抄録
We study both spherically symmetric and rotating black holes with dilaton coupling and discuss the evaporation of these black holes via Hawkings quantum radiation and their fates. We find that the dilaton coupling constant drastically affects the emission rates, and therefore the fates of the black holes. When the charge is conserved, the emission rate from the nonrotating hole is drastically changed beyond =1 (a superstring theory) and diverges in the extreme limit. In the rotating cases we analyze the slowly rotating black hole solution with arbitrary as well as three exact solutions: the Kerr-Newman (=0), Kaluza-Klein (= 3), and Sen black hole (=1 and with axion field). Beyond the same critical value of 1, the emission rate becomes very large near the maximally charged limit, while for <1 it remains finite. The black hole with >1 may evolve into a naked singularity due to its large emission rate. We also consider the effects of a discharge process by investigating superradiance for the nonrotating dilatonic black hole.
| 元の言語 | English |
|---|---|
| ページ（範囲） | 7066-7079 |
| ページ数 | 14 |
| ジャーナル | Physical Review D |
| 巻 | 52 |
| 発行部数 | 12 |
| DOI | |
| 出版物ステータス | Published - 1995 |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
これを引用
Evaporation and fate of dilatonic black holes. / Koga, Jun Ichirou; Maeda, Keiichi.
：: Physical Review D, 巻 52, 番号 12, 1995, p. 7066-7079.研究成果: Article
}
TY - JOUR
T1 - Evaporation and fate of dilatonic black holes
AU - Koga, Jun Ichirou
AU - Maeda, Keiichi
PY - 1995
Y1 - 1995
N2 - We study both spherically symmetric and rotating black holes with dilaton coupling and discuss the evaporation of these black holes via Hawkings quantum radiation and their fates. We find that the dilaton coupling constant drastically affects the emission rates, and therefore the fates of the black holes. When the charge is conserved, the emission rate from the nonrotating hole is drastically changed beyond =1 (a superstring theory) and diverges in the extreme limit. In the rotating cases we analyze the slowly rotating black hole solution with arbitrary as well as three exact solutions: the Kerr-Newman (=0), Kaluza-Klein (= 3), and Sen black hole (=1 and with axion field). Beyond the same critical value of 1, the emission rate becomes very large near the maximally charged limit, while for <1 it remains finite. The black hole with >1 may evolve into a naked singularity due to its large emission rate. We also consider the effects of a discharge process by investigating superradiance for the nonrotating dilatonic black hole.
AB - We study both spherically symmetric and rotating black holes with dilaton coupling and discuss the evaporation of these black holes via Hawkings quantum radiation and their fates. We find that the dilaton coupling constant drastically affects the emission rates, and therefore the fates of the black holes. When the charge is conserved, the emission rate from the nonrotating hole is drastically changed beyond =1 (a superstring theory) and diverges in the extreme limit. In the rotating cases we analyze the slowly rotating black hole solution with arbitrary as well as three exact solutions: the Kerr-Newman (=0), Kaluza-Klein (= 3), and Sen black hole (=1 and with axion field). Beyond the same critical value of 1, the emission rate becomes very large near the maximally charged limit, while for <1 it remains finite. The black hole with >1 may evolve into a naked singularity due to its large emission rate. We also consider the effects of a discharge process by investigating superradiance for the nonrotating dilatonic black hole.
UR - http://www.scopus.com/inward/record.url?scp=0000317931&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000317931&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.52.7066
DO - 10.1103/PhysRevD.52.7066
M3 - Article
AN - SCOPUS:0000317931
VL - 52
SP - 7066
EP - 7079
JO - Physical review D: Particles and fields
JF - Physical review D: Particles and fields
SN - 0556-2821
IS - 12
ER -