136 citations · 1.3k across the 55 of their papers we have counts for
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Observational Appearance of a Freely-falling Star in an Asymmetric Thin-shell Wormhole
Yiqian Chen, Peng Wang, Houwen Wu +1
It has been recently reported that, at late times, the total luminosity of a star freely falling in black holes decays exponentially with time, and one or two series of flashes wit…
Appearance of an Infalling Star in Black Holes with Multiple Photon Spheres
Yiqian Chen, Guangzhou Guo, Peng Wang +2
Photon spheres play a pivotal role in the imaging of luminous objects near black holes. In this paper, we examine observational appearances of a star freely falling in hairy black…
Gravitational Lensing by Black Holes with Multiple Photon Spheres
Guangzhou Guo, Xin Jiang, Peng Wang +1
We study gravitational lensing of light by hairy black holes, which, in a certain parameter regime, can possess two photon spheres of different size outside the event horizon. In p…
Echoes from Hairy Black Holes
Guangzhou Guo, Peng Wang, Houwen Wu +1
We study the waveforms of time signals produced by scalar perturbations in static hairy black holes, in which the perturbations can be governed by a double-peak effective potential…
Quasinormal Modes of Black Holes with Multiple Photon Spheres
Guangzhou Guo, Peng Wang, Houwen Wu +1
For a static and spherically symmetric black hole, a photon sphere is composed of circular null geodesics of fixed radius, and plays an important role in observing the black hole.…