36 citations · 94 across the 8 of their papers we have counts for
9 papers
Multi-orbit S-star probes of Lorentz violation at the Galactic Center
Jia-Yuan Fang, Jian-Ming Yan, Zong-Kuan Guo
We investigate the potential of Galactic-center S-star observations to probe Lorentz violation in the minimal pure-gravity Standard-Model Extension (SME), focusing on parameter deg…
Constraints on Buchdahl-Inspired Gravity from Future Pulsar Timing near Sgr A*
Jian-Ming Yan, Tao Zhu, Zong-Kuan Guo +1
Future pulsar timing observations near Sgr~A* offer a unique probe of gravitational physics in the vicinity of a supermassive black hole. We forecast the ability of such measuremen…
The effects of asymptotically flat spacetime on black hole image of Sagittarius A*
Jian-Ming Yan, Tao Zhu, Qiang Wu
A new class of analytically expressible vacuum solutions has recently been discovered for pure gravity, building upon Buchdahl's seminal work from 1962. These solutions, in…
Constraining parity and Lorentz violations in gravity with future ground- and space-based gravitational wave detectors
Bo-Yang Zhang, Tao Zhu, Jian-Ming Yan +2
The future ground- and space-based gravitational wave (GW) detectors offer unprecedented opportunities to test general relativity (GR) with greater precision. In this work, we inve…
Modified gravitational wave propagations in linearized gravity with Lorentz and diffeomorphism violations and their gravitational wave constraints
Qiang Wang, Jian-Ming Yan, Tao Zhu +1
The standard model extension (SME) is an effective field theory framework that can be used to study the possible violations of Lorentz symmetry and diffeomorphism invariance in the…
Observational test of spacetimes with the S2 star in the Milky Way galactic center
Jian-Ming Yan, Tao Zhu, Mustapha Azreg-Aïnou +2
A novel class of vacuum metrics expressible in analytical form was recently found for pure gravity, based on a groundwork put forth by Buchdahl in 1962. These Buchda…
Constraints on parity and Lorentz violations in gravity from GWTC-3 through a parametrization of modified gravitational wave propagations
Tao Zhu, Wen Zhao, Jian-Ming Yan +3
Gravitational wave (GW) observations provide sensitive tests of parity and Lorentz symmetries of gravity. Any violation of these fundamental symmetries induces possible deviations…
Observational tests of quantum extension of Schwarzschild spacetime in loop quantum gravity with stars in the galactic center
Jian-Ming Yan, Cheng Liu, Tao Zhu +2
In this paper, we use the publicly available observational data of 17 stellar stars orbiting Sgr A* to test the quantum extension of Schwarzschild spacetime in loop quantum gravity…
Constraints on self-dual black hole in loop quantum gravity with S0-2 star in the Galactic Center
Jian-Ming Yan, Qiang Wu, Cheng Liu +2
One of remarkable features of loop quantum gravity (LQG) is that it can provide resolutions to both the black hole and big bang singularities. In the mini-superspace approach based…