13 papers
Reflectionless and echo modes in asymmetric Damour-Solodukhin wormholes
Wei-Liang Qian, Qiyuan Pan, Ramin G. Daghigh +2
It is understood that the echo waveforms in ultracompact objects can be regarded as composed mainly of the asymptotic high-overtone quasinormal modes, dubbed echo modes, which pred…
Asymptotic quasinormal modes, echoes, and black hole spectral instability: a brief review
Shui-Fa Shen, Guan-Ru Li, Ramin G. Daghigh +4
We present a short review of the analytical aspects of recent progress in the study of black hole spectral instability and its potential observational consequences. This topic, ins…
On Hyperboloidal Foliations in the Study of Black Hole Quasinormal Modes
Shui-Fa Shen, Guan-Ru Li, Xiao-Mei Kuang +5
In this work, we demonstrate that the hyperboloidal foliation technique, applied to the study of black hole quasinormal modes, where the spatial boundary is shifted from spacelike…
Spectral instability in modified Pöschl-Teller effective potential triggered by deterministic and random perturbations
Shui-Fa Shen, Guan-Ru Li, Ramin G. Daghigh +4
Owing to its substantial implications for black hole spectroscopy, spectral instability has attracted considerable attention in the literature. While the emergence of such instabil…
Cosmological Model Independent Constraints on Lorentz Invariance Violation with Updated Gamma-Ray Burst Observations: An Artificial Neural Network Approach
Jun Tian, Yu Pan, Shuo Cao +2
Searching for Lorentz invariance violation (LIV) using astrophysical sources such as gamma-ray bursts (GRBs) is crucial for probing quantum gravity. However, the dependence of LIV…
Novel black holes with scalar hair in the Einstein-Maxwell-Scalar Theory with positive coupling
Hong Guo, Wei-Liang Qian, Bean Wang
In this work, we find a new branch of hairy black hole solutions in the Einstein-Maxwell-Scalar (EMS) theory in four-dimensional asymptotically flat spacetimes. Different from spon…