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12 papers · 2 filters
Detecting Unmodeled, Source-dependent Signals in Gravitational Waves with SCoRe
Guillaume Dideron, Suvodip Mukherjee, Luis Lehner
New physics and systematic errors can lead to deviations between the models used to analyze gravitational wave data and the actual signal. Such deviations will generally be correla…
Birkhoff's Theorem and Uniqueness: A Peek Beyond General Relativity
Rajes Ghosh, Akash K Mishra, Avijit Chowdhury
In General Relativity, Birkhoff's theorem asserts that any spherically symmetric vacuum solution must be static and asymptotically flat. In this paper, we study the validity of Bir…
Connecting quasi-normal modes with causality in Lovelock theories of gravity
Avijit Chowdhury, Akash K Mishra, Sumanta Chakraborty
The eikonal correspondence between the quasi-normal modes (QNMs) of asymptotically flat static spherically symmetric black holes and the properties of unstable null circular geodes…
Worldline EFT treatment of quadratic and cubic gravity theories
Raghotham A Kulkarni, Rahul, Soham Bhattacharyya +1
This paper explores modifications to General Relativity (GR) by considering higher-order curvature terms in the gravitational action, specifically focusing on the quadratic Ricci s…
Simulating binary black hole mergers using discontinuous Galerkin methods
Geoffrey Lovelace, Kyle C. Nelli, Nils Deppe +28
Binary black holes are the most abundant source of gravitational-wave observations. Gravitational-wave observatories in the next decade will require tremendous increases in the acc…
Accelerated parameter estimation of supermassive black hole binaries in LISA using a meshfree approximation
Abhishek Sharma, Anand S. Sengupta, Suvodip Mukherjee
The Laser Interferometer Space Antenna (LISA) will be capable of detecting gravitational waves (GWs) in the milli-Hertz band. Among various sources, LISA will detect the coalescenc…
ESIGMAHM: An Eccentric, Spinning inspiral-merger-ringdown waveform model with Higher Modes for the detection and characterization of binary black holes
Kaushik Paul, Akash Maurya, Quentin Henry +5
We present a time-domain inspiral-merger-ringdowm (IMR) waveform model ESIGMAHM constructed within a framework we named ESIGMA for coalescing binaries of spinning black holes on mo…
Universal phenomenological relations between spherical harmonic modes in non-precessing eccentric binary black hole merger waveforms
Tousif Islam, Tejaswi Venumadhav
Using publicly available numerical relativity (NR) simulations for non-spinning eccentric binary black hole (BBH) mergers, Ref \cite{Islam:2024rhm} demonstrated that the eccentrici…
Fast marginalization algorithm for optimizing gravitational wave detection, parameter estimation and sky localization
Javier Roulet, Jonathan Mushkin, Digvijay Wadekar +3
We introduce an algorithm to marginalize the likelihood for a gravitational wave signal from a quasi-circular binary merger over its extrinsic parameters, accounting for the effect…
Fast and faithful interpolation of numerical relativity surrogate waveforms using meshfree approximation
Lalit Pathak, Amit Reza, Anand S. Sengupta
Several theoretical waveform models have been developed over the years to capture the gravitational wave emission from the dynamical evolution of compact binary systems of neutron…
GLANCE -- Gravitational Lensing Authenticator using Non-Modelled Cross-Correlation Exploration of Gravitational Wave Signals
Aniruddha Chakraborty, Suvodip Mukherjee
Gravitational lensing is the phenomenon where the presence of matter (called a lens) bends the path of light-like trajectories travelling nearby. Similar to the geometric optics li…
Inferring Binary Properties from Gravitational Wave Signals
Javier Roulet, Tejaswi Venumadhav
This review provides a conceptual and technical survey of methods for parameter estimation of gravitational wave signals in ground-based interferometers such as LIGO and Virgo. We…