Investigation of the mechanism of stellar flares by high speed spectroscopy
Project/Area Number |
17H02865
|
Research Category |
Grant-in-Aid for Scientific Research (B)
|
Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Astronomy
|
Research Institution | Kyoto University |
Principal Investigator |
|
Project Period (FY) |
2017-04-01 – 2020-03-31
|
Project Status |
Completed (Fiscal Year 2019)
|
Budget Amount *help |
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2019: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2018: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2017: ¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000)
|
Keywords | 恒星フレア / 太陽フレア / 黒点 / 分光観測 / 測光観測 / 多波長観測 / 磁場 / 質量放出 / 装置開発 / 可視光高速分光器 / Kepler宇宙望遠鏡 / データ解析 / 光学赤外線天文学 |
Outline of Final Research Achievements |
We clarified in 2012 that solar-type stars could cause superflares having energies over ten times larger than that of largest solar flares observed so far, based on the data obtained by Kepler spacecraft. In this program, our analyses of data by Kepler and others exhibited that the relationship between the flare duration and energy and the emergence/decay rates of starspots are consistent with those of the Sun. This suggests common underlying physical processes between solar flares and stellar superflares. We also presented that the Halpha emission profile of an M-type star during a flare showed a continuously blue-shifted component which has not been seen in the Sun and a pre-research result of impacts of stellar superflares on exoplanet atmosphere.
|
Academic Significance and Societal Importance of the Research Achievements |
今回の成果は恒星で観測されるスーパーフレアが太陽フレアと同じ物理プロセスで起こることを示唆するものであり、太陽フレアのメカニズムがこれまで考えられていたよりも4桁は大きいエネルギーでも通用することと、太陽でもスーパーフレアが起こりうることを意味する。また、スーパーフレアが惑星大気に与える影響の予備的研究成果は、将来的に太陽が地球環境や地球の生命に与えてきている研究につながるものである。
|
Report
(4 results)
Research Products
(55 results)
-
-
-
-
-
-
-
[Journal Article] Impact of Stellar Superflares on Planetary Habitability2019
Author(s)
Yamashiki Yosuke A.、Maehara Hiroyuki、Airapetian Vladimir、Notsu Yuta、Sato Tatsuhiko、Notsu Shota、Kuroki Ryusuke、Murashima Keiya、Sato Hiroaki、Namekata Kosuke、Sasaki Takanori、Scott Thomas B.、Bando Hina、Nashimoto Subaru、Takagi Fuka、Ling Cassandra、Nogami Daisaku、Shibata Kazunari
-
Journal Title
The Astrophysical Journal
Volume: 881
Issue: 2
Pages: 114-114
DOI
Related Report
Peer Reviewed / Int'l Joint Research
-
[Journal Article] Lifetimes and Emergence/Decay Rates of Star Spots on Solar-type Stars Estimated by Kepler Data in Comparison with Those of Sunspots2019
Author(s)
Namekata, Kosuke; Maehara, Hiroyuki; Notsu, Yuta; Toriumi, Shin; Hayakawa, Hisashi; Ikuta, Kai; Notsu, Shota; Honda, Satoshi; Nogami, Daisaku; Shibata, Kazunari
-
Journal Title
The Astrophysical Journal
Volume: 871
Issue: 2
Pages: 187-187
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
-
-
[Journal Article] Statistical Studies of Solar White-light Flares and Comparisons with Superflares on Solar-type Stars2017
Author(s)
Namekata, K., Sakaue, T., Watanabe, K., Asai, A., Maehara, H., Notsu, Y., Notsu, S., Honda, S., Ishii, T. T., Ikuta, K., Nogami, D., Shibata, K.
-
Journal Title
The Astrophysical Journal
Volume: 851
Issue: 2
Pages: 91-91
DOI
Related Report
Peer Reviewed
-
-
[Presentation] Blue asymmetries of Balmer lines during M-dwarf flares investigated with multi-wavelength observations2020
Author(s)
Notsu, Y.; Kowalski, A.; Maehara, H.; Namekata, K.; Hawley, S.; Davenport, J.; Enoto, T.; Hamaguchi, K.; Honda, S.; Notsu, S.; Ikuta, K.; Nogami, D.; Shibata, K.
