5 citations · 5 across the 1 of their papers we have counts for
3 papers
astro-ph.HE2018
High-energy and very-high-energy emission from stellar-mass black holes moving in gaseous clouds
Kouichi Hirotani, Hung-Yi Pu, Sabrina Outmani +5
We investigate the electron-positron pair cascade taking place in the magnetosphere of a rapidly rotating black hole. Because of the spacetime frame dragging, the Goldreich-Julian…
astro-ph.GA2017★ 5 cited
Enhanced gamma radiation toward the rotation axis from the immediate vicinity of extremely rotating black holes
Yoogeun Song, Hung-Yi Pu, Kouichi Hirotani +3
We investigate the acceleration of electrons and positrons by magnetic-field-aligned electric fields in the polar funnel of an accreting black hole (BH). Applying the pulsar outer-…
gr-qc2016
The Influence of the Shear on the Gravitational Waves in the Early Anisotropic Universe
Yoogeun Song, Seok Jae Park
We study the singularity of the congruences for both timelike and null geodesic curves using the expansion of the early anisotropic Bianchi type I Universe. In this paper, we conce…