広帯域硬X線を用いた超新星残骸での宇宙線陽子加速源・機構の解明

• Project/Area Number: 07J04014
• Research Category: Grant-in-Aid for JSPS Fellows
• Allocation Type: Single-year Grants
• Section: 国内
• Research Field: Condensed matter physics 1
• Research Institution: Japan Aerospace Exploration Agency
• Principal Investigator: 馬場 彩 Japan Aerospace Exploration Agency, 宇宙科学研究本部, 特別研究員(SPD)
• Project Period (FY): 2007 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥9,000,000 (Direct Cost: ¥9,000,000); Fiscal Year 2009: ¥3,000,000 (Direct Cost: ¥3,000,000); Fiscal Year 2008: ¥3,000,000 (Direct Cost: ¥3,000,000); Fiscal Year 2007: ¥3,000,000 (Direct Cost: ¥3,000,000)
• Keywords: 宇宙線加速 / X線天文学 / 超新星残骸 / パルサー星雲 / TeVガンマ線天文学 / 磁場 / 分子雲 / X線 / ガンマ線 / X線宇宙物理学 / 衝撃波 / 宇宙線 / X線CCD

Research Abstract

最終年度である今年度は、宇宙線加速源候補天体を系統的に調べた。その結果、TeVガンマ線未同定天体の半数以上は現在まで発見されていなかったパルサー星雲であることが分かった。さらに、「すざく」X線天文衛星による低バックグラウンド観測により、パルサー星雲は従来考えられていたより1ケタ以上長い100kyrというタイムスケールで減速することなく膨張し続けることを世界で初めて発見した。これは、パルサー星雲で電子を加速しても数千年でシンクロトロン冷却してしまうという従来の定説を覆す発見である。さらに、シンクロトロン冷却されないということは、パルサー星雲が宇宙線電子・陽電子成分の重要な加速源であることを観測的に示しており、世界で初めての結果である。また、超新星残骸での加速効率がエネルギー収支的にもよいこと、銀河面での宇宙線加速可能性なども示した。また、超新星残骸を有意な宇宙線加速源にするためには、爆発後数百年で加速した陽子を効率よく衝撃波からescapeさせないといけないことも示した。escapeのメカニズムはまだ明らかではないが、2013年度打ち上げ予定の次期X線天文衛星ASTRO-Hで解明できる可能性も示した。
超新星残骸など銀河宇宙線加速源について国内外で多くの招待講演を行ない、日本の成果の普及に努めている。また、海外の天文衛星の観測評価委員なども行なった。広報普及活動も精力的に行ない、宇宙物理学の普及を行なった。

Research Products

• [Journal Article] Chandra view of pulsar wind nebula tori (2010)
  • Author(s): A, Bamba, K.Mori, S.Shibata
  • Journal Title: The Astrophysical Journal 709 Pages: 507-511
  • Peer Reviewed
• [Journal Article] X-Ray Studies of HESS J1809-193 with Suzaku (2010)
  • Author(s): T.Anada, A.Bamba, K.Ebisawa, T.Dotani
  • Journal Title: Publication of the Astronomical Society of Japan 62 Pages: 179-186
  • Peer Reviewed
• [Journal Article] A New Candidate of a Cluster of Galaxies, 2XMM J045637.2+522411 (2010)
  • Author(s): S.Yamauchi, M.Ueno, A.Bamba, K.Koyama
  • Journal Title: Publication of the Astronomical Society of Japan 62 Pages: 219-224
  • Peer Reviewed
• [Journal Article] Search for Sc-K Line Emission from RX J0852.0-4622 Supernova Remnant with Suzaku" (2009)
  • Author(s): J.S.Hiraga, J.S., Y.Kobayashi, T.Tamagawa, A.Hayato, A.Bamba, Y.Terada, R.Petre, H.Katagiri, H.Tsunemi
  • Journal Title: Publication of the Astronomical Society of Japan 61 Pages: 275-281
  • Peer Reviewed
• [Journal Article] Particle Propagation in the Galactic Center and Spatial Distribution of Non-Thermal X-rays (2009)
  • Author(s): V.Dogiel, D.Chernyshov, T.Yuasa, K-S.Cheng, A.Bamba, H.Inoue, C-M.Ko, M.Kokubun, Y.Maeda, K.Mitsuda, K.Nakazawa, N.Y.Yamasaki
  • Journal Title: Publication of the Astronomical Society of Japan 61 Pages: 1093-1098
  • Peer Reviewed
