5 papers
Solving Hamiltonian Constraint Equation with Physics-Informed Neural Networks
Yu-Chen Zhou, Hao Ma, Zhoujian Cao +6
Numerical relativity (NR), solving Einstein equation numerically, plays an important role in source modelling for gravitational wave astronomy. Traditional methods for NR including…
Relativistic excitation of compact stars
Zhiqiang Miao, Xuefeng Feng, Zhen Pan +1
In this work, we study the excitation of a compact star under the influence of external gravitational driving in the relativistic regime. Using a model setup in which a wave with c…
Angular velocity of rotating black holes -- a new way to construct initial data for binary black holes
Shuanglin Huang, Xuefeng Feng, Yun-Kau Lau
Motivated by a geometric understanding of the angular velocity of a Kerr black hole in terms of a quasi-conformal map that describes a 2d Beltrami fluid flow, a new way to construc…
Geometric Inequality for Axisymmetric Black Holes With Angular Momentum
Xuefeng Feng, Ruodi Yan, Sijie Gao +2
In an effort to understand the Penrose inequality for black holes with angular momentum, an axisymmetric, vacuum, asymptotically Euclidean initial data set subject to certain quasi…
Universal gravitational self-force for a point mass orbiting around a compact star
Xuefeng Feng, Huan Yang
In this work, we study the gravitational back-reaction (i.e., the "self-force") of a point mass moving around a non-rotating, compact star on a circular orbit. We find that the add…