Study of Young Binary Associated with Gas Disks Based on Numerical Simulations and High Resolution Imaging

• Project/Area Number: 15K05017
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Astronomy
• Research Institution: Chiba University
• Principal Investigator: Hanawa Tomoyuki 千葉大学, 先進科学センター, 教授 (50172953)
• Co-Investigator(Renkei-kenkyūsha): MATSUMOTO Tomoaki 法政大学, 人間環境学部, 教授 (60308004)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 数値シミュレーション / 連星 / 回転系 / 原始惑星系円盤 / 星形成 / 衝撃波 / 理論天文学

Outline of Final Research Achievements

Numerical simulations of a young accreting binary have been performed on a numerical grid corotating with the binary. The accuracy of specific angular momentum has been greatly improved by adopting a new method of evaluating the Coriolis force. This improvement is out of the initial scope and suppresses unnatural oscillations seen in the numerical simulations thus far. As a bi-product, the new method provides an explicit difference scheme which guarantees conservation of the total energy of the fluid including the self-gravity.

Research Products

• [Int'l Joint Research] The University of Hongkong(中国)
• [Journal Article] Detailed modeling of dust distribution in the disk of HD?142527 (2017)
  • Author(s): Soon Kang-Lou、Hanawa Tomoyuki、Muto Takayuki、Tsukagoshi Takashi、Momose Munetake
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 69 Issue: 2 Pages: 34-34
  • DOI: 10.1093/pasj/psx007
  • Peer Reviewed / Open Access
• [Journal Article] Vertical structure of the transition zone from infalling rotating envelope to disc in the Class 0 protostar, IRAS 04368+2557 (2017)
  • Author(s): Sakai, Nami; Oya, Yoko; Higuchi, Aya E.; Aikawa, Yuri; Hanawa, Tomoyuki; Ceccarelli, Cecilia; Lefloch, Bertrand; Lopez-Sepulcre, Ana; Watanabe, Yoshimasa; Sakai, Takeshi; Hirota, Tomoya; Caux, Emmanuel; Vastel, Charlotte; Kahane, Claudine; Yamamoto, Satoshi
  • Journal Title: MNRAS Volume: 467 Issue: 1 Pages: L76-L80
  • DOI: 10.1093/mnrasl/slx002
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Fragmentation of a Filamentary Cloud Permeated by a Perpendicular Magnetic Field (2017)
  • Author(s): Hanawa Tomoyuki、Kudoh Takahiro、Tomisaka Kohji
  • Journal Title: The Astrophysical Journal Volume: 848 Issue: 1 Pages: 2-2
  • DOI: 10.3847/1538-4357/aa8b6d
  • Peer Reviewed / Open Access
• [Journal Article] Rotationally driven Fragmentation in the Formation of the Binary Protostellar System L1551 IRS (2016)
  • Author(s): J. Lim, Paul K. H. Yeung, T. Hanawa, S. Takakuwa, T. Matsumoto, K. Saigo
  • Journal Title: The Astrophysical Journal Volume: 826 Issue: 2 Pages: 153-172
  • DOI: 10.3847/0004-637x/826/2/153
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Formation of the Unequal-mass Binary Protostars in L1551NE by Rotationally driven Fragmentation (2016)
  • Author(s): Jeremy Lim, Tomoyuki Hanawa, Paul K. H. Yeung, Shigehisa Takakuwa, Tomoaki Matsumoto, and Kazuya Saigo
  • Journal Title: The Astrophysical Journal Volume: 831 Issue: 1 Pages: 90-102
  • DOI: 10.3847/0004-637x/831/1/90
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Submillimeter Polarization Observation of the Protoplanetary Disk around HD 142527 (2016)
  • Author(s): Kataoka, A., Tsukagoshi, T., Momose, M., Nagai, H., Muto, T., Dullemond, C. P., Pohl, A., Fukagawa, M., Shibai, H., Hanawa, T., & Murakawa, K.
  • Journal Title: The Astrophysical Journal Letters Volume: 831 Issue: 2 Pages: 6-12
  • DOI: 10.3847/2041-8205/831/2/l12
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Approximate Riemann solvers for the cosmic ray magnetohydrodynamical equations (2016)
  • Author(s): Yuki Kudoh, Tomoyuki Hanawa
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 462 Issue: 4 Pages: 4517-4531
