Stellar wind measurements for Colliding Wind Binaries using X-ray spectra

• Project/Area Number: 16K17667
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: 天文学
• Research Institution: Japan Aerospace EXploration Agency
• Principal Investigator: Sugawara Yasuharu 国立研究開発法人宇宙航空研究開発機構, 宇宙科学研究所, 招聘研究員 (80611425)
• Project Period (FY): 2016-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
• Keywords: 宇宙物理 / 大質量星 / X線天文学 / 質量放出 / 恒星進化 / Ｘ線天文学

Outline of Final Research Achievements

In order to measure "the mass-loss rate of massive star" which is a key of stellar evolution model, X-ray spectroscopic monitoring of elliptical-orbit colliding wind binaries was performed. Since the plasma in the wind-wind collision region emits very strong X-rays, various plasma samples can be obtained by changing the binary separation. By measuring the change in the amount of X-ray absorption, it was possible to calculate mass-loss rate more than twice as accurately as the conventional method. We applied this method to various Colliding wind binaries from 30 days to 10 years of orbital period and succeeded in measuring each mass-loss rate. This study has shown that the new stellar wind measurement method can be applied to the massive binary with various orbital periods.

Academic Significance and Societal Importance of the Research Achievements

初期宇宙で星は大質量星として誕生すると考えられており、大質量星の進化モデルは初期宇宙の研究にも大きな影響を与える。しかしながら、質量放出率の不定性などにより、大質量星の進化は完全には理解できていない。本研究で得られる不定性の少ない大質量星のパラメータは、大質量星の進化モデルに対して制限を与える可能性があり、銀河の化学的・力学的進化理論へのフィードバックが期待される。

Research Products

• [Int'l Joint Research] NASA/GSFC(米国)
• [Int'l Joint Research] エディンバラ大学/シェフィールド大学/リーズ大学(英国)
• [Int'l Joint Research] モントリオール大学(カナダ)
• [Int'l Joint Research] NASA/GSFC(アメリカ)
• [Int'l Joint Research] エディンバラ大学/シェフィールド大学/リーズ大学(イギリス)
• [Int'l Joint Research] モントリオール大学(カナダ)
• [Int'l Joint Research] NASA/GSFC(アメリカ)
• [Int'l Joint Research] エディンバラ大学/シェフィールド大学/リーズ大学(イギリス)
• [Int'l Joint Research] モントリオール大学(カナダ)
• [Journal Article] Hitomi X-ray observation of the pulsar wind nebula G21.5?0.9 (2019)
  • Author(s): Hitomi Collaboration、Aharonian Felix、...、Kohmura Takayoshi...、et al (他191名）
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Pages: 1-16
  • DOI: 10.1093/pasj/psy027
  • 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 Pages: 021402-021402
  • DOI: 10.1117/1.jatis.4.2.021402
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The 7-year MAXI/GSC X-Ray Source Catalog in the High Galactic Latitude Sky (3MAXI) (2018)
  • Author(s): Kawamuro T., Ueda Y., Shidatsu M., Hori T., Morii M., Nakahira S., Isobe N., Kawai N., Mihara T., Matsuoka M., Morita T., Nakajima M., Negoro H., Oda S., Sakamoto T., Serino M., Sugizaki M., Tanimoto A., Tomida H., Tsuboi, Y. 他 11 名
  • Journal Title: The Astrophysical Journal Supplement Series Volume: 238 Pages: 32-32
  • DOI: 10.3847/1538-4365/aad1ef
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Detection of polarized gamma-ray emission from the Crab nebula with Hitomi Soft Gamma-ray Detector (2018)
  • Author(s): Hitomi collaboration
  • Journal Title: Publication: Publications of the Astronomical Society of Japan Volume: 70 Pages: 113-113
  • DOI: 10.1093/pasj/psy118
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The 7-year MAXI/GSC Source Catalog of the Low-Galactic-latitude Sky (3MAXI) (2018)
  • Author(s): Hori T., Shidatsu, M., Ueda, Y., Kawamuro, T., Morii, M., Nakahira, S., Isobe, N., Kawai, N., Mihara T., Matsuoka, M., Morita, T., Nakajima, M., Negoro, H., Oda, S., Sakamoto, T., Serino, M., Sugizaki, M., Tanimoto, A., Tomida, H., Tsuboi, Y. 他 10 名
  • Journal Title: The Astrophysical Journal Suppliment Series Volume: 235 Pages: 7-46
