Study of cosmic-ray acceleration and propagation processes in star-forming regions using high energy X rays and soft gamma rays

• Project/Area Number: 26800160
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Nagoya University (2016-2017); Japan Aerospace EXploration Agency (2014-2015)
• Principal Investigator: Hayashi Katsuhiro 名古屋大学, 理学研究科, 研究員 (40713863)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: 水素原子ガス / 光学的厚さ / 宇宙線スペクトル / 軟ガンマ線検出器 / Fermi衛星 / Planck衛星 / ガスの柱密度 / ガンマ線 / 宇宙線密度 / 星形成領域 / ASTRO-H衛星 / 宇宙線

Outline of Final Research Achievements

This study aimed to reveal cosmic-ray acceleration and propagation processes in the local interstellar medium using X-ray and gamma-ray data. Due to an incident of the Hitomi satellite, we could not perform analyses using X-ray and soft gamma-ray data, but we succeeded to accurately measure the mass of the atomic hydrogen for a local molecular cloud complex, Chamaeleon region, through comparing GeV gamma rays obtained by Fermi with a gas column density model based on dust optical depth estimated from the Planck dust emission model. The obtained hydrogen column density is 1.3-1.5 times larger than that measured by previous estimates. Based on this column density model, we derived a cosmic-ray spectrum in the Chamaeleon region, which suggests a uniform cosmic-ray density in the vicinity of the solar system.

