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- Nankai UniversityCN185 papers
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64 papers · 1 filter
Matter Maps to Geometry in Gravitational Collapse
H. Khodabakhshi, Zhi-Chao Li, H. Lu +1
We establish an exact bidirectional map between the effective homogeneous interior density of a collapsing star and the exterior metric function in generalized Oppenheimer--Snyder…
Twisting asymptotically-flat spacetimes
Marc Geiller, Pujian Mao, Antoine Vincenti
We extend the Bondi formalism to describe asymptotically-flat spacetimes where the outgoing null geodesic congruence is not hypersurface-orthogonal, i.e. has non-vanishing twist. I…
From harmonic to Newman-Unti coordinates at the second post-Minkowskian order
Pujian Mao, Baijun Zeng
In this paper, we present the complete transformations of a generic metric from (generalized) harmonic to Newman-Unti coordinates up to the second post-Minkowskian order . T…
Note on identifying four-dimensional vacuum solutions from Weyl invariants
Pujian Mao
The diffeomorphism covariance is a fundamental property of General Relativity which leads to the fact that the same solution of Einstein equation can be given in completely distinc…
Constraining Cubic Curvature Corrections to General Relativity with Quasi-Periodic Oscillations
Alireza Allahyari, Liang Ma, Shinji Mukohyama +1
We investigate observational constraints on cubic curvature corrections to general relativity by analyzing quasi-periodic oscillations (QPOs) in accreting black hole systems. In pa…
Numerical study on the robustness of the stability for stable black holes
Zhan-Feng Mai, Run-Qiu Yang
This paper numerically studies if the stability of a stable black hole is robust against the small perturbation on geometry near its event horizon. In an other word, we numerically…