• [Journal Article] Origin of Thermal and Non-Thermal Hard X-ray Emission from the Galactic Center (2009)
  • Author(s): V.Dogiel, D.Chernyshov, T.Yuasa, D.Dmitrii, K-S.Cheng, A.Bamba, H.Inoue, C-M.Ko, M.Kokubun, Y.Maeda, K.Mitsuda, K.Nakazawa, N.Y.Yamasaki
  • Journal Title: Publication of the Astronomical Society of Japan 61 Pages: 1099-1105
  • Peer Reviewed
• [Journal Article] Origin of 6.4keV Line Emission from Molecular Clouds in the Galactic Center (2009)
  • Author(s): V.Dogiel, K.S.Cheng, D.Chemyshov, A.Bamba, A.Ichimura, H.Inoue, C.-M, , Ko, M.Kokubun, Y.Maeda, K.Mitsuda, N.Y.Yamasaki
  • Journal Title: Publication of the Astronomical Society of Japan 61 Pages: 901-907
  • Peer Reviewed
• [Journal Article] Measuring the cosmic ray acceleration efficiency of a supernova remnant (2009)
  • Author(s): E.A.Helder, J.Vink, C.G.Bassa, A.Bamba, J.A.M.Bleeker, S.Funk, P.Ghavamian, K.J.vander Heyden, F.Verbunt, R.Yamazaki
  • Journal Title: Science 325 Pages: 719-719
  • Peer Reviewed
• [Journal Article] The discovery of a pulsar wind nebula around the magnetar candidate AXP 1E1547.0-5408 (2009)
  • Author(s): J.Vink, A.Bamba
  • Journal Title: Astrophysical Journal Letter 707 Pages: 148-152
  • Peer Reviewed
• [Journal Article] Suzaku X-Ray Imaging and Spectroscopy of Cassiopeia A (2009)
  • Author(s): Y.Maeda, Y.Uchiyama, A.Bamba, H.Kosugi, H.Tsunemi, E.A.Helder, J.Vink, N.Kodaka, Y.Terada, Y.Fukazawa, J.Hiraga, J.P.Hughes, M.Kokubun, T.Kouzu, H.Matsumoto, E.Miyata, R.Nakamura, S.Odaka, K.Someya, T.Tamagawa, K.Tamura, K.Totsuka, Y.Tsuboi, Y.Ezoe, S.S.Holt, M.Ishida, T.Kamae, R.Petre, T.Takahashi
  • Journal Title: Publication of the Astronomical Society of Japan 61 Pages: 1217-1228
  • Peer Reviewed
• [Journal Article] Energy-Scale Calibration of the Suzaku X-Ray Imaging Spectrometer Using the Checker Flag Charge Injection Technique in Orbit (2009)
  • Author(s): M. Ozawa, H. Uchiyama, H. Matsumoto, H. Nakajima, K. Koyama, T. Tsuru, M. Uchino, H. Uchida, K. Hayashida, H. Tsunemi, H. Mori, A. Bamba, M. Ozaki, T. Dotani, T. Kohmura, Y. Ishisaki, H. Murakami, T. Kato, T. Kitazono, Y. Kimura, K. Ogawa, S. Kawai, K. Mori, G. Prigozhin, S. Kissel, E. Miller, B. LaMarr, M. Bautz
  • Journal Title: Publication of Astronomy Society of Japan 61
  • Peer Reviewed
• [Journal Article] New CTI Correction Method for Spaced-Row Charge Injection of the Suzaku X-Ray Imaging Spectrometer (2009)
  • Author(s): H. Uchiyama, M. Ozawa, H. Matsumoto, T. G. Tsuru, K. Koyama, M. Kimura, H. Uchida, H. Nakajima, K. Hayashida, H. Tsunemi, H. Mori, A. Bamba, M. Ozaki, T. Dotani, D. Takei, H. Murakami, K. Mori, Y. Ishisaki, T. Kohmura, G. Prigozhin, S. Kissel, E. D. Miller, B. LaMarr, M. Bauz
  • Journal Title: Publication of Astronomy Society of Japan 61
  • Peer Reviewed
