Theoretical Study of Particle Acceleration and Non-Thermal Emission in Active Astronomical Objects

• Project/Area Number: 20540231
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Astronomy
• Research Institution: Osaka University
• Principal Investigator: TAKAHARA Fumio 大阪大学, 大学院・理学研究科, 教授 (20154891)
• Project Period (FY): 2008 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2008: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
• Keywords: 粒子加速 / 無衝突衝撃波 / 超新星残骸 / 相対論的ジェット / 活動銀河 / パルサー / ビーム不安定 / ジッター放射 / 宇宙線輸送 / パルサー星雲 / ガンマ線天文学 / ガンマ線連星 / 電磁流体ビーム不安定

Research Abstract

We have investigated the acceleration mechanisms of relativistic non-thermal particles in supernova remnants, pulsar wind nebulae and active galactic nuclei. We have studied elementary physical processes such as various plasma instabilities in collisionless shocks and made comparisons with gamma-ray observations. We have obtained many interesting results on particle acceleration and diffusion processes as well as X-ray and gamma-ray spectra.

Research Products

• [Journal Article] Calorimetry of Active Galactic Nucleus jets : testing plasma composition in Cygnus A (2012)
  • Author(s): M. Kino、N. Kawakatu、F. Takahara
  • Journal Title: Astrophysical Journal Volume: 751
  • Peer Reviewed
• [Journal Article] A Leptonic Model of Steady High-energy Gamma-Ray Emission from Sgr A* (2012)
  • Author(s): M. Kusunose、F. Takahara
  • Journal Title: Astrophysical Journal Volume: 748
  • Peer Reviewed
• [Journal Article] A Leptonic Model of Steady High-energy Gamma-Ray Emission from Sgr A^* (2012)
  • Author(s): 楠瀬正昭、高原文郎
  • Journal Title: Astrophysical Journal Volume: 748 Issue: 1 Pages: 34-34
  • DOI: 10.1088/0004-637x/748/1/34
  • Peer Reviewed
• [Journal Article] Study of Four Young TeV Pulsar Wind Nebulae with a Spectral Evolution Model (2011)
  • Author(s): S. J. Tanaka、F. Takahara
  • Journal Title: AstrophysicalJournal Volume: 741
  • Peer Reviewed
• [Journal Article] Alfven wave amplification and self-containment of cosmic rays escaping from a supernova remnant (2011)
  • Author(s): Y. Fujita、F. Takahara、Y. Ohira、K. Iwasaki
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 415 Pages: 3434-3438
  • Peer Reviewed
• [Journal Article] A Novel Emission Spectrum from a Relativistic Electron Moving in a Random Magnetic Field (2011)
  • Author(s): Y. Teraki、F. Takahara
  • Journal Title: Astrophysical Journal Letters Volume: 735
  • Peer Reviewed
• [Journal Article] Synchrotron Blob Model of Infrared and X-ray Flares from Sagittarius A* (2011)
  • Author(s): M. Kusunose、F. Takahara
  • Journal Title: Astrophysical Journal Volume: 726
  • Peer Reviewed
• [Journal Article] A Novel Emission Spectrum from a Relativistic Electron Moving in a Random Magnetic Field (2011)
  • Author(s): 寺木悠人、高原文郎
  • Journal Title: Astrophysical Journal Letters Volume: 735 Issue: 2 Pages: L44-L44
  • DOI: 10.1088/2041-8205/735/2/l44
  • Peer Reviewed
• [Journal Article] Study of Four Young Pulsar Wind Nebulae with a Spectral Evolution Model (2011)
  • Author(s): Shuta J.Tanaka
  • Journal Title: The Astrophysical Journal Volume: Vol.741 Issue: 1 Pages: 1-14
  • DOI: 10.1088/0004-637x/741/1/40
  • Peer Reviewed
• [Journal Article] Synchrotron Blob Model of Infrared and X-ray Flares from Sagittarius A^* (2011)
  • Author(s): M.Kusunose, F.Takahara
  • Journal Title: Astrophysical Journal Volume: 726
  • Peer Reviewed
• [Journal Article] Effects of Neutral Particles on Modified Shocks at Supernova Remnants (2010)
  • Author(s): Y. Ohira、F. Takahara
  • Journal Title: Astrophysical Journal Letters Volume: 721
  • Peer Reviewed
• [Journal Article] Modulation Mechanism of TeV, GeV and X-ray Emission in LS5039 (2010)