Research Products

• [Journal Article] Design and performance of Soft Gamma-ray Detector onboard the Hitomi (ASTRO-H) satellite (2018)
  • Author(s): Tajima, H., Fukazawa, Y.(3番目), 他40名
  • Journal Title: JATIS Volume: 4 Issue: 02 Pages: 021411-021411
  • DOI: 10.1117/1.jatis.4.2.021411
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The hard X-ray imager (HXI) onboard ASTRO-H (2018)
  • Author(s): K. Nakazawa, G. Sato, M. Kokubun, ..., K. Hayashi, ... (8番目/35人中)
  • Journal Title: Journal of Astronomical Telescopes, Instruments, and Systems Volume: 4(2) Issue: 02 Pages: 1-1
  • DOI: 10.1117/1.jatis.4.2.021410
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] In-Orbit Performance and Calibration of the Hard X-ray Imager (HXI) onboard Hitomi (ASTRO-H) (2018)
  • Author(s): K. Hagino, K. Nakazawa, G. Sato, ..., K. Hayashi, ... (7番目/40人中)
  • Journal Title: Journal of Astronomical Telescopes, Instruments, and Systems Volume: 4(2) Issue: 02 Pages: 1-1
  • DOI: 10.1117/1.jatis.4.2.021409
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Hitomi (ASTRO-H) X-ray Astronomy Satellite (2018)
  • Author(s): Tadayuki Takahashi, Yuto Ichinohe (73/270) et al.
  • Journal Title: Journal of Astronomical Telescopes, Instruments, and Systems Volume: 4 Issue: 02 Pages: 021402-021402
  • DOI: 10.1117/1.jatis.4.2.021402
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Modeling of proton-induced radioactivation background in hard X-ray telescopes: Geant4-based simulation and its demonstration by Hitomi’s measurement in a low Earth orbit (2018)
  • Author(s): H. Odaka, M. Asai, K. Hagino, ..., K. Hayashi, ... (13番目/50人中)
  • Journal Title: Nuclear Inst. and Methods in Physics Research, A Volume: 891 Pages: 92-105
  • DOI: 10.1016/j.nima.2018.02.071
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Quantifying the Interstellar Medium and Cosmic Rays in the MBM 53, 54, and 55 Molecular Clouds and the Pegasus Loop Using Fermi-LAT Gamma-ray Observations (2016)
  • Author(s): Mizuno, T.; Abdollahi, S.; Fukui, Y.; Hayashi, K.; Okumura, A.; Tajima, H.; Yamamoto, H.
  • Journal Title: The Astrophysical Journal Volume: 833 Issue: 2 Pages: 223-246
  • DOI: 10.3847/0067-0049/223/2/26
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] The quiescent intracluster medium in the core of the Perseus cluster (2016)
  • Author(s): Hitomi Collaboration et al.
  • Journal Title: Nature Volume: 535 Issue: 7610 Pages: 117-121
  • DOI: 10.1038/nature18627
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The ASTRO-H (Hitomi) x-ray astronomy satellite (2016)
  • Author(s): Takahashi, T. et al.
  • Journal Title: Proceedings of the SPIE Volume: 9905 Pages: 990510-11
  • DOI: 10.1117/12.2232379
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The soft gamma-ray detector (SGD) onboard ASTRO-H (2016)
  • Author(s): Shin Watanabe, Yuto Ichinohe (9/42), et al.
  • Journal Title: Proc. SPIE 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray Volume: 9905 Pages: 990513-990513
  • DOI: 10.1117/12.2231962
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The hard x-ray imager (HXI) onboard ASTRO-H (2016)
  • Author(s): K. Nakazawa, G. Sato, M. Kokubun, …, K. Hayashi 他
  • Journal Title: SPIE Proceeding Volume: 9905 Pages: 1-12
  • DOI: 10.1117/12.2231176
  • Int'l Joint Research
• [Journal Article] Study of the polarimetric performance of a Si/CdTe semiconductor Compton camera for the Hitomi satellite (2016)
  • Author(s): J. Katsuta, T. Takahashi et al. (SGD Team)
  • Journal Title: Nuclear Instruments and Methods A Volume: 840 Pages: 51-58
  • DOI: 10.1016/j.nima.2016.09.057
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The First Demonstration of the Concept "Narrow-FOV Si/CdTe Semiconductor Compton Camera" (2016)
  • Author(s): Y. Ichinohe, Y. Uchida, S. Watanabe, I. Edahiro, K. Hayashi, T. Kawano, M. Ohno, M. Ohta, S. Takeda, Y. Fukazawa, M. Katsuragawa, K. Nakazawa, H. Odaka, H. Tajima, H. Takahashi, T. Takahashi, and T. Yuasa
  • Journal Title: Nuclear Instruments and Methods in Physics Research Section A Volume: 806 Pages: 5-13
  • DOI: 10.1016/j.nima.2015.09.081
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Suzaku Observation of the Fermi Cygnus Cocoon: The Search for a Signature of Young Cosmic-Ray Electrons (2015)
  • Author(s): T. Mizuno, T. Tanabe, H. Takahashi, K. Hayashi, R. Yamazaki, I. Grenier, L. Tibaldo
  • Journal Title: The Astrophysical Journal Volume: 803 Issue: 2 Pages: 741-9
  • DOI: 10.1088/0004-637x/803/2/74
  • Peer Reviewed / Open Access
• [Journal Article] Soft gamma-ray detector (SGD) onboard the ASTRO-H mission (2014)
