Zobrazeno 1 - 10
of 67
pro vyhledávání: '"Akira Tomimatsu"'
Publikováno v:
The Journal of the Institute of Image Information and Television Engineers. 59:829-832
Publikováno v:
Modern Physics Letters A. 15:815-824
Vacuum polarization of massive scalar fields in a thermal state at arbitrary temperature is studied near the horizon of a Reissner-Nordstr\"{o}m black hole. We derived an analytic form of $$ approximately in the large mass limit near the black hole h
Autor:
Akira Tomimatsu
Publikováno v:
Physical Review D. 57:2613-2616
Publikováno v:
Plasma Physics and Controlled Fusion. 39:A177-A183
Active galactic nuclei are interesting astrophysical objects which contain a super-massive black hole at the central region as an engine of their activity. Plasma accretion onto the black hole is the fundamental process for producing the high and var
Autor:
Akira Tomimatsu
Publikováno v:
Physical Review D. 52:4540-4547
We develop a quantum description of spherically symmetric gravitational collapse of a massless scalar field. The canonical quantization procedure is applied to a minisuperspace model in which the four-metric and scalar field variables are restricted
Autor:
Kouichi Hirotani, Akira Tomimatsu
Publikováno v:
Annals of the New York Academy of Sciences. 759:542-545
We have studied non-stationary and axisymmetric perturbations of a magnetohydrodynamic accretion onto a rotating (Kerr) black hole. Assuming that the magnetic field dominates the plasma accretion, we find that the meridional current becomes large nea
Publikováno v:
Progress of Theoretical Physics. 91:1265-1270
We present a self-similar model of spherically symmetric collapse of a massless scalar field with a parameter $p$. The black hole formation is explicitly shown to occur only in the strong-field implosion of $p >1$. The field evolution in the critical
Autor:
Akira Tomimatsu
Publikováno v:
Vistas in Astronomy. 37:601-604
We study quantum dynamics of spherically symmetric black holes interacting with a scalar field. by solving the Wheeler-DeWitt equation near the apparent horizon. We obtain the wave function representing the black-hole evaporation due to quantum produ
Publikováno v:
Progress of Theoretical Physics. 89:77-87
We consider gravitational collapse of a spherically symmetric dust shell coupled with a massless scalar field. The rest mass can decrease as a result of the scalar wave production. Our purpose is to discuss the backreaction problem in the context of
Autor:
Taichi Kobayashi, Akira Tomimatsu
Publikováno v:
Physical Review D. 82
We study electromagnetic perturbations around a Kerr black hole surrounded by a thin disk on the equatorial plane. Our main purpose is to reveal the black hole superradiance of electromagnetic waves emitted from the disk surface. The outgoing Kerr-Sc