Colliding-Wind vs. Accretion Models for TeV Gamma-ray Binarie

2010 Fiscal Year Final Research Report

• Project/Area Number: 20540236
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Astronomy
• Research Institution: Hokkai-Gakuen University
• Principal Investigator: OKAZAKI Atsuo Hokkai-Gakuen University, 工学部, 教授 (00185414)
• Project Period (FY): 2008 – 2010
• Keywords: 理論天文学 / ガンマ線天文学 / 大質量連星系 / 数値シミュレーション / Be星 / 恒星風 / 高エネルギー放射

Research Abstract

We carry out 3-D numerical simulations of three very-high-energy gamma-ray binaries with different system and observational characteristics in order to have a unified view/understanding of the origin of various complicated activity in these gamma-ray binaries. Our simulations reveal 3-D time-dependent interaction features in unprecedented details. In systems with Be stars, the interaction structure strongly depends on the density of the Be disk.

Research Products

• [Journal Article] Hydrodynamic Interaction between the Be Star and the Pulsar in the TeV Binary PSR B1259-63/LS 2883 (2011)
  • Author(s): Okazaki, A.T., Nagataki, S., Naito, T., Kawachi, A., Hayasaki, K., Owocki, S.P., Takata, J.
  • Journal Title: Publications of the Astronomical Society of Japan 63巻, 印刷中
  • Peer Reviewed
• [Journal Article] Drastic Spectroscopic Variability of the Be/X-ray Binary A0535+262/V725 Tau during and after the 2009 Giant Outburst (2011)
  • Author(s): Moritani, Y., Nogami, D., Okazaki, A.T., 他5名
  • Journal Title: Publications of the Astronomical Society of Japan 63巻, 印刷中
  • Peer Reviewed
• [Journal Article] Excitation of Trapped g-Mode Oscillations in Warped Disks around Black Holes (2010)
  • Author(s): Oktariani, F., Okazaki, A.T., Kato, S.
  • Journal Title: Publications of the Astronomical Society of Japan 62巻 Pages: 709
  • Peer Reviewed
• [Journal Article] Global Disk Oscillations in Binary Be Stars (2009)
  • Author(s): Oktariani, F., Okazaki, A.T.
  • Journal Title: Publications of the Astronomical Society of Japan 61巻 Pages: 57
  • Peer Reviewed
• [Journal Article] Modelling the RXTE light curve of η Carinae from a 3D SPH simulation of its binary wind collision (2008)
  • Author(s): Okazaki, A.T., Owocki, S.P., Russell, C.M.P., Corcoran, M.F.
  • Journal Title: Monthly Notices of the Royal Astronomical Society : Letters 388巻 Pages: L39
  • Peer Reviewed
• [Presentation] Simulations of accretion in binaries for med by an OB star plus a compact obje ct (2010)
  • Author(s): Okazaki, A.T.
  • Organizer: Workshop on Variable Galactic Gam ma-Ray Sources
  • Place of Presentation: ハイデル ベルグ(ドイツ)
  • Year and Date: 2010-12-01
• [Presentation] Interaction between the Be star and the compact companion in TeV gamma-ray binaries (2010)
  • Author(s): Okazaki, A.T.
  • Organizer: 日本天文学会
  • Place of Presentation: 金沢(石川)
  • Year and Date: 2010-09-23
• [Presentation] Interaction between the Be star and the compact companion in TeV gamma-ray binaries (2010)
  • Author(s): Okazaki, A.T.
  • Organizer: 国際天文学連合シンポジウムNo.272 "Active OB Stars"
  • Place of Presentation: パリ(フランス)
  • Year and Date: 2010-07-23
• [Presentation] Modeling TeV gamma-rays from LS 5039 : An active OB star at the extreme (2010)
  • Author(s): Owocki, S.P., Okazaki, A.T.
  • Organizer: 国際天文学連合シンポジウムNo.272 "Active OB Stars"
  • Place of Presentation: パリ(フランス)
  • Year and Date: 2010-07-23
• [Presentation] Wind accretion in the gamma-ray binary LS 5039 (2009)
  • Author(s): Okazaki, A.T.
  • Organizer: 日本天文学会
  • Place of Presentation: 山口(山口)
  • Year and Date: 2009-09-14
• [Presentation] 3-D Numerical Simulations of Colliding Winds in Eta Carinae and WR 140 (2009)
  • Author(s): Okazaki, A.T.
  • Organizer: 国際天文学連合総会ジョイントディスカッション13
  • Place of Presentation: リオデジャネイロ(ブラジル)
  • Year and Date: 2009-08-13
• [Presentation] TeVガンマ線連星B1259-63/SS 2883からの高エネルギー放射モデルI:パルサーとBe星ガス円盤の潮汐相互作用シミュレーション (2009)
  • Author(s): Okazaki, A.T.
  • Organizer: 日本天文学会
  • Place of Presentation: 堺(大阪)
  • Year and Date: 2009-03-27
• [Presentation] The accretion regime of LS 5039 : 3-D SPH simulations (2008)
  • Author(s): Okazaki, A.T.
  • Organizer: The INTEGRAL Work shop
  • Place of Presentation: コペンハーゲン(デンマーク)
  • Year and Date: 2008-09-10
• [Remarks] ホームページ
  • URL: http://harmas.arc.hokkai-s-u.ac.jp/~okazaki/research-j.html