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gr-qc2022★ 91 cited

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…

gr-qc2022★ 4 cited

Torsion fields generated by the quantum effects of macro-bodies

Da-Ming Chen

We generalize Einstein's General Relativity (GR) by assuming that all matter (including macro-objects) has quantum effects. An appropriate theory to fulfill this task is Gauge Theo…

gr-qc2022★ 34 cited

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.…

gr-qc2022★ 27 cited

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…

gr-qc2022★ 10 cited

Probing the Delay Time of Supermassive Black Hole Binary Mergers With Gravitational Waves

Yun Fang, Huan Yang

Merging supermassive black hole binaries is expected as a consequence of galaxy mergers, yet the detailed evolution path and underlying merging mechanisms of these binaries are sti…

gr-qc2022★ 87 cited

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…

gr-qc2022★ 13 cited

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…

gr-qc2022★ 1 cited

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…

gr-qc2022

Testing the black hole area law with Event Horizon Telescope

Deng Wang

Hawking's black hole area theorem can be tested by monitoring the evolution of a single black hole over time. Using current imaging observations of two supermassive black holes M87…

gr-qc2022★ 68 cited

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…

gr-qc2022★ 8 cited

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…

gr-qc2022★ 25 cited

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…

gr-qc2022★ 8 cited

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…

gr-qc2022★ 12 cited

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…

gr-qc2022★ 10 cited

Constraining deviations from spherical symmetry using -metric

Hrishikesh Chakrabarty, Yong Tang

The -spacetime metric is a static and axially symmetric vacuum solution of the Einstein equation. This spacetime represents a naked singularity and it has an extra parameter $…

gr-qc2022★ 11 cited

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…

gr-qc2022★ 3 cited

First joint observation by the underground gravitational-wave detector, KAGRA, with GEO600

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1669

We report the results of the first joint observation of the KAGRA detector with GEO600. KAGRA is a cryogenic and underground gravitational-wave detector consisting of a laser inter…

gr-qc2022★ 37 cited

Search for gravitational waves from Scorpius X-1 with a hidden Markov model in O3 LIGO data

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1669

Results are presented for a semi-coherent search for continuous gravitational waves from the low-mass X-ray binary Scorpius X-1, using a hidden Markov model (HMM) to allow for spin…

gr-qc2022★ 103 cited

All-sky search for continuous gravitational waves from isolated neutron stars using Advanced LIGO and Advanced Virgo O3 data

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1667

We present results of an all-sky search for continuous gravitational waves which can be produced by spinning neutron stars with an asymmetry around their rotation axis, using data…