5 papers
Evidence for Intermediate-Mass Black Holes From Microlensing Signatures in CHIME/FRB catalog 2
Huan Zhou, Zhengxiang Li, Cheng-Gang Shao +4
Intermediate-mass black holes (IMBHs) are the missing link in the cosmic hierarchy of black holes, bridging the gap between stellar-mass black holes and supermassive ones. They als…
Polarization Birefringence and Waveform Systematics in GW231123
Tonghua Liu, Chenggang Shao, Kai Liao
GW231123 is a short, massive binary-black-hole event whose source properties show strong waveform dependence. We use this event to test gravitational-wave polarization birefringenc…
Testing supermassive primordial black holes with lensing signals of binary black hole merges
Huan Zhou, Bin Liu, Zheng-Xiang Li +2
Next-generation ground-based gravitational wave (GW) detectors are expected to observe millions of binary black hole mergers, a fraction of which will be strongly lensed by interve…
Exploring black holes with multiple photon spheres by interferometric signatures
Xi-Jing Wang, Yuan Meng, Xiao-Mei Kuang +1
In this paper, we investigate the interferometric signatures of hairy Schwarzschild black holes (hSBHs) that have either single or double photon spheres. Our interest mainly stems…
Distinguishing black holes with and without spontaneous scalarization in Einstein-scalar-Gauss-Bonnet theories via optical features
Xi-Jing Wang, Yuan Meng, Xiao-Mei Kuang +1
Spontaneous scalarization in Einstein-scalar-Gauss-Bonnet theory admits both vacuum-general relativity (GR) and scalarized hairy black holes as valid solutions, which provides a di…