60 citations · 63 across the 2 of their papers we have counts for
5 papers
Energy Extraction from a Rotating Black Hole by Magnetic Reconnection in Ergosphere
Shinji Koide, Kenzo Arai
We investigate mechanisms of energy extraction from a rotating black hole in terms of negative energy-at-infinity. In addition to the Penrose process through particle fission, the…
Lithium production on a low-mass secondary in a black hole soft X-ray transient
Shin-ichiro Fujimoto, Ryuichi Matsuba, Kenzo Arai
We examine production of Li on the surface of a low-mass secondary in a black hole soft X-ray transient (BHSXT) through the spallation of CNO nuclei by neutrons which are ejected f…
Big-bang nucleosynthesis in Brans-Dicke cosmology with a varying term related to WMAP
R. Nakamura, M. Hashimoto, S. Gamow +1
We investigate the big-bang nucleosynthesis in a Brans-Dicke model with a varying term using the Monte-Carlo method and likelihood analysis. It is found that the cosmic expansi…
Nucleosynthesis inside Gamma-Ray Burst Accretion Disks
S. Fujimoto, M. Hashimoto, K. Arai +1
We investigate nucleosynthesis inside both a gamma-ray burst accretion disk and a wind launched from an inner region of the disk using one-dimensional models of the disk and wind a…
P-Process Nucleosynthesis inside Supernova-Driven Supercritical Accretion Disks
S. Fujimoto, M. Hashimoto, O. Koike +2
We investigate p-process nucleosynthesis in a supercritical accretion disk around a compact object of 1.4 M_solar, using the self-similar solution of an optically thick advection d…