• [Journal Article] Modeling and Reproducibility of Suzaku HXD PIN/GSO Background (2009)
  • Author(s): Y. Fukazawa, T. Mizuno, S. Watanabe, M. Kokubun, H. Takahashi, N. Kawano, S. Nishino, M. Sasada, H. Shirai, T. Takahashi, Y. Umeki, T. Yamasaki, T. Yasuda, A. Bamba, M. Ohno, T. Takahashi, M. Ushio, T. Enoto, T. Kitaguchi, K. Makishima, K. Nakazawa, Y. Uehara, S. Yamada, T. Yuasa, N. Isobe, M. Kawaharada, T. Tanaka, M. S. Tashiro, Y. Terada, K. Yamaoka
  • Journal Title: Publication of Astronomy Society of Japan 61
  • Peer Reviewed
• [Journal Article] Suzaku Observations of Tycho's Supernova Remnant (2009)
  • Author(s): T. Tamagawa, A. Hayato, S. Nakamura, Y. Terada, A. Bamba, J. S. Hiraga, J. P. Hughes, U. Hwang, J. Kataoka, T. Tanaka, H. Tsunemi, M. Ueno, S. S. Holt, M. Kokubun, E. Miyata, A. Szymkowiak, T. Takahashi, K. Tamura, D. Ueno, K. Makishima
  • Journal Title: Publication of Astronomy Society of Japan 61
  • Peer Reviewed
• [Journal Article] Suzaku Observation of 30Dor C : A Supernova Remnant with the Largest Non-Thermal Shell (2009)
  • Author(s): H. Yamaguchi, K. Koyama, A. Bamba
  • Journal Title: Publication of Astronomy Society of Japan 61
  • Peer Reviewed
• [Journal Article] X-ray studies of HESS J1837-069 with Suzaku and ASCA : a VHE gamma-ray source originated from the pulsar wind nebula (2009)
  • Author(s): T. Anada, K. Ebisawa, T. Dotani, A. Bamba
  • Journal Title: Publication of Astronomy Society of Japan 61
  • Peer Reviewed
• [Journal Article] Suzaku Observation of HESS J1825-137 : Discovery of Largely-Extended X-rays near from PSR J1826-1334 (2009)
  • Author(s): H. Uchiyama, H., H. Matsumoto, H., T. G. Tsuru, K. Koyama, A. Bamba
  • Journal Title: Publication of Astronomy Society of Japan 61
  • Peer Reviewed
• [Journal Article] R. Nakamura, A. Bamba, M. Ishida, H. Nakajima, R. Yamazaki, Y. Terada, G. Puehlhofer, S. J. Wagner (2009)
  • Author(s): R. Nakamura, A. Bamba, M. Ishida, H. Nakajima, R. Yamazaki, Y. Terada, G. Puehlhofer, S. J. Wagner
  • Journal Title: Publication of Astronomy Society of Japan 61
  • Peer Reviewed
• [Journal Article] X-ray Observation of Very High Energy Gamma-ray Source, HESS J1745-303, with Suzaku (2009)
  • Author(s): A. Bamba, R. Yamazaki, K. Kohri, H. Matsumoto, S. Wagner, G. Puelhofer, K. Kosack
  • Journal Title: The Astrophysical Journal 691 Pages: 1854-1861
  • Peer Reviewed
• [Journal Article] DOPPLER-BROADENED IRON X-RAY LINES FROM TYCHO'S SUPERNOVA REMNANT (2009)
  • Author(s): A. Furuzawa, D. Ueno, A. Hayato, M. Ozawa, T, Tamagawa, A. Bamba, J. P. Hughes, H. Kunieda, K. Makishima, S. S. Holt, U. Hwang, K. Kinugasa, R. Petre, K. Tamura, H. Tsunemi. S. Yamauchi
  • Journal Title: The Astrophysical Journal Letters 693
  • Peer Reviewed