  • Author(s): M. S. Yamaguchi、F. Takahara
  • Journal Title: Astrophysical Journal Volume: 717 Pages: 85-92
  • Peer Reviewed
• [Journal Article] A Model of the Spectral Evolution of Pulsar Wind Nebulae (2010)
  • Author(s): S. J. Tanaka、F. Takahara
  • Journal Title: Astrophysical Journal Volume: 715 Pages: 1248-1257
  • Peer Reviewed
• [Journal Article] Slow Diffusion of Cosmic Rays Around a Supernova Remnant (2010)
  • Author(s): Y. Fujita、Y. Ohira、F. Takahara
  • Journal Title: Astrophysical Journal Letters Volume: 712
  • Peer Reviewed
• [Journal Article] Modulation Mechanism of TeV, GeV and X-ray Emission in LS5039 (2010)
  • Author(s): M.S.Yamaguchi、F.Takahara
  • Journal Title: Astrophysical Journal 717 Pages: 85-92
  • Peer Reviewed
• [Journal Article] A Model of the Spectral Evolution of Pulsar Wind Nebulae (2010)
  • Author(s): S.J.Tanaka、F.Takahara
  • Journal Title: Astrophysical Journal 715 Pages: 1248-1257
  • Peer Reviewed
• [Journal Article] Slow Diffusion of Cosmic Rays Around a Supernova Remnant (2010)
  • Author(s): Y.Fujita、Y.Ohira、F.Takahara
  • Journal Title: Astrophysical Journal Letters 712
  • Peer Reviewed
• [Journal Article] Effects of Neutral Particles on Modified Shocks at Supernova Remnants (2010)
  • Author(s): Y.Ohira, F.Takahara
  • Journal Title: Astrophysical Journal Letters Volume: 721
  • Peer Reviewed
• [Journal Article] Modulation Mechanism of Tev, Gev, and X-ray Emission in LS5039 (2010)
  • Author(s): M.S.Yamaguchi, F.Takahara
  • Journal Title: Astrophysical Journal Volume: 717 Pages: 85-92
  • Peer Reviewed
• [Journal Article] Slow Diffusion of Cosmic Rays Around a Supernova Remnant (2010)
  • Author(s): Y.Fujita, Y.Ohira, F.Takahara
  • Journal Title: Astrophysical Journal Letters Volume: 712
  • Peer Reviewed
• [Journal Article] Suzaku Observation of Diffuse X-Ray Emission from the Open Cluster Westerlund 2 : a Hypernova Remnant? (2009)
  • Author(s): Y. Fujita、K. Hayashida、H. Takahashi、F. Takahara
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 61 Pages: 1229-1235
  • NAID: 120006828418
  • Peer Reviewed
• [Journal Article] Molecular Clouds as a Probe of Cosmic-Ray Acceleration in a Supernova Remnant (2009)
  • Author(s): Y. Fujita、Y. Ohira、S. J. Tanaka、F. Takahara
  • Journal Title: Astrophysical Journal Letters Volume: 707
  • Peer Reviewed
• [Journal Article] Plasma Instabilities as a Result of Charge Exchange in the Downstream Region of Supernova Remnant Shocks (2009)
  • Author(s): Y. Ohira、T. Terasawa、F. Takahara
  • Journal Title: AstrophysicalJournal Letters Volume: 703
  • Peer Reviewed
• [Journal Article] Two-Dimensional Particle-In-Cell Simulations of the Nonresonant (2009)
  • Author(s): Y. Ohira、B. Reville、J. G. Kirk、F. Takahara
  • Journal Title: Cosmic-Ray-Driven Instability in Supernova Remnant Shocks Volume: 698 Pages: 445-450
  • Peer Reviewed
• [Journal Article] A Relativistic Electron-Positron Outflow from a Tepid Fireball (2009)
  • Author(s): K. Asano、F. Takahara
  • Journal Title: Astrophysical Journal Letters Volume: 690
  • Peer Reviewed
• [Journal Article] Plasma Instabilities as a Result of Charge Exchange in the Downstream Region of Supernova Remnant Shocks (2009)
  • Author(s): Y.Ohira、T.Terasawa、F.Takahara
  • Journal Title: Astrophysical Journal Letters 703
  • Peer Reviewed
• [Journal Article] Two-Dimensional Particle-In-Cell Simulations of the Nonresonant, Cosmic-Ray-Driven Instability in Supernova Remnant Shocks (2009)
  • Author(s): Y.Ohira、B.Reville、J.G.Kirk、F.Takahara
  • Journal Title: Astrophysical Journal 698 Pages: 445-450
  • Peer Reviewed
• [Journal Article] Two-Dimensional Particle-In-Cell Simulations of the Nonresonant, Cosmic-Ray-Driven Instability in Supernova Remnant Shocks (2009)
  • Author(s): Ohira, Y.
