Protoplanetary disk model based on radiation magnetohydrodynamics simulations

• Project/Area Number: 24540244
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Astronomy
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: HIROSE Shigenobu 独立行政法人海洋研究開発機構, 数理科学・先端技術研究分野, 主任研究員 (90266924)
• Co-Investigator(Kenkyū-buntansha): SANO Takayoshi 大阪大学, レーザーエネルギー学研究センタ, 助教 (80362606)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 原始惑星系円盤 / 降着円盤 / 熱平衡曲線 / 磁気回転不安定性 / 磁気流体力学 / 輻射輸送 / 水素電離 / 熱不安定 / 矮新星 / 磁気乱流 / 熱対流 / ダスト

Outline of Final Research Achievements

It is crucial to know correct turbulent states and thermodynamics in protoplanetary disks to understand the planet formation processes. We have computed thermodynamical structure with magnetic turbulence for a local patch of a protoplanetary disk using direct numerical simulations of magnetohydrodynamics with radiative transfer. Specifically, we have obtained a thermal equilibrium curve (effective temperature vs. surface density) at an inner radius where thermal instability due to ionization transitions is expected.

Research Products

• [Journal Article] Magnetic turbulence and thermodynamics in the inner region of protoplanetary discs (2015)
  • Author(s): Hirose, Shigenobu
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 448 Issue: 4 Pages: 3105-3120
  • DOI: 10.1093/mnras/stv203
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [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 Issue: 1 Pages: 1-1
  • DOI: 10.1088/0004-637x/787/1/1
  • Peer Reviewed
• [Journal Article] Herbig Stars' Near-Infrared Excess: An Origin in the Protostellar Disk's Magnetically-Supported Atmosphere (2014)
  • Author(s): N. J. Turner, M. Benisty, C. P. Dullemond, S. Hirose
  • Journal Title: The Astrophysical Journal Volume: 780 Issue: 1 Pages: 42-42
  • DOI: 10.1088/0004-637x/780/1/42
  • Peer Reviewed
• [Journal Article] Planetesimal Formation in Magnetorotationally Dead Zones : Critical Dependence on the Net Vertical Magnetic Flux (2012)
  • Author(s): Satoshi Okuzumi
  • Journal Title: The Astrophysical Journal Letters Volume: 753 Issue: 1 Pages: L8-L8
  • DOI: 10.1088/2041-8205/753/1/l8
  • Peer Reviewed
• [Presentation] FU Oriアウトバーストと原始惑星系円盤の熱不安定について (2015)
  • Author(s): 廣瀬重信
  • Organizer: 日本天文学会2015春季年会
  • Place of Presentation: 大阪大学（大阪府豊中市）
  • Year and Date: 2015-03-19
• [Presentation] 磁気回転不安定性が駆動する磁気流体乱流計算の収束性について (2014)
  • Author(s): 簑島敬、廣瀬重信、佐野孝好
  • Organizer: 第136回 地球電磁気・地球惑星圏学会 総会および講演会
  • Place of Presentation: キッセイ文化ホール（長野県松本市）
  • Year and Date: 2014-11-02
• [Presentation] 磁気回転不安定性が駆動する磁気流体乱流計算の収束性について (2014)
  • Author(s): 簑島敬、廣瀬重信、佐野孝好
  • Organizer: 日本流体力学会年会2014
  • Place of Presentation: 東北大学（宮城県仙台市）
  • Year and Date: 2014-09-15
• [Presentation] 矮新星アウトバースト時の降着円盤における磁気乱流状態 (2014)
  • Author(s): 廣瀬重信
  • Organizer: 日本天文学会2014年春季年会
  • Place of Presentation: 国際基督教大学、東京都
• [Presentation] 水素電離を伴う降着円盤におけるエネルギー輸送 (2013)
  • Author(s): 廣瀬重信
  • Organizer: 日本流体力学会年会2013
  • Place of Presentation: 東京農工大学、東京都
• [Presentation] MHD乱流のグリッドスケールでのエネルギー散逸率の評価について (2013)
  • Author(s): 廣瀬重信
  • Organizer: 日本天文学会2013年秋季年会
  • Place of Presentation: 東北大学、宮城県
• [Presentation] 輻射磁気流体力学計算による矮新星降着円盤の熱平衡曲線I (2013)
  • Author(s): 廣瀬重信, Blaes, O., Coleman, M., Krolik, J., 佐野孝好
  • Organizer: 日本天文学会
  • Place of Presentation: 埼玉大学