  • DOI: 10.3847/1538-4365/aaa89c
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Atmospheric gas dynamics in the Perseus cluster observed with Hitomi* (2018)
  • Author(s): Hitomi Collaboration, Aya Bamba, et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Pages: 1-31
  • DOI: 10.1093/pasj/psx138
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Measurements of resonant scattering in thePerseus Cluster core with Hitomi SXS (2018)
  • Author(s): Hitomi Collaboration, Aya Bamba, et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Pages: 10-10
  • DOI: 10.1093/pasj/psx127
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Temperature structure in the Perseus cluster core observed with Hitomi* (2018)
  • Author(s): Hitomi Collaboration, Aya Bamba, et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Pages: 11-11
  • DOI: 10.1093/pasj/psy004
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Atomic data and spectral modeling constraints from high-resolution X-ray observations of the Perseus cluster with Hitomi (2018)
  • Author(s): Hitomi Collaboration, Aya Bamba
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Pages: 12-12
  • DOI: 10.1093/pasj/psx156
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Hitomi observation of radio galaxy NGC 1275: The first X-ray microcalorimeter spectroscopy of Fe-Kα line emission from an active galactic nucleus* (2018)
  • Author(s): Hitomi Collaboration, Aya Bamba, et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Pages: 13-13
  • DOI: 10.1093/pasj/psx147
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Search for Thermal X-ray Features from the Crab nebula with Hitomi Soft X-ray Spectrometer (2018)
  • Author(s): Hitomi Collaboration, Aya Bamba, et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Pages: 14-14
  • DOI: 10.1093/pasj/psx072
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Hitomi X-ray studies of Giant Radio Pulses from the Crab pulsar (2018)
  • Author(s): Hitomi Collaboration, Aya Bamba, et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Pages: 15-15
  • DOI: 10.1093/pasj/psx083
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Hitomi Observations of the LMC SNR N132D: Highly Redshifted X-ray Emission from Iron Ejecta (2018)
  • Author(s): Hitomi collaboration, A. Bamba, et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Pages: 16-16
  • DOI: 10.1093/pasj/psx151
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Glimpse of the highly obscured HMXB IGR J16318?4848 with Hitomi* (2018)
  • Author(s): Hitomi Collaboration, A. Bamba et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Pages: 1-17
  • DOI: 10.1093/pasj/psx154
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Multi-messenger Observations of a Binary Neutron Star Merger (2017)
  • Author(s): Abbott B. P., Abbott, R., Abbott, T. D., Acernese, F., Ackley, K., Adams, C., Adams, T., Addesso, P., Adhikari, R. X., Adya, V. B., Affeldt, C., Afrough, M., Agarwal, B., Agathos, M., Agatsuma, K., Aggarwal, N., Aguiar, O. D., Aiello, L., Ain, A., Ajith, P. 他 Negoro, H. 含む 3656 名
  • Journal Title: Astrophysical Journal Letters Volume: 848 Pages: 1-59
  • DOI: 10.3847/2041-8213/aa91c9
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Stellar wind measurements for Colliding Wind Binaries using X-ray observations (2017)
  • Author(s): Sugawara Yasuharu、Maeda Yoshitomo、Tsuboi Yohko
  • Journal Title: Proceedings of the International Astronomical Union Volume: 329 Pages: 448-448
  • DOI: 10.1017/s1743921317003325
• [Journal Article] Solar abundance ratios of the iron-peak elements in the Perseus cluster (2017)
  • Author(s): Aharonian, F., Bamba, A. et al.
