations of binary black holes offer the best probes of the relativistic, strong-field regime of gravity. Gravitational radiation in the leading order is quadrupolar. However, nonquadrupole (higher order) modes …
View article: A no-hair test for binary black holes
A no-hair test for binary black holes Open
One of the consequences of the black-hole “no-hair” theorem in general relativity (GR) is that gravitational radiation (quasinormal modes) from a perturbed Kerr black hole is uniquely determined by its mass and spin. Thus, the spectrum of …
View article: Effectiveness and efficiency of two distinct mechanisms for take-off in a derbid planthopper insect
Effectiveness and efficiency of two distinct mechanisms for take-off in a derbid planthopper insect Open
Analysis of the kinematics of take-off in the planthopper Proutista moesta (Hemiptera, Fulgoroidea, family Derbidae) from high speed videos showed that individual insects used two distinct mechanisms involving different appendages. The fir…
View article: Testing general relativity using gravitational wave signals from the inspiral, merger and ringdown of binary black holes
Testing general relativity using gravitational wave signals from the inspiral, merger and ringdown of binary black holes Open
Advanced LIGO's recent observations of gravitational waves (GWs) from merging binary black holes have opened up a unique laboratory to test general relativity (GR) in the highly relativistic regime. One of the tests used to establish the c…
View article: Parameter Estimation in Models with Complex Dynamics
Parameter Estimation in Models with Complex Dynamics Open
Mathematical models of real life phenomena are highly nonlinear involving multiple parameters and often exhibiting complex dynamics. Experimental data sets are typically small and noisy, rendering estimation of parameters from such data un…
View article: Testing general relativity using golden black-hole binaries
Testing general relativity using golden black-hole binaries Open
The coalescences of stellar-mass black-hole binaries through their inspiral, merger, and ringdown are among the most promising sources for ground-based gravitational-wave (GW) detectors. If a GW signal is observed with sufficient signal-to…