  • Author(s): Fukazawa, Y., Tajima, H., Watanabe, S., Blandford, R., Hayashi, K., Harayama, A., Kataoka, J., Kawaharada, M., Kokubun, M., Laurent, P., Lebrun, F., Limousin, O., Madejski, G. M., Makishima, K., Mizuno, T., Mori, K., Nakamori, T., Nakazawa, K., Noda, H., Odaka, H. et al.
  • Journal Title: Proc. of SPIE Volume: 9144 Pages: 1-12
  • DOI: 10.1117/12.2055292
  • Open Access
• [Presentation] Chameleon Region Optically Thick HI (2018)
  • Author(s): K. Hayashi, H. Yamamoto, Y. Fukui, T. Mizuno, N. Hidaka, H. Tajima and A. Okumura
  • Organizer: Fermi-LAT collaboration meeting
  • Int'l Joint Research
• [Presentation] フェルミ・ガンマ線宇宙望遠鏡によるカメレオン座分子雲領域の星間物質の探査 (2017)
  • Author(s): 林 克洋, 岡本竜治, 山本宏昭, 福井康雄, 日高直哉, 田島宏泰, 奥村暁, 他 Fermi-LAT collaboration
  • Organizer: 日本天文学会春季年会2017
  • Place of Presentation: 九州大学
  • Year and Date: 2017-03-15
• [Presentation] フェルミ・ガンマ線宇宙望遠鏡による2016年の成果 (2017)
  • Author(s): 林 克洋, 深沢泰司, 大杉節, 他 Fermi-LAT collaboration
  • Organizer: 第17回宇宙科学シンポジウム
  • Place of Presentation: 宇宙科学研究所
  • Year and Date: 2017-01-05
• [Presentation] Analysis of Chameleon Molecular Cloud Region Based on the Optically Thick HI (2017)
  • Author(s): K. Hayashi, H. Yamamoto, Y. Fukui, T. Mizuno, N. Hidaka, H. Tajima and A. Okumura
  • Organizer: Fermi-LAT collaboration meeting
  • Int'l Joint Research
• [Presentation] Fermi-LAT study of the ISM in Chamaeleon region using the Planck thermal dust optical depth (2017)
  • Author(s): K. Hayashi on behalf of the Fermi-LAT collaboration
  • Organizer: 7th Fermi Symposium
  • Int'l Joint Research
• [Presentation] Study of the ISM in nearby molecular cloud regions based on the optically thick HI (2016)
  • Author(s): K. Hayashi, R. Okamoto, H. Yamamoto, T. Mizuno, T. Hayakawa, H. Sano, K. Tachihara and Y. Fukui
  • Organizer: CTA研究会「高エネルギーガンマ線でみる極限宇宙2016」
  • Place of Presentation: 宇宙線研究所
  • Year and Date: 2016-12-15
  • Int'l Joint Research
• [Presentation] Fermi-LAT study of the ISM and CRs in Chamaeleon region using the dust optical depth (2016)
  • Author(s): K. Hayashi, Y. Fukui and T. Mizuno on behalf of the Fermi-LAT collaboration
  • Organizer: Interstellar Hydrogen Workshop
  • Place of Presentation: 北海道大学
  • Year and Date: 2016-10-19
  • Int'l Joint Research
• [Presentation] Fermi-LAT study of the ISM in Chamaeleon region using the Planck dust optical depth (2016)
  • Author(s): K. Hayashi, Y. Fukui and T. Mizuno on behalf of the Fermi-LAT collaboration
  • Organizer: The interstellar hydrogen international workshop 2016
  • Place of Presentation: 名古屋大学
  • Year and Date: 2016-09-25
  • Int'l Joint Research
• [Presentation] Analysis of Chameleon Molecular Cloud Regions : Using Gas Model Maps Based on Planck Dust Data with Non-linearity Model (2016)
  • Author(s): K. Hayashi, Y. Fukui, T. Mizuno, H. Tajima, and A. Okumura
  • Organizer: Fermi-LAT Collaboration meeting
  • Place of Presentation: イタリア バーリ
  • Year and Date: 2016-08-25
  • Int'l Joint Research
• [Presentation] Galactic GeV Gamma-ray Sources Observed by Fermi (2016)
  • Author(s): K. Hayashi on behalf of the Fermi-LAT collaboration
  • Organizer: 特別推進研究研究会：宇宙線研究所共同利用研究会「高エネルギーガンマ線でみる極限宇宙2015」
  • Place of Presentation: 東京大学柏キャンパス
  • Year and Date: 2016-01-14
  • Invited
• [Presentation] ASTRO-H衛星搭載軟ガンマ線検出器の衛星総合試験における試験結果 (2015)
  • Author(s): K. Hayashi and the ASTRO-H SGD team
  • Organizer: 日本物理学会 秋季年会
  • Place of Presentation: 大阪市立大学
  • Year and Date: 2015-09-25
• [Presentation] Analysis of Chamaeleon Cloud Regions Using Planck Gas Model Maps (Optically-thick HI hypothesis) (2015)
  • Author(s): K. Hayashi, T. Mizuno, H. Tajima, Y. Fukui and A. Okumura
  • Organizer: Fermi-LAT collaboration meeting
  • Place of Presentation: Torino, Italy
  • Year and Date: 2015-08-31
  • Int'l Joint Research
• [Presentation] Preflight Model Performance of the Soft Gamma-ray Detector Onboard the ASTRO-H (2014)
  • Author(s): K. Hayashki on behalf of the ASTRO-H SGD team
  • Organizer: IEEE NSS/MIC
  • Place of Presentation: Seattle, WA USA
  • Year and Date: 2014-11-08 – 2014-11-09
• [Presentation] Test of Opt-thick HI Hypothesis and Non-proportionality between Dust Opacity and N(H) (2014)
  • Author(s): K. Hayashi, T. Mizuno, H. Tajima, A. Okumura, and Y. Fukui
  • Organizer: Fermi-LAT collaboration meeting
  • Place of Presentation: Montpellier, France
  • Year and Date: 2014-08-31 – 2014-09-02
• [Presentation] Soft gamma-ray detector (SGD) onboard the ASTRO-H mission (2014)
  • Author(s): Y. Fukazawa, H. Tajima, S. Watanabe, R. Blandford, K. Hayashi, 他31名
  • Organizer: SPIE Astronomical Telescopes + Instrumentation
  • Place of Presentation: Montreal, Canada
  • Year and Date: 2014-06-22 – 2014-06-27