Studies of State Transitions in Black Hole Candidates by Collaboration between Magnetohydrodynamic Simulations and X-ray Observations

2013 Fiscal Year Final Research Report

• Project/Area Number: 23340040
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Astronomy
• Research Institution: Chiba University
• Principal Investigator: MATSUMOTO Ryoji 千葉大学, 理学(系)研究科(研究院), 教授 (00209660)
• Co-Investigator(Kenkyū-buntansha): NEGORO Hitoshi 日本大学, 理工学部, 教授 (30300891) ; HANAWA Tomoyuki 千葉大学, 先進科学センター, 教授 (50172953) ; MACHIDA Mami 九州大学, 大学院・理学研究院, 助教 (50455200) ; HIROSE Shigenobu 独立行政法人海洋研究開発機構, 地球内部ダイナミクス領域, 主任研究員 (90266924)
• Co-Investigator(Renkei-kenkyūsha): OHSUGA Ken 国立天文台, 理論研究部, 助教 (90386508) ; KUBOTA Aya 芝浦工業大学, システム理工学部, 准教授 (00391938) ; NAKAMURA Kenji 九州産業大学, 工学部, 准教授 (00342543) ; MATSUMOTO Tomoaki 法政大学, 人間環境学部, 教授 (60308004) ; MIYAJI Shigeki 千葉大学, 大学院・理学研究科, 准教授 (10157646) ; YAMAOKA Kazutaka 名古屋大学, 大学院・理学研究科, 特任准教授 (00365016) ; YOKOYAMA Takaaki 東京大学, 大学院・理学系研究科, 准教授 (00311184)
• Project Period (FY): 2011-04-01 – 2014-03-31
• Keywords: 理論天文学 / X線天文学 / 降着円盤 / 磁気流体力学 / シミュレーション / ブラックホール / 宇宙ジェット / 天体プラズマ

Research Abstract

State transitions of black hole candidates are studied by collaboration between theoretical/simulation studies and X-ray observations. By applying a higher accuracy magnetohydrodynamic code based on the HLLD scheme to hard-to-soft transitions, we found that luminous hard state is maintained by balancing the magnetic energy release and radiative cooling through magnetic reconnection between dynamo fields near the black hole and strong azimuthal fields in the outer disk. We also explained the state transitions observed during a tidal disruption event Swift J1644+57 by radiation hydrodynamic simulations of supercritical accretion onto a supermassive black hole.

