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Variability science in accretion disk theory
https://jaxa.repo.nii.ac.jp/records/5265
https://jaxa.repo.nii.ac.jp/records/52653414d508-1423-41fe-b087-c89eb7d137d2
名前 / ファイル | ライセンス | アクション |
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64306026.pdf (1.3 MB)
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Item type | 会議発表論文 / Conference Paper(1) | |||||
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公開日 | 2015-03-26 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Variability science in accretion disk theory | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Accretion : Accretion Disk - Black Hole - Magnetohydrodynamics - QPO | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_5794 | |||||
資源タイプ | conference paper | |||||
著者 |
松元, 亮治
× 松元, 亮治× 町田, 真美× 小田, 寛× Matsumoto, Ryoji× Machida, Mami× Oda, Hiroshi |
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著者所属 | ||||||
千葉大学理学研究科物理学コース | ||||||
著者所属 | ||||||
国立天文台 | ||||||
著者所属 | ||||||
千葉大学大学院自然科学研究科 | ||||||
著者所属(英) | ||||||
en | ||||||
Department of Physics, Graduate School of Science, Chiba University | ||||||
著者所属(英) | ||||||
en | ||||||
National Astronomical Observatory | ||||||
著者所属(英) | ||||||
en | ||||||
Graduate School of Science and Technology, Chiba University | ||||||
出版者 | ||||||
出版者 | 宇宙航空研究開発機構 | |||||
出版者(英) | ||||||
出版者 | Japan Aerospace Exploration Agency (JAXA) | |||||
書誌情報 |
宇宙航空研究開発機構特別資料 en : JAXA Special Publication: Astrophysics with All-Sky X-Ray observations: 3rd International MAXI Workshop 巻 JAXA-SP-08-014E, p. 126-131, 発行日 2009-02-27 |
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会議概要(会議名, 開催地, 会期, 主催者等)(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Astrophysics with All-Sky X-Ray observations: 3rd International MAXI Workshop (RIKEN, 10-12 June 2008) | |||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Global three-dimensional magnetohydrodynamic simulations of black hole accretion disks enable us to study the time variabilities of black hole accretion disks without introducing the phenomenological alpha viscosity. Numerical simulations including optically thin radiative cooling revealed that when the disk luminosity exceeds 0.01 L(sub Edd), where L(sub Edd) is the Eddington luminosity, cooling instability taking place in the low/hard state disk creates a magnetically supported, optically thin luminous disk (high/hard state disk) whose X-ray luminosity exceeds 0.1 L(sub Edd) when the accretion rate continues to increase. We found that when the outer region of the disk (r > 20 r(sub s) , where r(sub s) is the Schwarzschild radius) undergoes this transition, an inner torus is formed in r < 10 r(sub s) . The inner torus produces low-frequency quasi-periodic oscillations (QPOs) and high-frequency QPOs whose frequency are 1 - 10 Hz, and ca. 100 Hz, respectively for stellar mass black holes, and 10(exp -6) - 10(exp -5) Hz, and ca. 10(exp -4) Hz, respectively for Seyfert galaxies with black hole mass 10(exp 7) solar mass. When the magnetic energy stored in the disk is released, the disk completes the transition to an optically thick, high/soft state. Monitoring observations by MAXI will detect these transitions in stellar mass black holes and QPOs in AGNs. | |||||
内容記述(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Physical characteristics: Original contains color illustrations | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1349-113X | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA11984031 | |||||
資料番号 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 資料番号: AA0064306026 | |||||
レポート番号 | ||||||
内容記述タイプ | Other | |||||
内容記述 | レポート番号: JAXA-SP-08-014E |