Zobrazeno 1 - 5
of 5
pro vyhledávání: '"Song, Yoogeun"'
It is argued that the zero-angular-momentum-observers (ZAMOs) circulating with the frame-dragging-angular-velocity $\omega$ plays a leading part in energy extraction. When the condition $\Omega_{\rm F}<\Omega_{\rm H}$ is satisfied, where $\Omega_{\rm
Externí odkaz:
http://arxiv.org/abs/2401.12684
Autor:
Okamoto, Isao, Song, Yoogeun
It is shown that when only the condition} $0<\Omega_{\rm F}<\Omega_{\rm H}$ is satisfied, the Kerr black hole frame-drags its surrounding force-free magnetosphere with the field-line-angular-velocity (FLAV) $\Omega_{\rm F}$, where $\Omega_{\rm H}$ is
Externí odkaz:
http://arxiv.org/abs/1904.11978
Autor:
Hirotani, Kouichi, Pu, Hung-Yi, Outmani, Sabrina, Huang, Hsinhao, Kim, Dawoon, Song, Yoogeun, Matsushita, Satoki, Kong, Albert K. H
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 charge density changes sign in the vicinity of the event horizon, whic
Externí odkaz:
http://arxiv.org/abs/1809.09397
Autor:
Song, Yoogeun, Pu, Hung-Yi, Hirotani, Kouichi, Matsushita, Satoki, Kong, Albert K. H., Chang, Hsiang-Kuang
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-gap theory to BH magnetospheres, we find that such a lepton accelerato
Externí odkaz:
http://arxiv.org/abs/1707.07916
Autor:
Song, Yoogeun, Park, Seok Jae
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 concentrate on the influence of the shear of the timelike and null geodesic
Externí odkaz:
http://arxiv.org/abs/1604.07639