Steady models of magnetically supported black hole accretion disks

Hiroshi Oda, Mami Machida, Kenji E. Nakamura, Ryoji Matsumoto

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

We obtained steady solutions of magnetized black hole accretion disks taking into account the gas pressure, magnetic pressure, and radiation pressure.We assumed the bremsstrahlung cooling in the optically thin limit and the black body cooling in the optically thick limit.Wassumed that magnetic fields inside the disk are turbulent and dominated by azimuthal component and that the azimuthally averaged Maxwell stress is proportional to the total pressure. We found that when accretion rate exceeds the threshold for the onset of the thermal instability for optically thin disks, a magnetic pressure dominated, cool branch appears in the thermal equilibrium curve. This disk corresponds to the "Bright/Hard" state in black hole candidates observed during the transition from a Low/Hard state to a High/Soft state.

本文言語英語
ホスト出版物のタイトルAstrophysics of Compact Objects - International Conference on Astrophysics of Compact Objects
ページ408-410
ページ数3
DOI
出版ステータス出版済み - 12 1 2008
外部発表はい
イベントInternational Conference on Astrophysics of Compact Objects - Huangshan City, 中国
継続期間: 7 1 20077 7 2007

出版物シリーズ

名前AIP Conference Proceedings
968
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

その他

その他International Conference on Astrophysics of Compact Objects
国/地域中国
CityHuangshan City
Period7/1/077/7/07

All Science Journal Classification (ASJC) codes

  • 物理学および天文学(全般)

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