49 citations · 140 across the 13 of their papers we have counts for
7 papers · 1 filter
New results on the dynamics of critical collapse
Jun-Qi Guo, Yu Hu, Pan-Pan Wang +1
We study the dynamics of the critical collapse of a spherically symmetric scalar field. Approximate analytic expressions for the metric functions and matter field in the large-radi…
Onset of chaotic gravitational lensing in non-Kerr rotating black holes with quadrupole mass moment
Wen-Hao Wu, Cheng-Yong Zhang, Cheng-Gang Shao +1
In the electromagnetic channel, chaotic gravitational lensing is a peculiar phenomenon in strong gravitational lensing. In this work, we analyze the properties and emergence of cha…
Matrix method for perturbed black hole metric with discontinuity
Shui-Fa Shen, Wei-Liang Qian, Kai Lin +2
Recent studies based on the notion of black hole pseudospectrum indicated substantial instability of the fundamental and high-overtone quasinormal modes. Besides its theoretical no…
Cuspy and fractured black hole shadows in a toy model with axisymmetry
Wei-Liang Qian, Songbai Chen, Cheng-Gang Shao +2
Cuspy shadow was first reported for hairy rotating black holes, whose metrics deviate significantly from the Kerr one. The non-smooth edge of the shadow is attributed to a transiti…
An alternative explanation of the conflict between 1/R gravity and solar system tests
Cheng-Gang Shao, Rong-Gen Cai, Bin Wang +1
Recently the 1/R gravity has been proposed in order to explain the accelerated expansion of the universe. However, it was argued that the 1/R gravity conflicts with solar system te…
Dirac Cosmology and the Acceleration of the Contemporary Universe
Cheng-Gang Shao, Jianyong Shen, Bin Wang +1
A model is suggested to unify the Einstein GR and Dirac Cosmology. There is one adjusted parameter in our model. After adjusting the parameter in the model by using the…
Quasinormal modes in time-dependent black hole background
Cheng-Gang Shao, Bin Wang, Elcio Abdalla +1
We have studied the evolution of the massless scalar field propagating in time-dependent charged Vaidya black hole background. A generalized tortoise coordinate transformation were…