5 papers
Black Hole Ringdown Seen in Photon Polarization Swings
Jiewei Huang, Yehui Hou, Zhen Zhong +2
Light propagating through a perturbed spacetime could imprint the underlying gravitational waveform directly onto electromagnetic observables. In this Letter, we develop a covarian…
Ultralight Boson Ionization from Comparable-Mass Binaries
Yuhao Guo, Zhen Zhong, Yifan Chen +3
Detection of gravitational waves enables probes of environmental effects around compact binaries. Ultralight bosons, well motivated in particle physics and capable of forming core-…
Whispers from the Early Universe: The Ringdown of Primordial Black Holes
Chen Yuan, Zhen Zhong, Qing-Guo Huang
We investigate the stochastic gravitational wave background (SGWB) generated by the ringdown phase of primordial black holes (PBHs) formed in the early universe. As the ringdown si…
Dynamical Lensing Tomography of Black Hole Ringdown
Zhen Zhong, Vitor Cardoso, Yifan Chen
Strong gravitational lensing occurs when photons pass through the vicinity of a black hole. We investigate this phenomenon in the context of a gravitational-wave event, specificall…
Forward Ray Tracing and Hot Spots in Kerr Spacetime
Lihang Zhou, Zhen Zhong, Yifan Chen +1
Hotspots, often characterized as pointlike emissions, frequently appear near black holes with significantly enhanced luminosity compared to the surrounding accretion flow. Notably,…