• [Journal Article] uzaku Discovery of Hard X-Ray Pulsations from a Rotating Magnetized White Dwarf, AEAquarii (2008)
  • Author(s): Y. Terada, T. Hayashi, M. Ishida, K. Mukai, T. Dotani, S. Okada, R. Nakamura, S. Naik, A. Bamba, K. Makishima
  • Journal Title: Publication of Astronomy Society of Japan 60 Pages: 387-397
  • Peer Reviewed
• [Journal Article] Study of Nonthermal Emission from SNR RX J1713.7-3946 with Suzaku (2008)
  • Author(s): T. Tanaka, Y. Uchiyama, F. A. Aharonian, T. Takahashi, A. Bamba, J. S. Hiraga, J. Kataoka, T. Kishishita, M. Kokubun, K. Mori, K. Nakazawa, R. Petra, H. Tashima, S. Watanabe
  • Journal Title: The Astrophysical Journal 685 Pages: 988-1004
  • Peer Reviewed
• [Journal Article] X-Ray Emission from Supernova Remnants Observed in the ASCA Galactic Plane Survey (2008)
  • Author(s): S. Yamauchi, M. Ueno, K. Koyama, A. Bamba
  • Journal Title: Publication of Astronomy Society of Japan 60 Pages: 1143-1150
  • Peer Reviewed
• [Journal Article] Suzaku Observation of the RCW86 Northeastern Shell (2008)
  • Author(s): Yamaguchi, H., Bamba, A., et. al.
  • Journal Title: Publications of the Astronomical Society of Japan 60
  • Peer Reviewed
• [Journal Article] Measuring the Broad-Band X-Ray Spectrum from 400eV to 40keV in the Southwest Part of the Supernova Remnant RXJ1713.7-3946 (2008)
  • Author(s): Takahashi, T., Bamba, A., et. al.
  • Journal Title: Publications of the Astronomical Society of Japan 60
  • Peer Reviewed
• [Journal Article] X-Ray Spectroscopy of SN 1006 with Suzaku (2008)
  • Author(s): Yamaguchi, H., Bamba, A., et. al.
  • Journal Title: Publications of the Astronomical Society of Japan 60
  • Peer Reviewed
• [Journal Article] Suzaku Wide-Band Observations of SN1006 (2008)
  • Author(s): Bamba, A., et. al.
  • Journal Title: Publications of the Astronomical Society of Japan 60
  • Peer Reviewed
• [Journal Article] Discovery of Extended X-Ray Emission from an Unidentified TeV Source, HESS J1614-518, Using the Suzaku Satellite (2008)
  • Author(s): Matsumoto, H., Bamba, A., et. al.
  • Journal Title: Publications of the Astronomical Society of Japan 60
  • Peer Reviewed
• [Journal Article] Suzaku Detection of Extended/Diffuse Hard X-Ray Emission from the Galactic Center (2008)
  • Author(s): Yuasa, T., Bamba, A., et. al.
  • Journal Title: Publications of the Astronomical Society of Japan 60
  • Peer Reviewed
• [Journal Article] Spectral Study of the Galactic Ridge X-Ray Emission with Suzaku (2008)
  • Author(s): Ebisawa, K., Bamba, A., et. al.
  • Journal Title: Publications of the Astronomical Society of Japan 60
  • Peer Reviewed
• [Journal Article] The Suzaku Observation of the Nucleus of the Radio-loud Active Galaxy Centaurus A: Constraints on Abundances of the Accreting Material (2007)
  • Author(s): Markowitz, A., Bamba, A., et. al.
