140 citations · 995 across the 59 of their papers we have counts for
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gr-qc2021★ 42 cited
Gravitational time delay effects by Kerr and Kerr-Newman black holes in strong field limits
Tien Hsieh, Da-Shin Lee, Chi-Yong Lin
We study the time delay between two relativistic images due to strong gravitational lensing of the light rays caused by the Kerr and Kerr-Newman black holes. The trajectories of th…
astro-ph.CO2021★ 69 cited
Power spectrum of primordial perturbations during ultra-slow-roll inflation with back reaction effects
Shu-Lin Cheng, Da-Shin Lee, Kin-Wang Ng
We develop a nonperturbative method through the Hartree factorization to examine the quantum fluctuation effects on the single-field inflationary models in a spatially flat FRW cos…
gr-qc2021★ 69 cited
Strong gravitational lensing by Kerr and Kerr-Newman black holes
Tien Hsieh, Da-Shin Lee, Chi-Yong Lin
We study the strong gravitational lensing due to the Kerr black holes with angular momentum and the Kerr-Newman black holes with additional charge . We first derive the anal…