  • Journal Title: Nature Volume: 551 Pages: 1-16
  • DOI: 10.1038/nature24301
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] HitomiConstraints on the 3.5 keV Line in the Perseus Galaxy Cluster (2017)
  • Author(s): Aharonian, F. A., Akamatsu, H, Terada, Y. et al (Hitomi collaboration)
  • Journal Title: Astrophysical Jounal Letters Volume: 837 Pages: 15-15
  • DOI: 10.3847/2041-8213/aa61fa
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] X-ray spectral variability of the colliding wind binary WR140 - the origin of the cool plasma component - (2017)
  • Author(s): Yasuharu Sugawara, Yoshitomo Maeda, Kenji Hamaguchi, and Yohko Tsuboi
  • Journal Title: 7 Years of MAXI: monitoring X-ray transients Volume: 1 Pages: 193-194
  • Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] MAXI Data Archive Plan (2017)
  • Author(s): K. Ebisawa, S. Nahahira, Y. Sugawara, S. Ueno, H. Tomida, T. Furusho, T. Mihara, M. Sugizaki, M. Shidatsu, M. Serino, H. Negoro, Y. Nakagawa, and L. Angelini
  • Journal Title: 7 Years of MAXI: monitoring X-ray transients Volume: 1 Pages: 21-24
  • Open Access / Int'l Joint Research
• [Journal Article] Energy spectra of bright clusters of galaxies obtained from the MAXI data archive (2017)
  • Author(s): Tae Furusho, Yasuharu Sugawara, Satoshi Nakahira, and Ken Ebisawa
  • Journal Title: 7 Years of MAXI: monitoring X-ray transients Volume: 1 Pages: 35-36
  • Open Access
• [Journal Article] Stellar flares detected with MAXI for the past 7 years (2017)
  • Author(s): Yohko Tsuboi, Ryo Sasaki, Yumiko Nakamura, Ken Yabuki, Atsushi Kawagoe, Soichiro Kaneto, Yasuharu Sugawara, Hitoshi Negoro, and the MAXI Team
  • Journal Title: 7 Years of MAXI: monitoring X-ray transients Volume: 1 Pages: 175-178
  • Open Access
• [Journal Article] The X-ray luminosities in quiescent phase for superflare stars (2017)
  • Author(s): Ken Yabuki, Yohko Tsuboi, Ryo Sasaki, Yasuharu Sugawara, Satoru Katsuda, and Hiroyuki Maehara
  • Journal Title: 7 Years of MAXI: monitoring X-ray transients Volume: 1 Pages: 187-188
  • Open Access
• [Journal Article] Statistical research of hyper X-ray flares detected with MAXI - a correlation between the quiescent luminosity and the largest flare energy - (2017)
  • Author(s): Ryo Sasaki, Yohko Tsuboi, Satoru Katsuda, Ken Yabuki, Yumiko Nakamura, Yasuharu Sugawara, Masaru Matsuoka, and the MAXI team
  • Journal Title: 7 Years of MAXI: monitoring X-ray transients Volume: 1 Pages: 189-190
  • Open Access
• [Journal Article] Super flare candidates detected by XMM-Newton (2017)
  • Author(s): Y. Nakamura, Y. Tsuboi, Y. Terashima, Y. Sugawara, and S. Katsuda
  • Journal Title: 7 Years of MAXI: monitoring X-ray transients Volume: 1 Pages: 191-192
  • Open Access
• [Journal Article] The quiescent intracluster medium in the core of the Perseus cluster (2016)
  • Author(s): Hitomi Collaboration ; Tsunemi, Hiroshi ; Hayashida, Kiyoshi ; Nakajima, Hiroshi ; and 212 coauthors
  • Journal Title: Nature Volume: 535 Pages: 117-117
  • DOI: 10.1038/nature18627
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] The ASTRO-H (Hitomi) x-ray astronomy satellite (2016)
  • Author(s): Takahashi, T. et al.
