Development and observational verification of Monte-Carlo X-ray radiation code toward next-generation observations

• Project/Area Number: 24740190
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Japan Aerospace Exploration Agency
• Principal Investigator: ODAKA Hirokazu 独立行政法人宇宙航空研究開発機構, 宇宙科学研究所, 研究員 (50610820)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); 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: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 中性子星 / ブラックホール / 活動銀河核 / X線天文学 / 輻射輸送 / 国際研究者交流、ドイツ / 国際研究者交流、イギリス / Ｘ線天文学 / 国際研究者交流，ドイツ / 国際研究者交流、アメリカ合衆国

Outline of Final Research Achievements

We have developed a new X-ray radiation calculation code based on Monte Carlo methods toward new/next generation high-precision observations of cosmic X-rays. This code called MONACO is a multi-purpose framework applicable to a variety of astrophysical objects. MONACO treats physical processes of inverse Compton scattering in a hot accretion flow, a photo-ionized plasma, and X-ray reflection from cold matter. We have applied these astrophysical models to accretion flows onto neutron stars and black holes, ultra fast outflows from active galactic nuclei, dusty tori in active galaxies, and accretion disk coronae around white dwarfs, and established data analysis system based on precise Monte-Carlo models for X-ray observatories such as Suzaku, Chandra, and XMM-Newton.