Research Products

• [Journal Article] Magneto-hydrodynamic Simulations of a Jet Drilling an HI Cloud : Shock Induced Formation of Molecular Clouds and Jet Breakup (2014)
  • Author(s): Asahina, Y., Ogawa, T., Matsumoto, R., Kawashima, T., Furukawa, N., Enokiya, R., Yamamoto, H., Fukui, Y
  • Journal Title: Astrophysical Journal Volume: (印刷中)
  • Peer Reviewed
• [Journal Article] Convection Causes Enhanced Magnetic Turbulence in Accretion Disks in Outburst (2014)
  • Author(s): Hirose, S., Blaes, O., Krolik, J.H., Coleman, M.S.B., Sano, T
  • Journal Title: Astrophysical Journal Volume: Vol.787 Pages: 1(14)
  • DOI: 10.1088/0004-637X/787/1/1
  • Peer Reviewed
• [Journal Article] MAXI/GSC Discovery of the Black-Hole Candidate MAXI J1305-704 (2013)
  • Author(s): Morihana, K., Sugizaki, M., Nakahira, S., Shidatsu, M., Ueda, Y., Serino, M., Mihara, T., Matsuoka, M., Negoro, H., Kawai, N
  • Journal Title: Publications of the Astronomical Society of Japan Volume: Vol.65 Pages: L10(5)
  • DOI: 10.1093/pasj/65.5.L10
  • Peer Reviewed
• [Journal Article] Recurrent Outbursts and Jet Ejections Expected in Swift J1644+57 : Limit-Cycle Activities in a Supermassive Black Hole (2013)
  • Author(s): Kawashima, T., Ohsuga, K., Usui, R., Kawai, N., Negoro, H., Matsumoto, R
  • Journal Title: Publications of the Astronomical Society of Japan Volume: Vol.65 Pages: L8(5)
  • DOI: 10.1093/pasj/65.4.L8
  • Peer Reviewed
• [Journal Article] Dynamo Activities Driven by Magnetorotational Instability and the Parker Instability in Galactic Gaseous Disks (2013)
  • Author(s): Machida, M., Nakamura, K.E., Kudoh, T., Akahori, T., Sofue, Y., Matsumoto, R
  • Journal Title: Astrophysical Journal Volume: Vol.764 Pages: 81(9)
  • DOI: 10.1088/0004-637X/764/1/81
  • Peer Reviewed
• [Journal Article] Combined Spectral and Timing Analysis of the Black Hole Candidate MAXI J1659-152, Discovered by MAXI and Swift (2012)
  • Author(s): Yamaoka, K., Allured, R., Kaaret, P., Kennea, J.A., Kawaguchi, T., Gandhi, P., Shaposhnikov, N., Ueda, Y., Nakahira, S., Kotani, T., Negoro, H., Takahashi, I., Yoshida, A., Kawai, N., Sugita, S
  • Journal Title: Publications of the Astronomical Society of Japan Volume: Vol.64 Pages: 32(15)
  • DOI: 10.1093/pasj/64.2.32
  • Peer Reviewed
• [Journal Article] Comptonized Photon Spectra of Supercritical Black Hole Accretion Flows with Application to Ultraluminous X-ray Sources (2012)
  • Author(s): Kawashima, T., Ohsuga, K., Mineshige, S., Yoshida, T., Heinzeller, D., Matsumoto, R
  • Journal Title: Astrophysical Journal Volume: Vol.752 Pages: 18(12)
  • DOI: 10.1088/0004-637X/752/1/18
  • Peer Reviewed
• [Journal Article] Global Structure of Optically Thin, Magnetically Supported, Two-Temperature, Black Hole Accretion Disks (2012)
  • Author(s): Oda, H., Machida, M., Nakamura, K.E., Matsumoto, R., Narayan, R
  • Journal Title: Publications of the Astronomical Society of Japan Volume: Vol.64, No.1 Pages: 15(21)
  • DOI: 10.1093/pasj/64.1.15
  • Peer Reviewed
• [Presentation] Global Threedimensional Magnetohydrodynamic Simulations of Hard-to-Soft Transition and Jet Formation (2014)
  • Author(s): Matsumoto, R. 他
  • Organizer: Suzaku-MAXI 2014 "Expanding the Frontiers of the X-ray Universe"
  • Place of Presentation: 愛媛大学
  • Year and Date: 20140219-0222
• [Presentation] MAXI observes black-hole X-ray novae from the beginning to the end (2014)
  • Author(s): Negoro, H
  • Organizer: Suzaku-MAXI 2014 "Expanding the Frontiers of the X-ray Universe"
  • Place of Presentation: 愛媛大学
  • Year and Date: 2014-02-20
• [Presentation] Numerical Study of Supercritical Accretion Flow onto the Black Hole Using Relativistic Radiation Magnetohydrodynamic Code (2013)
  • Author(s): Takahashi, H.R., Ohsuga, K
  • Organizer: 12th Asia Pacific Physics Conference
  • Place of Presentation: 幕張メッセ
  • Year and Date: 2013-07-16
• [Presentation] Limit-Cycle Activities in a Tidal Disruption Event by a Supermassive Black Hole (2013)
  • Author(s): Kawashima, T., Ohsuga, K. 他
  • Organizer: 12th Asia Pacific Physics Conference
  • Place of Presentation: 幕張メッセ
  • Year and Date: 2013-07-16
• [Presentation] 降着円盤の角運動量輸送問題 (2013)
  • Author(s): 松元亮治
  • Organizer: 日本物理学会
  • Place of Presentation: 広島大学
  • Year and Date: 2013-03-28
• [Presentation] Reconstruction Method for M1 Equations of Radiative Transfer (2012)
  • Author(s): Hanawa, T
  • Organizer: East Asia Numerical Astrophysics Meeting EANAM2012
  • Place of Presentation: 京都大学
  • Year and Date: 2012-11-02
• [Presentation] Hot Spine and Compton-Cooled Sheath Structure of Radiation MHD Jet : Observational Feature of Super- Eddington Black Hole Accretion Flow and Outflow (2012)
  • Author(s): Kawashima, T., Ohsuga, K. 他
  • Organizer: East Asia Numerical Astrophysics Meeting EANAM2012
  • Place of Presentation: 京都大学
  • Year and Date: 2012-10-31
• [Presentation] Global Threedimensional Magnetohydrodynamic Simulations of Disk Dynamos (2012)
  • Author(s): Matsumoto, R. 他
  • Organizer: East Asia Numerical Astrophysics Meeting EANAM2012
  • Place of Presentation: 京都大学
  • Year and Date: 2012-10-31
• [Presentation] 3 years all-sky X-ray observations with MAXI (2012)
  • Author(s): Negoro, H
  • Organizer: Half a Century of X-ray Astronomy
  • Place of Presentation: Mykonos, Greek
  • Year and Date: 2012-09-20
• [Presentation] Global Simulations of Magnetic Environments around Compact Objects (2012)
  • Author(s): Matsumoto, R
  • Organizer: IAU Symposium 290, Feeding Compact Objects : Accretion on All Scales
  • Place of Presentation: Beijing (China)
  • Year and Date: 2012-08-24
• [Presentation] MAXI Team, Discoveries of New Black Hole Transients MAXI J1659-152 and MAXI J1543-564 (2011)
  • Author(s): Negoro, H. 他
  • Organizer: Suzaku 2011, Exploring the X-ray Universe : Suzaku and Beyond
  • Place of Presentation: SLAC(USA)
  • Year and Date: 20110720-22
• [Presentation] Global 3D MHD Simulations of Disk Dynamo (2011)
  • Author(s): 町田真美, 他
  • Organizer: MHD and Kinetic Processes in Laboratory, Space and Astrophysical Plasmas Workshop
  • Place of Presentation: 北京大学(中国)
  • Year and Date: 2011-06-08
• [Remarks]
  • URL: http://www.astro.phys.s.chiba-u.ac.jp/mhddisk/