  • Journal Title: Proceedings of SPIE Volume: 9905 Pages: 990510-11
  • DOI: 10.1117/12.2232379
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Large X-ray flares on stars detected with MAXI/GSC: A universal correlation between the duration of a flare and its X-ray luminosity (2016)
  • Author(s): Y. Tsuboi, K. Yamazaki, Y. Sugawara, A. Kawagoe, S. Kaneto, R. Iizuka, T. Matsumura, S. Nakahira, M. Higa, M. Matsuoka, M. Sugizaki, Y. Ueda, N. Kawai, M. Morii, M. Serino, T. Mihara, H. Tomida, S. Ueno, H. Negoro, N. Isobe, H. Tsunemi, et al.
  • Journal Title: Publications of the Astronomical Sciety of Japan Volume: 68 Pages: 90-90
  • DOI: 10.1093/pasj/psw081
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Soft and Hard X-Ray Components from Type IIn Supernovae: Evidence for Asphericity in the Circumstellar Medium (2016)
  • Author(s): Katsuda, S., Maeda, K., Bamba, A., Terada, Y., Fukazawa, Y., Kawabata, K., Ohno, M.,Sugawara, Y., Tsuboi, Y.,Immler, S.
  • Journal Title: ApJ Volume: 832 Pages: 194-194
  • DOI: 10.3847/0004-637x/832/2/194
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] 大質量星の電波観測への期待 (2019)
  • Author(s): 菅原泰晴
  • Organizer: 茨城大学重点研究 研究会：「突発・変動現象の電波フォローアップ」
• [Presentation] 星風衝突Wolf-Rayet連星系WR 125のX線光度変動 (2018)
  • Author(s): 御堂岡拓哉, 菅原泰晴, 海老沢研
  • Organizer: 日本天文学会2018年秋季年会
• [Presentation] X線分光を用いたWolf‐Rayet連星系WR 25の星風測定 (2018)
  • Author(s): 菅原泰晴
  • Organizer: 日本天文学会2018年秋季年会
• [Presentation] PhoENiXへの期待：恒星フレアの視点から (2018)
  • Author(s): 菅原泰晴
  • Organizer: 宇宙プラズマにおける粒子加速ワークショップ
• [Presentation] An X-ray study of Wolf-Rayet binaries (2018)
  • Author(s): Yasuharu Sugawara
  • Organizer: IAUS 346: High-mass X-ray binaries: illuminating the passage from massive binaries to merging compact objects
  • Int'l Joint Research
• [Presentation] 2017年にMAXIが発見した新天体と突発現象 (2018)
  • Author(s): 根來均, 中島基樹, 芹野素子, 杉田聡司, 上野史郎, 冨田洋, 磯部直樹, 菅原泰晴, 三原建弘, 杉崎睦, 中平聡志, 岩切渉, 志達めぐみ, 牧島一夫, 河合誠之, 常深博, 吉田篤正, 坂本貴紀, 上田佳宏, 坪井陽子, 山内誠, 山岡和貴, 川室太希, 松岡勝
  • Organizer: 第18回宇宙科学シンポジウム
• [Presentation] X線衛星代替機における科学運用の計画概要 (2018)
  • Author(s): 寺田幸功, 田代信, 高橋弘充, 水野恒史, 田村隆幸, 宇野伸一郎, 久保田あや, 中澤知洋, 渡辺伸, 飯塚亮, 内山秀樹, 海老沢研, 大野雅功, 信川正順, 志達めぐみ, 太田直美, 勝田哲, 山内茂雄, 中島真也, 北口貴雄, 菅原泰晴, 深沢泰司, 田中康之, 坪井陽子, 寺島雄一
  • Organizer: 第18回宇宙科学シンポジウム
• [Presentation] Swift/XMM-NewtonによるWolf-Rayet連星系WR125のX線観測 (2018)
