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Superradiant instabilities of massive bosons around exotic compact objects
Lihang Zhou, Richard Brito, Zhan-Feng Mai +1
Superradiantly unstable ultralight particles around a classical rotating black hole (BH) can form an exponentially growing bosonic cloud, which have been shown to provide an astrop…
Classical radiation fields for scalar, electromagnetic, and gravitational waves with spacetime-symmetry breaking
Quentin G. Bailey, Alexander S. Gard, Nils A. Nilsson +2
An effective field theory framework is used to investigate some Lorentz-violating effects on the generation of electromagnetic and gravitational waves, complementing previous work…
Upgraded waveform model of eccentric binary black hole based on effective-one-body-numerical-relativity for spin-aligned binary black holes
Xiaolin Liu, Zhoujian Cao, Lijing Shao
Effective one body numerical relativity waveform models for spin aligned binary black holes (SEOBNR) are based on the effective one body theoretical framework and numerical relativ…
Extended thermodynamics of the bumblebee black holes
Zhan-Feng Mai, Rui Xu, Dicong Liang +1
As a vector-tensor theory including nonminimal coupling between the Ricci tensor and a vector field, the bumblebee gravity is a potential theory to test Lorentz symmetry violation.…
Bumblebee black holes in light of Event Horizon Telescope observations
Rui Xu, Dicong Liang, Lijing Shao
We report the existence of novel static spherical black-hole solutions in a vector-tensor gravitational theory called the bumblebee gravity model which extends the Einstein-Maxwell…
Probing vector hair of black holes with extreme mass ratio inspirals
Dicong Liang, Rui Xu, Zhan-Feng Mai +1
The bumblebee gravity model, with a vector field nonminimally coupled to gravity, is a natural extension of the Einstein-Maxwell theory. In this theory, a black hole can carry a ve…
Search for anisotropic, birefringent spacetime-symmetry breaking in gravitational wave propagation from GWTC-3
Leïla Haegel, Kellie O'Neal-Ault, Quentin G. Bailey +3
An effective field theory framework, the Standard-Model Extension, is used to investigate the existence of Lorentz and CPT-violating effects during gravitational wave propagation.…
Neutron stars as extreme laboratories for gravity tests
Lijing Shao, Kent Yagi
Neutron stars are versatile in their application to studying various important aspects of fundamental physics, in particular strong-field gravity tests and the equation of state fo…
Static spherical vacuum solutions in the bumblebee gravity model
Rui Xu, Dicong Liang, Lijing Shao
The bumblebee gravity model is a vector-tensor theory of gravitation where the vector field nonminimally couples to the Ricci tensor. By investigating the vacuum field equations wi…
Simultaneous bounds on the gravitational dipole radiation and varying gravitational constant from compact binary inspirals
Ziming Wang, Junjie Zhao, Zihe An +2
Compact binaries are an important class of gravitational-wave (GW) sources that can be detected by current and future GW observatories. They provide a testbed for general relativit…
Gravity Tests with Radio Pulsars in Perturbative and Nonperturbative Regimes
Lijing Shao
Searches for empirical clues beyond Einstein's general relativity (GR) are crucial to understand gravitation and spacetime. Radio pulsars have been playing an important role in tes…
Polarizations of Gravitational Waves in the Bumblebee Gravity Model
Dicong Liang, Rui Xu, Xuchen Lu +1
Lorentz violation modifies the dispersion relation of gravitational waves (GWs), and induces birefringence and anisotropy in propagation. Our study shows that Lorentz violation can…
Radio Pulsars as a Laboratory for Strong-field Gravity Tests
Lijing Shao
General relativity offers a classical description to gravitation and spacetime, and is a cornerstone for modern physics. It has passed a number of empirical tests with flying colou…
Oscillation Modes and Gravitational Waves from Strangeon Stars
Hong-Bo Li, Yong Gao, Lijing Shao +2
The strong interaction at low energy scales determines the equation of state (EOS) of supranuclear matters in neutron stars (NSs). It is conjectured that the bulk dense matter may…
New Horizons for Fundamental Physics with LISA
K. G. Arun, Enis Belgacem, Robert Benkel +138
The Laser Interferometer Space Antenna (LISA) has the potential to reveal wonders about the fundamental theory of nature at play in the extreme gravity regime, where the gravitatio…
Cosmology of Dirac-Born-Infeld dRGT massive gravity
Sobhan Kazempour, Amin Rezaei Akbarieh, Hossein Motavalli +1
We introduce the cosmological analysis of the Dirac-Born-Infeld dRGT massive gravity theory which is a new extension of de Rham-Gabadadze-Tolley (dRGT) massive gravity. In this the…
Extending the Fisher Information Matrix in Gravitational-wave Data Analysis
Ziming Wang, Chang Liu, Junjie Zhao +1
The Fisher information matrix (FM) plays an important role in forecasts and inferences in many areas of physics. While giving fast parameter estimation with the Gaussian likelihood…
Cosmology and perturbations in tachyonic massive gravity
Amin Rezaei Akbarieh, Sobhan Kazempour, Lijing Shao
As massive gravity and its extensions offer physically well-defined gravitational theories with a nonzero graviton mass, we present a new extension of the de Rham-Gabadadze-Tolley…
Astrophysics with the Laser Interferometer Space Antenna
Pau Amaro Seoane, Jeff Andrews, Manuel Arca Sedda +156
The Laser Interferometer Space Antenna (LISA) will be a transformative experiment for gravitational wave astronomy, and, as such, it will offer unique opportunities to address many…
Neutron stars in massive scalar-Gauss-Bonnet gravity: Spherical structure and time-independent perturbations
Rui Xu, Yong Gao, Lijing Shao
The class of scalar-tensor theories with the scalar field coupling to the Gauss-Bonnet invariant has drawn great interest since solutions of spontaneous scalarization were found fo…
Legacy of the First Workshop on Gravitational Wave Astrophysics for Early Career Scientists
Jean-Baptiste Bayle, Béatrice Bonga, Daniela Doneva +15
Gravitational wave science is a dynamical, fast-expanding research field founded on results, tools and methodologies drawn from different research areas and communities. Early care…
The Next Generation Global Gravitational Wave Observatory: The Science Book
Vicky Kalogera, B. S. Sathyaprakash, Matthew Bailes +88
The next generation of ground-based gravitational-wave detectors will observe coalescences of black holes and neutron stars throughout the cosmos, thousands of them with exceptiona…
Rotation and deformation of strangeon stars in the Lennard-Jones model
Yong Gao, Xiao-Yu Lai, Lijing Shao +1
The strong interactions at low energy scales determine the state of the supranuclear matter in the pulsar-like compact objects. It is proposed that the bulk strong matter could be…
Scalarized neutron stars in massive scalar-tensor gravity: X-ray pulsars and tidal deformability
Zexin Hu, Yong Gao, Rui Xu +1
Neutron stars (NSs) in scalar-tensor theories of gravitation with the phenomenon of spontaneous scalarization can develop significant deviations from general relativity. Cases with…