| Item type |
itemtype_ver1(1) |
| 公開日 |
2022-10-31 |
| タイトル |
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|
タイトル |
Dynamical photon sphere and time evolving shadow around black holes with temporal accretion |
|
言語 |
en |
| 著者 |
Koga, Yasutaka
Asaka, Nobuyuki
Kimura, Masashi
Okabayashi, Kazumasa
|
| アクセス権 |
|
|
アクセス権 |
open access |
|
アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利 |
|
|
言語 |
en |
|
権利情報 |
© 2022 American Physical Society |
| 内容記述 |
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|
内容記述タイプ |
Abstract |
|
内容記述 |
A photon sphere is known as the geometrical structure that shapes a black hole shadow. The mechanism is well understood for static or stationary black hole spacetimes such as the Schwarzschild and the Kerr spacetimes. In this paper, we investigate and explicitly specify a photon sphere that shapes a black hole shadow in a dynamical spacetime while taking the global structure of the spacetime into account. We consider dynamical and eternal black hole cases of the Vaidya spacetime, which represents a spherically symmetric black hole with accreting null dust. First, we numerically show that there are the dynamical photon sphere and photon orbits corresponding to the shadow edge in a moderate accretion case. Second, the photon spheres are derived analytically in special cases. Finally, we discuss the relation between our photon sphere and the several notions defined as a photon sphere generalization. |
|
言語 |
en |
| 出版者 |
|
|
出版者 |
American Physical Society |
|
言語 |
en |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
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|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| 出版タイプ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 関連情報 |
|
|
関連タイプ |
isVersionOf |
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|
識別子タイプ |
DOI |
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|
関連識別子 |
https://doi.org/10.1103/PhysRevD.105.104040 |
| 収録物識別子 |
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|
収録物識別子タイプ |
PISSN |
|
収録物識別子 |
2470-0010 |
| 書誌情報 |
en : Physical Review D
巻 105,
号 10,
発行日 2022-05-15
|
PhysRevD_105_104040.pdf (2.6 MB)