  • Author(s): 菅原泰晴, 前田良知, 坪井陽子
  • Organizer: 日本天文学会2018年春季年会
• [Presentation] XMM-Newton衛星で偶然検出された恒星フレアとその発生源 (2018)
  • Author(s): 中村優美子, 坪井陽子, 本田敏志, 勝田哲, 河合広樹, 菅原泰晴, 佐々木亮, 杉田龍斗
  • Organizer: 日本天文学会2018年春季年会
• [Presentation] 恒星フレア研究のための中央大学36cm望遠鏡:SCATの立ち上げ (2018)
  • Author(s): 河合広樹, 坪井陽子, 飯塚亮, 菅原泰晴, 山田宗次郎
  • Organizer: 日本天文学会2018年春季年会
• [Presentation] X線衛星代替機 XARM における科学運用計画 (2018)
  • Author(s): 寺田幸功, 田代信, 海老沢研, 深沢泰司, 飯塚亮, 勝田哲, 北口貴雄, 久保田あや, 水野恒史, 中島真也, 中澤知洋, 信川正順, 大野雅功, 太田直美, 志達めぐみ, 菅原泰晴, 高橋弘充, 田村隆幸, 田中康之, 寺島雄一, 坪井陽子, 内山秀樹, 宇野伸一郎, 渡辺伸, 山内茂雄
  • Organizer: 日本天文学会2018年春季年会
• [Presentation] 長周期 Wolf-Rayet 連星系 WR 19 の X 線モニタリング観測 I (2017)
  • Author(s): 菅原泰晴, 前田良知, 坪井陽子
  • Organizer: 日本天文学会2017年春季年会
  • Place of Presentation: 福岡大学伊都キャンパス (福岡県・福岡市)
  • Year and Date: 2017-03-15
• [Presentation] 全天X線監視装置MAXI によって得られたRSCVn型星のフレア発生頻度 (2017)
  • Author(s): 佐々木亮, 坪井陽子, 勝田哲, 中村優美子, 菅原泰晴, 松岡勝, 他 MAXI チーム
  • Organizer: 日本天文学会2017年春季年会
  • Place of Presentation: 福岡大学伊都キャンパス (福岡県・福岡市)
  • Year and Date: 2017-03-15
• [Presentation] Chandraによる銀河団SPT-CL J0619-5802のX線対応天体の発見 (2017)
  • Author(s): 宮崎諒平, 坪井陽子, 勝田哲, 上田周太郎, 飯塚亮, 菅原泰晴, 磯部直樹, 北山哲
  • Organizer: 日本天文学会2017年春季年会
  • Place of Presentation: 福岡大学伊都キャンパス (福岡県・福岡市)
  • Year and Date: 2017-03-15
• [Presentation] X線フレアの可視光追観測システムの構築 (2017)
  • Author(s): 河合広樹, 坪井陽子, 山田宗次郎, 飯塚亮, 菅原泰晴
  • Organizer: 日本天文学会2017年春季年会
  • Place of Presentation: 福岡大学伊都キャンパス (福岡県・福岡市)
  • Year and Date: 2017-03-15
• [Presentation] MAXIアーカイブの開発と公開 (2017)
  • Author(s): 海老沢研, 中平聡志, 菅原泰晴, 上野史郎, 冨田洋, 三原建弘, 杉崎睦, 志達めぐみ, 芹野素子, 根来均, 中川友進, Lorella Angelini
  • Organizer: 日本天文学会2017年春季年会
  • Place of Presentation: 福岡大学伊都キャンパス (福岡県・福岡市)
  • Year and Date: 2017-03-15
• [Presentation] 恒星の白色光フレアエネルギーとＸ線フレアエネルギーの統計的調査 (2017)
  • Author(s): Yabuki, Ken; Tsuboi, Yohko; Sasaki, Ryo; Sugawara, Yasuharu; Maehara, Hiroyuki; Katsuda, Satoru
  • Organizer: 第17回宇宙科学シンポジウム
  • Place of Presentation: 宇宙航空研究開発機構宇宙科学研究所相模原キャンパス (神奈川県・相模原市)
  • Year and Date: 2017-01-05
• [Presentation] X線フレアの可視光追観測システムの構築 (2017)
  • Author(s): Kawai, Hiroki; Tsuboi, Yohko; Yamada, Sojiro; Iizuka, Ryo; Sugawara, Yasuharu
  • Organizer: 第17回宇宙科学シンポジウム
  • Place of Presentation: 宇宙航空研究開発機構宇宙科学研究所相模原キャンパス (神奈川県・相模原市)
  • Year and Date: 2017-01-05
• [Presentation] Super flare candidate detected by XMM-Newton (2017)