  • Journal Title: The Astrophysical Journal 698 Pages: 445-450
  • Peer Reviewed
• [Journal Article] Plasma Instabilities as a Result of Charge Exchange in the Downstream Region of Supernova Remnant Shocks (2009)
  • Author(s): Ohira, Y.
  • Journal Title: The Astrophysical Journal Letters 703
  • Peer Reviewed
• [Journal Article] Molecular Clouds as a Probe of Cosmic-Ray Acceleration in a Supernova Remnant (2009)
  • Author(s): Fujita, Y.
  • Journal Title: The Astrophysical Journal Letters 707
  • Peer Reviewed
• [Journal Article] Suzaku Observation of Diffuse X-Ray Emission from the Open Cluster Westerlund 2 : a Hypernova Remnant? (2009)
  • Author(s): Fujita, Y.
  • Journal Title: Publications of the Astronomical Society of Japan 61 Pages: 1229-1235
  • Peer Reviewed
• [Journal Article] A Relativistic Electron-Positron Outflow from a Tepid Fireball (2009)
  • Author(s): Asano, K.
  • Journal Title: Astrophysica1 Journal 690
  • Peer Reviewed
• [Journal Article] Oblique Ion Two-Stream Instability in the Foot Region of a Collisionless Shock (2008)
  • Author(s): Y. Ohira、F. Takahara
  • Journal Title: Astrophysical Journal Volume: 688 Pages: 320-326
  • Peer Reviewed
• [Journal Article] Synchrotron Self-Compton Model for PKS (2008)
  • Author(s): M. Kusunose、F. Takahara
  • Journal Title: Astrophysical Journal Volume: 682 Pages: 784-788
  • Peer Reviewed
• [Journal Article] Oblique Ion Two-Stream Instability in the Foot Region of a Collisionless Shock (2008)
  • Author(s): Y.Ohira、F.Takahara
  • Journal Title: Astrophysical Journal 688 Pages: 320-326
  • Peer Reviewed
• [Journal Article] Synchrotron Self-Compton Model for PKS 2155-304 (2008)
  • Author(s): Kusunose, M.
  • Journal Title: Astrophysica1 Journal 682 Pages: 784-788
  • Peer Reviewed
• [Journal Article] Oblique Ion Two-Stream Instability in the Foot Region of a Collisionless Shock (2008)
  • Author(s): Ohira, Y.
  • Journal Title: Astrophysical Journal 688 Pages: 320-326
  • Peer Reviewed
• [Presentation] 高エネルギー宇宙物理学の未解決問題 (2012)
  • Author(s): 高原文郎
  • Organizer: 第12回高宇連研究会(招待講演)
  • Place of Presentation: 奈良女子大学
• [Presentation] AGNジェットでの乱流加速 (2012)
  • Author(s): 高原文郎
  • Organizer: 粒子加速に関する小研究会
  • Place of Presentation: 東大宇宙線研究所
• [Presentation] AGNジェットでの乱流加速 (2012)
  • Author(s): 高原文郎
  • Organizer: 粒子加速に関する小研究会
  • Place of Presentation: 東大宇宙線研究所、千葉県
• [Presentation] 高エネルギー宇宙物理学の未解決問題 (2012)
  • Author(s): 高原文郎
  • Organizer: 第12回高宇連研究会
  • Place of Presentation: 奈良女子大学、奈良県(招待講演)
• [Presentation] 高エネルギー現象 (2011)
  • Author(s): 高原文郎
  • Organizer: 第24回理論懇シンポジウム(招待講演)
  • Place of Presentation: 国立天文台
• [Presentation] AGNジェット形成理論 (2011)
  • Author(s): 高原文郎
  • Organizer: 多波長放射で探る活動銀河中心核ジェット研究会(招待講演)
  • Place of Presentation: 国立天文台
• [Presentation] Radiation Spectra from Relativistic Electrons in Turbulent Magnetic Fields (2011)
  • Author(s): F. Takahara、Y. Teraki
  • Organizer: International Meeting Understanding Relativistic Jets
