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Constraints on the evolution of black hole spin due to magnetohydrodynamic accretion
http://hdl.handle.net/10424/3067
http://hdl.handle.net/10424/3067fe705be9-2c0b-44ae-8f36-26a1b7cc21c0
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
takahashim001.pdf (527.7 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||||||
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| 公開日 | 2010-07-06 | |||||||||
| タイトル | ||||||||||
| タイトル | Constraints on the evolution of black hole spin due to magnetohydrodynamic accretion | |||||||||
| 言語 | en | |||||||||
| 言語 | ||||||||||
| 言語 | eng | |||||||||
| 資源タイプ | ||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||
| 資源タイプ | journal article | |||||||||
| 著者 |
Takahashi, Masaaki
× Takahashi, Masaaki
× Tomimatsu, Akira
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| 研究者総覧へのリンク | ||||||||||
| 高橋, 真聡 | ||||||||||
| https://souran.aichi-edu.ac.jp/teachers/1ed738590de269c5.html | ||||||||||
| 著者(別言語) | ||||||||||
| 著者(別言語) | 高橋, 真聡 | |||||||||
| 抄録 | ||||||||||
| 内容記述タイプ | Abstract | |||||||||
| 内容記述 | Stationary and axisymmetric ideal magnetohydrodynamic (MHD) accretion onto a black hole is studied analytically. The accreting plasma ejected from a plasma source with low velocity must be superfast magnetosonic before passing through the event horizon.We work out and apply a trans-fast magnetosonic solution without detailed analysis of the regularity conditions at the magnetosonic point, by introducing the bending angle β of the magnetic field line, which is the ratio of the toroidal and poloidal components of the magnetic field. To accrete onto a black hole, the trans-magnetosonic solution has some restrictions on β, which are related to the field-aligned parameters of the MHD flows. One of the restrictions gives the boundary condition at the event horizon for the inclination of a magnetic field line. We find that this inclination is related to the energy and angular momentum transport to the black hole. Then, we discuss the spin-up/down process of a rotating black hole by cold MHD inflows in a secular evolution time scale. There are two asymptotic states for the spin evolution. One is that the angular velocity of the black hole approaches to that of the magnetic field line, and the other is that the spin-up effect by the positive angular momentum influx and the spin-down effect by the energy influx (as the mass-energy influx) are canceled. We also show that the MHD inflows prevents the evolution to the maximally rotating black hole. | |||||||||
| 書誌事項 |
Physical review D 巻 78, 号 2, p. 023012, 発行日 2008-07-14 |
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| 出版者 | ||||||||||
| 出版者 | American Physical Society | |||||||||
| ISSN | ||||||||||
| 収録物識別子タイプ | ISSN | |||||||||
| 収録物識別子 | 1550-7998 | |||||||||
| 書誌情報 | ||||||||||
| Physical review D. 2008, 78(2), 023012. | ||||||||||
| 書誌レコードID | ||||||||||
| 収録物識別子タイプ | NCID | |||||||||
| 収録物識別子 | AA00773624 | |||||||||
| 権利 | ||||||||||
| 権利情報 | Copyright: 2008 The American Physical Society | |||||||||
| 著者版フラグ | ||||||||||
| 出版タイプ | VoR | |||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||
| 関係URI | ||||||||||
| 識別子タイプ | URI | |||||||||
| 関連識別子 | http://prd.aps.org/abstract/PRD/v78/i2/e023012 | |||||||||
| 関連名称 | http://prd.aps.org/abstract/PRD/v78/i2/e023012 | |||||||||
| 関係URI | ||||||||||
| 識別子タイプ | DOI | |||||||||
| 関連識別子 | http://dx.doi.org/10.1103/PhysRevD.78.023012 | |||||||||
| 関連名称 | http://dx.doi.org/10.1103/PhysRevD.78.023012 | |||||||||
| DOI | ||||||||||
| 関連タイプ | isIdenticalTo | |||||||||
| 識別子タイプ | DOI | |||||||||
| 関連識別子 | info:doi/10.1103/PhysRevD.78.023012 | |||||||||
| 著者別名 | ||||||||||
| 著者別名 | タカハシ, マサアキ | |||||||||
| 著者別名 | ||||||||||
| 著者別名 | トミマツ, アキラ | |||||||||
| 資源タイプ | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | text | |||||||||