  • DOI: 10.1093/mnras/stw1937
  • Peer Reviewed / Open Access
• [Journal Article] Spiral Arms, Infall, and Misalignment of the Circumbinary Disk from the Circumstellar Disks in the Protostellar Binary System L1551 NE (2016)
  • Author(s): Takakuwa, Shigehisa; Saigo, Kazuya; Matsumoto, Tomoaki; Saito, Masao; Lim, Jeremy; Hanawa, Tomoyuki; Yen, Hsi-Wei; Ho, Paul T. P.
  • Journal Title: The Astrophysical Journal Volume: 837 Issue: 1 Pages: 86-99
  • DOI: 10.3847/1538-4357/aa6116
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Structure and Stability of Filamentary Clouds Supported by Lateral Magnetic Field (2015)
  • Author(s): T. Hanawa, K. Tomisaka
  • Journal Title: Astrophysical Journal Volume: 801 Issue: 1 Pages: 11-11
  • DOI: 10.1088/0004-637x/801/1/11
  • Peer Reviewed
• [Journal Article] Millimeter-wave Polarization of Protoplanetary Disks due to Dust Scattering (2015)
  • Author(s): A. Kataoka, T. Muto, M. Momose, T. Tsukagoshi, M. Fukagawa, H. Shibai, T. Hanawa, K. Murakawa, C.P. Dullemond
  • Journal Title: Astrophysical Journal Volume: 809 Issue: 1 Pages: 1-1
  • DOI: 10.1088/0004-637x/809/1/78
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Significant gas-to-dust ratio asymmetry and variation in the disk of HD 142527 and the indication of gas depletion (2015)
  • Author(s): T. Muto, T. Tsukagoshi, M. Momose, T. Hanawa, H. Nomura, M. Fukagawa, K. Saigo, A. Kataoka, Y. Kitamura, S.Z. Takahashi, S. Inutsuka, T. Tkeuchi, H. Kobayashi, E. Akiyama, M. Honad, H. Fujiwara, H. Shibai
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 67 Issue: 6 Pages: 1-1
  • DOI: 10.1093/pasj/psv098
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] 垂直な磁場に貫かれたフィラメント状分子雲のJeans不安定 (2017)
  • Author(s): 花輪知幸、工藤哲洋、富阪幸治
  • Organizer: 日本天文学会
  • Place of Presentation: 九州大学（福岡県・福岡市）
  • Year and Date: 2017-03-15
• [Presentation] Fragmentation of Filamentary Molecular Clouds Threaded by Perpendicular Magnetic Field (2017)
  • Author(s): T. Hanawa, T. Kudoh, K. Tomisaka
  • Organizer: Annual Meeting of the American Astronomical Society
  • Place of Presentation: グレープバイン（合衆国）
  • Year and Date: 2017-01-03
• [Presentation] Fragmentation of Filamentary Molecular Clouds Threaded by Perpendicular Magnetic Field (2017)
  • Author(s): Tomoyuki Hanawa
  • Organizer: Phase Transitions in Astrophysics, from ISM to Planets
  • Int'l Joint Research
• [Presentation] Spiral Shocks in Young Circumbinary Disks (2017)
  • Author(s): Tomoyuki Hanawa
  • Organizer: 12th International Conference on Numerical Modeling of Space Plasma Flows
  • Int'l Joint Research
• [Presentation] 乱流による実効的な圧力を考慮したフィラメントモデルの安定性 (2017)
  • Author(s): 花輪知幸
  • Organizer: 日本天文学会秋季年会
• [Presentation] Numerical Evaluation of the Coriolis Force on the Cartesian Grid (2017)
  • Author(s): Tomoyuki Hanawa
  • Organizer: Numerical Simulations of Planet-Disk Interactions
  • Int'l Joint Research
• [Presentation] 降着エンベーロープからケプラー円盤への遷移 (2016)
  • Author(s): 花輪知幸、坂井南美、大屋瑶子、山本智
  • Organizer: 日本天文学会
  • Place of Presentation: 愛媛大学（愛媛県・松山市）
  • Year and Date: 2016-09-14
• [Presentation] Protoplanetary Disks (2016)
  • Author(s): T. Hanawa
  • Organizer: Accretion Processes in Cosmic Sources
  • Place of Presentation: サンクトペテルブルク（ロシア）
  • Year and Date: 2016-09-05
  • Int'l Joint Research / Invited
• [Book] Numerical Modeling of Space Plasma Flows ASTRONUM-2014 (2015)
  • Author(s): T. Hanawa
  • Total Pages: 7
  • Publisher: Astronomical Society of the Pacific
• [Book] Revolution in Astronomy with ALMA: The Third Year. (2015)
  • Author(s): S. Takakuwa, M. Saito, K. Saigo, T. Matsumoto, J. Lim, T. Hanawa, P.T.P. Ho
  • Total Pages: 2
  • Publisher: Astronomical Society of the Pacific