  • Journal Title: The Astrophysical Journal 665 Pages: 209-224
  • Peer Reviewed
• [Presentation] Are "dark particle accelerators" really DARK?? (2010)
  • Author(s): Aya Bamba
  • Organizer: GeV to TeV Connection
  • Place of Presentation: Ringberg, Germany
• [Presentation] X-ray measurement of particle injection and escape from SNR shocks (2010)
  • Author(s): Aya Bamba
  • Organizer: Exploring Supernova Remnants and Pulsar Wind Nebulae in X-rays : before and after ASTRO-H
  • Place of Presentation: Kanagawa, Japan
• [Presentation] 「すざく」による超新星残骸RCW 86南西部の詳細観測-加速現場は順行衝撃波か逆行衝撃波か?- (2010)
  • Author(s): 馬場彩
  • Organizer: 日本天文学会秋季年会
  • Place of Presentation: 広島、日本
• [Presentation] Suzaku observations of TeV Galactic sources (2009)
  • Author(s): Aya Bamba
  • Organizer: The Energetic Cosmos : from Suzaku to Astro-H
  • Place of Presentation: Otaru, Hokkaido, Japan
• [Presentation] High energy aspects of SNRs (2009)
  • Author(s): Aya Bamba
  • Organizer: X-RAY ASTRONOMY 2009 : PRESENT STATUS, MULTI-WAVELENGTH APPROACH AND FUTURE PERSPECTIVES
  • Place of Presentation: Bologna, Italy
• [Presentation] Suzaku results on Supernova Remnants (2009)
  • Author(s): Aya Bamba
  • Organizer: Nonlinear Processes in Astrophysical Plasmas : Particle Acceleration, Magnetic Field Amplification, and Radiation Signatures
  • Place of Presentation: Santa Barbara, US.
• [Presentation] Chandra View of Pulsar Wind Nebula Tori (2009)
  • Author(s): Aya Bamba
  • Organizer: Supernova Remnants and Pulsar Wind Nebulae in the Chandra Era
  • Place of Presentation: Boston, US
• [Presentation] ASTRO-Hでみる超新星残骸-宇宙線加速と元素合成の観点から- (2009)
  • Author(s): 馬場彩
  • Organizer: 第22回理論懇シンポジウム「2010年代の理論天文学」
  • Place of Presentation: 名古屋、日本
• [Presentation] Chandraによるパルサー星雲torusの観測 (2009)
  • Author(s): 馬場彩
  • Organizer: 日本天文学会秋季年会
  • Place of Presentation: 山口、日本
• [Presentation] 「すざく」による超新星残骸RCW86非熱的成分の探査 (2008)
  • Author(s): 馬場 彩
  • Organizer: 日本天文学会春季年会
  • Place of Presentation: 東京
  • Year and Date: 2008-03-24
• [Presentation] Nonthermal Supernova Remnants with Suzaku (2008)
  • Author(s): Bamba, A.
  • Organizer: International Workshop on Plasma Shocks and Particle Acceleration
  • Place of Presentation: Osaka, Japan
  • Year and Date: 2008-01-24
• [Presentation] Nonthermal Supernova Remnants with Suzaku (2007)
  • Author(s): Bamba, A.
  • Organizer: The Suzaku X-ray Universe
  • Place of Presentation: San Diego, US
  • Year and Date: 2007-12-13
• [Presentation] HESS未同定天体は超新星残骸か? (2007)
  • Author(s): 馬場 彩
  • Organizer: 第8回高宇連研究会
  • Place of Presentation: 東京
  • Year and Date: 2007-10-17
• [Presentation] X線宇宙衛星「すざく」による銀河系内宇宙線加速機構に関連する成果 (2007)
  • Author(s): 馬場 彩
  • Organizer: 日本天文学会秋季年会
  • Place of Presentation: 岐阜
  • Year and Date: 2007-09-28
• [Presentation] X線宇宙衛星「すざく」による超新星残骸SN1006非熱的成分の観測 (2007)
  • Author(s): 馬場 彩
  • Organizer: 日本物理学会秋季年会
  • Place of Presentation: 北海道
  • Year and Date: 2007-09-24
• [Presentation] X-ray Studies on SNRs with Suzaku (2007)
  • Author(s): Bamba, A.
  • Organizer: Endpoints and Interactions: A Workshop On the Future of Supernova Remnant Research
  • Place of Presentation: Hawaii, US
  • Year and Date: 2007-05-24
• [Remarks]
  • URL: http://www.astro.isas.jaxa.jp/~bamba/