  • Place of Presentation: Krakow, Poland
• [Presentation] Radiation Spectra from Relativistic Electrons in Turbulent Magnetic Fields (2011)
  • Author(s): 高原文郎
  • Organizer: Understanding Relativistic Jets
  • Place of Presentation: Krakow, Poland
• [Presentation] AGNジェット形成理論 (2011)
  • Author(s): 高原文郎
  • Organizer: 多波長放射で探る活動銀河中心核ジェット
  • Place of Presentation: 国立天文台、東京都(招待講演)
• [Presentation] 高エネルギー現象 (2011)
  • Author(s): 高原文郎
  • Organizer: 第24回理論懇シンポジウム
  • Place of Presentation: 国立天文台、東京都(招待講演)
• [Presentation] Physics of AGN Jets : physical properties and central engine (2010)
  • Author(s): F.Takahara
  • Organizer: Towards a root of AGN jets : Recent progress
  • Place of Presentation: 国立天文台
  • Year and Date: 2010-12-14
• [Presentation] Physics of AGN Jets : physical properties and central engine (2010)
  • Author(s): 高原文郎
  • Organizer: Towards a root of AGN jets : Recent progress
  • Place of Presentation: 国立天文台(東京都)(招待講演)
  • Year and Date: 2010-12-14
• [Presentation] 宇宙線加速に関わる理論的課題 (2010)
  • Author(s): 高原文郎
  • Organizer: ガンマ線天文学～日本の戦略
  • Place of Presentation: 東京大学宇宙線研究所
  • Year and Date: 2010-11-16
• [Presentation] 宇宙線加速に関わる理論的課題 (2010)
  • Author(s): 高原文郎
  • Organizer: ガンマ線天文学～日本の戦略
  • Place of Presentation: 東京大学宇宙線研究所(千葉県)(招待講演)
  • Year and Date: 2010-11-16
• [Presentation] EGRETからFermiへ-理論的課題 (2010)
  • Author(s): 高原文郎
  • Organizer: 日本天文学会春季年会
  • Place of Presentation: 広島大学
  • Year and Date: 2010-03-25
• [Presentation] 宇宙線加速に関わる理論的課題 (2010)
  • Author(s): 高原文郎
  • Organizer: ガンマ線天文学～日本の戦略研究会(招待講演)
  • Place of Presentation: 東大宇宙線研究所
• [Presentation] physical properties and central engine (2010)
  • Author(s): F. Takahara、Physics of AGN Jets
  • Organizer: International Workshop Towards a root of AGN jets : Recent progress(招待講演)
  • Place of Presentation: 国立天文台
• [Presentation] A fireball mechanism of relativistic outflow production in AGN (2008)
  • Author(s): F. Takahara、K. Asano
  • Organizer: International workshop The high-energy astrophysics of outflows from compact objects
  • Place of Presentation: Ringberg Castle, Germany
• [Presentation] Buneman and ion two-stream instabilities in the foot of Collisionless shocks (2008)
  • Author(s): F. Takahara
  • Organizer: International Meeting Kinetic Modeling of Astrophysical Plasmas
  • Place of Presentation: Krakow, Poland
• [Presentation] Buneman and ion two-stream instabilities in the foot of Collisionless shocks (2008)
  • Author(s): F.Takahara
  • Organizer: Kinetic Modeling of Astrophysical Plasmas
  • Place of Presentation: Cracow, Poland
• [Presentation] Buneman and ion two-stream instabilities in the foot of Collisionless shocks (2008)
  • Author(s): Takahara, F.
  • Organizer: Kinetic Model ing of Astrophysical Plasmas
  • Place of Presentation: Cracow, Poland
• [Book] 特殊相対論(新物理学シリーズ41) (2012)
  • Author(s): 高原文郎
  • Total Pages: 198
  • Publisher: 培風館
• [Book] 特殊相対論 (2012)
  • Author(s): 高原文郎
  • Total Pages: 198
  • Publisher: 培風館(印刷中)