  • Author(s): Nakamura, Yumiko; Tsuboi, Yohko; Terashima, Yuichi; Sugawara, Yasuharu; Katsuda, Satoru
  • Organizer: 第17回宇宙科学シンポジウム
  • Place of Presentation: 宇宙航空研究開発機構宇宙科学研究所相模原キャンパス (神奈川県・相模原市)
  • Year and Date: 2017-01-05
• [Presentation] The X-ray monitoring of the long-period colliding wind binaries (2017)
  • Author(s): Yasuharu Sugawara, Yoshitomo Maeda, Yohko Tsuboi
  • Organizer: The X-ray Universe 2017
  • Int'l Joint Research
• [Presentation] X-ray variation in colliding wind binaries (2017)
  • Author(s): Yasuharu Sugawara
  • Organizer: Variable Galactic Gamma- Ray Sources (IV)
  • Int'l Joint Research / Invited
• [Presentation] 星のフレアの相関内に見られる微細構造 (2017)
  • Author(s): 坪井陽子, 兼藤聡一郎, 佐々木亮, 中村優美子, 菅原泰晴
  • Organizer: 日本天文学会2017年秋季年会
• [Presentation] 全天X線監視装置MAXIのアーカイブデータを用いたLMC領域の解析 (2017)
  • Author(s): 下向怜歩, 海老沢研, 菅原泰晴, 古庄多恵, 中平聡志
  • Organizer: 日本天文学会2017年秋季年会
• [Presentation] 長周期Wolf-Rayet連星系WR19のX 線モニタリング観測II (2017)
  • Author(s): 菅原泰晴, 前田良知, 坪井陽子
  • Organizer: 日本天文学会2017年秋季年会
• [Presentation] X-ray spectral variability of the colliding wind binary WR140 - the origin of the cool plasma component - (2016)
  • Author(s): Yasuharu Sugawara, Yoshitomo Maeda, Kenji Hamaguchi, Yohko Tsuboi
  • Organizer: 7 years of MAXI : monitoring X-ray transients
  • Place of Presentation: 理化学研究所和光キャンパス (埼玉県・和光市)
  • Year and Date: 2016-12-05
  • Int'l Joint Research
• [Presentation] MAXI Data Archive Plan (2016)
  • Author(s): K. Ebisawa, S. Nahahira, Y. Sugawara, S. Ueno, H. Tomida, T. Furusho, T. Mihara, M. Sugizaki, M. Shidatsu, M. Serino, H. Negoro, Y. Nakagawa, L. Angelini
  • Organizer: 7 years of MAXI : monitoring X-ray transients
  • Place of Presentation: 理化学研究所和光キャンパス (埼玉県・和光市)
  • Year and Date: 2016-12-05
  • Int'l Joint Research
• [Presentation] Energy spectra of bright clusters of galaxies obtained from the MAXI data archive (2016)
  • Author(s): Tae Furusho, Yasuharu Sugawara, Satoshi Nakahira, Ken Ebisawa
  • Organizer: 7 years of MAXI : monitoring X-ray transients
  • Place of Presentation: 理化学研究所和光キャンパス (埼玉県・和光市)
  • Year and Date: 2016-12-05
  • Int'l Joint Research
• [Presentation] Stellar flares detected with MAXI for the past 7 years (2016)
  • Author(s): Yohko Tsuboi, Ryo Sasaki, Yumiko Nakamura, Ken Yabuki, Atsushi Kawagoe, Soichiro Kaneto, Yasuharu Sugawara, Hitoshi Negoro, and the MAXI Team
