29 citations · 82 across the 28 of their papers we have counts for
24 papers · 1 filter
Nonlinear Perturbations of Relativistic Stars
K. J. Kwon, Abhishek Hegade K. R., Tejaswi Venumadhav +2
We extend the general relativistic Lagrangian perturbation formalism of Friedman and Schutz [Astrophys. J. 200, 204 (1975)] beyond linear order, retaining full time dependence of t…
Hybrid-star asteroseismology across sharp phase interfaces: Slow and rapid conversion in the - and -mode spectra
Zoey Zhiyuan Dong, Hao-Jui Kuan, Nicolas Yunes
First-order phase transitions in neutron-star interiors can leave signatures in the polar quasi-normal-mode spectrum. We compute the complex quadrupolar - and -mode spectra…
A New Spin on Dissipative Tides: First-Post-Newtonian Effects in Compact Binary Inspirals
Anand Balivada, Abhishek Hegade K. R., Nicolás Yunes
Tidal dissipation in spinning compact binaries imprints characteristic corrections on the late-inspiral gravitational-wave signal. We develop a next-to-leading order post-Newtonian…
Donutization Inside Neutron Stars: Shell-Localized Scalar Fields
Hao-Jui Kuan, Alan Tsz-Lok Lam, Jacquelyn Noronha-Hostler +1
Heavy scalar fields ( eV) in scalar-tensor gravity are expected to be hidden from neutron-star observations because their Compton wavelength is sub-stellar. We s…
Metric Reconstruction for Generic Black-Hole Perturbations
Dongjun Li, Nicolás Yunes
Standard (radiation-gauge) metric reconstruction excludes generic sources because it requires a tracefree metric perturbation. We remove this obstruction for perturbations of Petro…
The Good, the Bad, and the Subtle: Relativistic mode sums for neutron-star tidal response
Abhishek Hegade K. R., K. J. Kwon, Tejaswi Venumadhav +2
Time-dependent tidal interactions during the late inspiral of binary neutron stars encode valuable information about neutron-star structure, but systematically extending the famili…
Non-radial pulsations of gravitationally coupled two-fluid neutron stars in general relativity
Ankit Kumar, Daniel A. Caballero, Hajime Sotani +1
Non-radial oscillations of neutron stars provide a powerful probe of stellar structure and relativistic gravity, but a fully general relativistic treatment for gravitationally coup…
Beyond Three Terms: Continued Fractions for Rotating Black Holes in Modified Gravity
Georgios Karikos, Jayana A. Saes, Pratik Wagle +1
Black-hole ringdown offers a clean probe of strong gravity, but one of its most accurate tools--Leaver's continued-fraction method--requires a three-term recurrence relation. Beyon…
Quadratic gravity corrections to scalar QNMs of rapidly rotating black holes
Stef J. B. Husken, Tom van der Steen, Simon Maenaut +6
In an effective-field-theory framework for gravity, black-hole quasinormal mode spectra acquire corrections in quadratic-curvature, scalar-tensor extensions of general relativity.…
Dynamical tidal response of neutron stars as a probe of dense-matter properties
Abhishek Hegade K. R., Yumu Yang, Mauricio Hippert +3
Dynamical tidal deformations play a crucial role in the gravitational waves emitted by binary neutron star systems during their late inspiral. In this work, we systematically explo…
Impact of numerical-relativity waveform calibration on parametrized post-Einsteinian tests
Simone Mezzasoma, Carl-Johan Haster, Nicolás Yunes
Testing general relativity in the strong-field and highly dynamical regime is now possible through current gravitational-wave observations, where even a single high-quality detecti…
Systematic biases in parameter estimation on LISA binaries. II. The effect of excluding higher harmonics for spin-aligned, high-mass binaries
Sophia Yi, Francesco Iacovelli, Emanuele Berti +4
The Laser Interferometer Space Antenna (LISA) will observe massive black hole binaries (MBHBs) with astoundingly high signal-to-noise ratio, leaving parameter estimation with these…
Universal Relations with Dynamical Tides
Jayana A. Saes, Abhishek Hegade K. R., Nicolás Yunes
Observations of neutron stars and the precise measurement of their macroscopic properties have provided valuable insights into fundamental physics, both by constraining the behavio…
Neural Post-Einsteinian Test of General Relativity with the Third Gravitational-Wave Transient Catalog
Yiqi Xie, Gautham Narayan, Nicolás Yunes
Gravitational waves (GWs) from compact binaries are excellent probes of gravity in the strong- and dynamical-field regimes. We report a test of general relativity (GR) with the thi…
Neutron Star Radial Perturbations for Causal, Viscous, Relativistic Fluids
Daniel A. Caballero, Nicolás Yunes
Which of the multiple models of causal and stable relativistic viscous fluids that have been developed is best suited to describe neutron stars? The modeling of out-of-equilibrium…
Highly-accurate neutron star modeling in the Hartle-Thorne Approximation
Carlos Conde-Ocazionez, Tuojin Yin, Jaquelyn Noronha-Hostler +1
Future X-ray missions, such as NICER and LOFT, together with gravitational-wave observations from ground-based detectors, will provide new insights into neutron stars. Interpreting…
Millilensing induced systematic biases in parameterized tests of General Relativity
Anna Liu, Rohit S. Chandramouli, Otto A. Hannuksela +2
Tests of general relativity (GR) can be systematically biased when our waveform models are inaccurate. We here study systematic biases in tests of general relativity induced by neg…
Radial Mode Stability of Two-Fluid Neutron Stars
Daniel A. Caballero, Justin L. Ripley, Nicolás Yunes
Radial mode stability is a necessary condition for the astrophysical viability of compact objects. In recent years, astrophysical models with two fluids have gain popularity, espec…
Robust and improved constraints on higher-curvature gravitational effective-field-theory with the GW170608 event
Haoyang Liu, Nicolás Yunes
Effective field theory methods allow us to modify general relativity through higher-curvature corrections to the Einstein-Hilbert action, while preserving Lorentz invariance and th…
Dissipative tidal effects to next-to-leading order and constraints on the dissipative tidal deformability using gravitational wave data
Abhishek Hegade K. R., Justin L. Ripley, Nicolás Yunes
Dissipative tidal interactions can be used to probe the out-of-equilibrium physics of neutron stars using gravitational wave observations. In this paper, we present the first post-…
Neural post-Einsteinian framework for efficient theory-agnostic tests of general relativity with gravitational waves
Yiqi Xie, Deep Chatterjee, Gautham Narayan +1
The parametrized post-Einsteinian (ppE) framework and its variants are widely used to probe gravity through gravitational-wave tests that apply to a large class of theories beyond…
Dynamical tidal response of non-rotating relativistic stars
Abhishek Hegade K. R., Justin L. Ripley, Nicolás Yunes
Accurately modeling the tidal response of neutron stars is crucial to connecting gravitational wave observations of binaries to ultra-dense nuclear physics. Most current models of…
Efficient gravitational-wave model for fully-precessing and moderately-eccentric, compact binary inspirals
J. Nijaid Arredondo, Antoine Klein, Nicolás Yunes
Future gravitational-wave detectors, especially the Laser Interferometer Space Antenna (LISA), will be sensitive to black hole binaries formed in astrophysical environments that pr…
First constraint on the dissipative tidal deformability of neutron stars
Justin L. Ripley, Abhishek Hegade K. R., Rohit S. Chandramouli +1
The gravitational waves (GWs) emitted by neutron star binaries probe the physics of matter at supra nuclear densities. During the late inspiral, tidal deformations raised on each s…