Research Products

• [Journal Article] The origin of ultrafast outflows in AGN: Monte Carlo simulations of the wind in PDS 456 (2015)
  • Author(s): K. Hagino, H. Odaka, C. Done, P. Gandhi, S. Watanabe, M. Sako, T. Takahashi
  • Journal Title: MNRAS Volume: 446(1) Issue: 1 Pages: 663-676
  • DOI: 10.1093/mnras/stu2095
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Discovery of recombining plasma in the supernova remnant 3C 391 (2014)
  • Author(s): Sato Tamotsu, Koyama Katsuji, Takahashi Tadayuki, Odaka Hirokazu, Nakashima Shinya
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 66 Issue: 6 Pages: 1249-1257
  • DOI: 10.1093/pasj/psu120
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] The Si/CdTe semiconductor Compton camera of the ASTRO-H Soft Gamma-ray Detector (SGD) (2014)
  • Author(s): S. Watanabe, H. Tajima, Y. Fukazawa, Y. Ichinohe, S. Takeda, T. Sato, H. Odaka, T. Fukuyama, M. Ohta, S. Saito, K. Hagino, A. Togo, A. Harayama, G. Sato, T. Takahashi, S. Tomizuka, S. Furui, R. Nakamura, T. Tanaka, T. Enoto, H. Noda, K. Nakazawa, K. Genba, D. Matsuura, M. Onishi, Y. Kuroda
  • Journal Title: NIMA Volume: 765 Pages: 192-201
  • DOI: 10.1016/j.nima.2014.05.127
  • Peer Reviewed
• [Journal Article] Bin mode estimation methods for Compton camera imaging (2014)
  • Author(s): S. Ikeda, H. Odaka, M. Uemura, T. Takahashi, S. Watanabe, S. Takeda
  • Journal Title: Nuclear Instruments and Methods in Physics Research A Volume: 760 Pages: 46-56
  • DOI: 10.1016/j.nima.2014.05.081
  • Peer Reviewed / Open Access
• [Journal Article] Short-term variability of x-rays from accreting neutron star vela X-1. I. Suzaku observations (2013)
  • Author(s): Odaka, H., Khangulyan, D., Tanaka, Y.T., Watanabe, S., Takahashi, T., Makishima, K.
  • Journal Title: Astrophysical Journal Volume: 780 Issue: 1 Pages: 70-86
  • DOI: 10.1088/0004-637x/767/1/70
  • Peer Reviewed
• [Journal Article] Short-term Variability of X-Rays from Accreting Neutron Star Vela X-1. II. Monte Carlo Modeling (2013)
  • Author(s): Hirokazu Odaka, Dmitry Khangulyan, Yasuyuki T. Tanaka, Shin Watanabe, Tadayuki Takahashi, and Kazuo Makishima
  • Journal Title: The Astrophysical Journal Volume: 780 Issue: 1 Pages: 38-49
  • DOI: 10.1088/0004-637x/780/1/38
  • Peer Reviewed
• [Journal Article] High-resolution Compton cameras based on Si/CdTe double-sided strip detectors (2012)
  • Author(s): Hirokazu Odaka, Yuto Ichinohe, Shin'ichiro Takeda, Taro Fukuyama, Koichi Hagino, Shinya Saito, Tamotsu Sato, Goro Sato, Shin Watanabe, Motohide Kokubun, Tadayuki Takahashi, Mitsutaka Yamaguchi, Takaaki Tanaka, Hiroyasu Tajima, Kazuhiro Nakazawa, Yasushi Fukazawa
  • Journal Title: uclear Instruments and Methods in Physics Research Volume: (印刷中) Pages: 179-183
  • DOI: 10.1016/j.nima.2011.12.061
  • Peer Reviewed
• [Presentation] ASTRO-Hによる中性子星の研究 (2014)
  • Author(s): 小高裕和
  • Organizer: 中性子星核物質第３回研究会
  • Place of Presentation: 熱川
  • Year and Date: 2014-09-03 – 2014-09-05
• [Presentation] ASTRO-H & MONACO for X-ray Polarimetry (2014)
  • Author(s): Hirokazu Odaka
  • Organizer: X-ray Polarisation in Astrophysics -a window about to open?
  • Place of Presentation: ストックホルム
  • Year and Date: 2014-08-25 – 2014-08-28
• [Presentation] Monte Carlo Modelling of Comptonised X-ray Radiation from Accretion Flows onto Neutron Stars and Black Holes (2014)
  • Author(s): Hirokazu Odaka
  • Organizer: The X-ray Universe 2014
  • Place of Presentation: ダブリン
  • Year and Date: 2014-06-16 – 2014-06-19
• [Presentation] MONACO: Calculation Framework of X-ray Radiation in Astrophysical Objects based on Monte Carlo Simulations (2014)
  • Author(s): 小高裕和
  • Organizer: 第５回アウトフロー研究会
  • Place of Presentation: 松山
  • Year and Date: 2014-06-09
• [Presentation] MONACO: Calculation Framework of X-ray Radiation in Astrophysical Objects based on Monte Carlo Simulations (2014)
  • Author(s): Hirokazu Odaka
  • Organizer: HXI/SGD Science Workshop
  • Place of Presentation: 広島大学
  • Invited
• [Presentation] X-ray observations of X-ray/gamma-ray binaries (2013)
  • Author(s): Hirokazu Odaka
  • Organizer: Variable gamma-ray sources
  • Place of Presentation: Barcelona, Spain
  • Invited
• [Presentation] X-ray & Gamma-ray Polarimetry with ASTRO-H (2013)
  • Author(s): Hirokazu Odaka
  • Organizer: The 4th High Energy Phenomena in Relativistic Outflows Meeting
  • Place of Presentation: Heidelberg, Germany
• [Presentation] X-ray Observations of Accreting Neutron Stars (2013)
  • Author(s): Hirokazu Odaka
  • Organizer: The 12th international symposium on Origin of Matter and Evolution of Galaxies
  • Place of Presentation: つくば市
  • Invited
• [Presentation] Short-Term Variability of Comptonized X-rays from Accreting Neutron Star Vela X-1 (2012)
  • Author(s): Hirokazu Odaka
  • Organizer: COSPAR 2012
  • Place of Presentation: Mysole, India
• [Presentation] MONACO: Calculation Framework of X-ray Radiation based on Monte Carlo Simulations (2012)
  • Author(s): Hirokazu Odaka
  • Organizer: Exploring the Non-thermal Universe with Gamma Rays
  • Place of Presentation: Barcelona, Spain
• [Presentation] 降着駆動パルサーVela X-1の広帯域X線スペクトルの時間変動とその解釈 (2012)
  • Author(s): 小高裕和
  • Organizer: 日本天文学会
  • Place of Presentation: 大分