  • Organizer: 7 years of MAXI : monitoring X-ray transients
  • Place of Presentation: 理化学研究所和光キャンパス (埼玉県・和光市)
  • Year and Date: 2016-12-05
  • Int'l Joint Research
• [Presentation] The X-ray luminosities in quiescent phase for superflare stars (2016)
  • Author(s): Ken Yabuki, Yohko Tsuboi, Ryo Sasaki, Yasuharu Sugawara, Satoru Katsuda, Hiroyuki Maehara
  • Organizer: 7 years of MAXI : monitoring X-ray transients
  • Place of Presentation: 理化学研究所和光キャンパス (埼玉県・和光市)
  • Year and Date: 2016-12-05
  • Int'l Joint Research
• [Presentation] Statistical research of hyper X-ray flares detected with MAXI - a correlation between the quiescent luminosity and the largest flare energy - (2016)
  • Author(s): Ryo Sasaki, Yohko Tsuboi, Satoru Katsuda, Ken Yabuki, Yumiko Nakamura, Yasuharu Sugawara, Masaru Matsuoka, and the MAXI team
  • Organizer: 7 years of MAXI : monitoring X-ray transients
  • Place of Presentation: 理化学研究所和光キャンパス (埼玉県・和光市)
  • Year and Date: 2016-12-05
  • Int'l Joint Research
• [Presentation] Super flare candidates detected by XMM-Newton (2016)
  • Author(s): Y. Nakamura, Y. Tsuboi, Y. Terashima, Y. Sugawara, S. Katsuda
  • Organizer: 7 years of MAXI : monitoring X-ray transients
  • Place of Presentation: 理化学研究所和光キャンパス (埼玉県・和光市)
  • Year and Date: 2016-12-05
  • Int'l Joint Research
• [Presentation] Stellar Wind Measurements for Colliding Wind Binaries Using X-Ray Observations (2016)
  • Author(s): Yasuharu Sugawara, Yoshitomo Maeda, Yohko Tsuboi
  • Organizer: IAUS 329 The lives and death throes of Massive stars
  • Place of Presentation: オークランド (ニュージランド)
  • Year and Date: 2016-11-28
  • Int'l Joint Research
• [Presentation] Wolf-Rayet星WR140における低温プラズマのX線変動調査 (2016)
  • Author(s): 菅原泰晴, 前田良知, 濱口健二, 坪井陽子
  • Organizer: 日本天文学会2016年秋季年会
  • Place of Presentation: 愛媛大学 (愛媛県・松山市)
  • Year and Date: 2016-09-14
• [Presentation] XMM-Newton衛星で検出されたスーパーフレア星候補天体 (2016)
  • Author(s): 中村優美子, 坪井陽子, 寺島雄一, 勝田哲, 菅原泰晴
  • Organizer: 日本天文学会2016年秋季年会
  • Place of Presentation: 愛媛大学 (愛媛県・松山市)
  • Year and Date: 2016-09-14
• [Presentation] 26cm口径可視光望遠鏡によるフレア観測に向けた自動観測システムの構築 (2016)
  • Author(s): 山田宗次郎, 坪井陽子, 飯塚亮, 菅原泰晴, 三宅梢子
  • Organizer: 日本天文学会2016年秋季年会
  • Place of Presentation: 愛媛大学 (愛媛県・松山市)
  • Year and Date: 2016-09-14