Organizer
American Astronomical Society meeting #235
Related Report
Int'l Joint Research
-
[Presentation] 多波長モニタ観測で探るM型星フレアのバルマー線の輝線輪郭非対称性2020
Author(s)
野津湧太, Adam Kowalski, 前原裕之, 行方宏介, 本田敏志, 榎戸輝揚 (理研), 濱口健二, 野津翔太, 岡本壮師, 幾田佳, 野上大作, 柴田一成, James Davenport, Suzanne Hawley
Organizer
日本天文学会2020年春季年会
Related Report
-
-
[Presentation] 恒星フレアの多波長モニタ観測 ~OISTER と TESS/NICER の連携~2020
Author(s)
行方宏介, 前原裕之, 岡本壮師, 野上大作, 柴田一成, 本田敏志, 野 津湧太, A. Kowalski, 佐々木亮, 河合広樹, 岩切 渉, 坪井陽子, 他 OISTER team
Organizer
日本天文学会2020年春季年会
Related Report
-
[Presentation] 中小口径望遠鏡と TESS の連携によるフレア星 EV Lac の測光分光同時観測2020
Author(s)
前原裕之, 行方宏介, 岡本壮師, 野上大作, 柴田一成, 野津湧太, 本田敏志, 村瀬洸太郎, 村田勝寛, 安達稜, 飯田康太, 大枝幹, 小川風太, 白石一輝, 戸間紗也香, 細川 稜平, 松村良太, 藤井大地, 松本桂, 安藤和子, 山村春香, 田畑佳美, 福田尚也, 赤澤秀彦, 伊藤弘, 清田誠一郎, 水谷正則, 白神憲一
Organizer
日本天文学会2020年春季年会
Related Report
-
-
[Presentation] Do superflares really occur on slowly-rotating Sun-like stars in the long-term activity changes? -Latest statistical results using Kepler and Gaia-DR2 data-2019
Author(s)
Notsu, Yuta; Maehara, Hiroyuki; Honda, Satoshi; Hawley, Suzanne L.; Davenport, James R. A.; Namekata, Kosuke; Notsu, Shota; Ikuta, Kai; Nogami, Daisaku; Shibata, Kazunari
Organizer
SHINE Conference 2019
Related Report
Int'l Joint Research
-
[Presentation] Lifetimes and emergence/decay rates of star spots on solar-type stars estimated by Kepler data in comparison with those of sunspots2019
Author(s)
Namekata, Kosuke; Maehara, H.; Davenport, J.; Morris, B.; Hawley, S.; Notsu, Y.; Toriumi, S.; Hayakawa, H.; Honda, S.; Notsu, S.; Ikuta, K.; Nogami, D.; Shibata, K.
Organizer
SHINE Conference 2019
Related Report
Int'l Joint Research
-
-
-
[Presentation] Superflares on GKM-type Stars2019
Author(s)
Nogami, Daisaku; Maehara, Hiroyuki; Notsu, Yuta; Honda, Satoshi; Notsu, Shota; Namekata, Kosuke; Ikuta, Kai; Seki, Takaaki; Okamoto, Soushi; Shibata, Kazunari
Organizer
Stars and their Variability observed from space
Related Report
Int'l Joint Research
-
[Presentation] 光赤外線大学間連携と TESS によるフレア星 YZ CMi の測光分光同時観測2019
Author(s)
前原裕之, 本田敏志, 野津湧太, 野津翔太, 行方宏介, 幾田佳, 野上大作, 柴田一成, 山中雅之, 加藤則行, 大島誠人, 村田勝寛, 飯田康太, 大枝幹, 高木健吾, 笹田真人, 秋田谷洋, 他光赤外線大学間連携メンバー
Organizer
日本天文学会2019年秋季年会
Related Report
-
[Presentation] せいめい望遠鏡の初期観測成果:M 型星 AD Leo の恒星フレアの連続分光2019
Author(s)
行方宏介, 前原裕之, 佐々木亮, 河合広樹, 岩切 渉, 坪井陽子, 野津湧太, 本田敏志, 岡本壮師, 野上大作, 柴田一成, 他 OISTER team
Organizer
日本天文学会2019年秋季年会
Related Report
-
-
-
-
-
[Presentation] G, K, M 型星の恒星黒点の統計的性質とフレア活動性との関係2019
Author(s)
前原裕之, 野津湧太, 野津翔太, 行方宏介, 幾田佳, 野上大作, 柴田一成, 山敷庸亮, 本田敏志
Organizer
日本天文学会2019年春季年会
Related Report
-
[Presentation] 惑星トランジットを用いた、空間分解された恒星黒点の面積の時間変化の推定2019
Author(s)
行方宏介, James Davenport, Brett Morris, Suzanne Hawley, 前原裕之, 野津湧太, 野津翔太, 幾田佳, 野上大作, 柴田一成, 本田敏志
Organizer
日本天文学会2019年春季年会
Related Report
-
-
[Presentation] Do Kepler superflare stars really include slowly-rotating Sun-like stars? -Results using spectroscopic observations and Gaia-DR2 data-2019
Author(s)
Notsu, Yuta; Maehara, Hiroyuki; Honda, Satoshi; Hawley, S.; Davenport, J.; Kowalski, A.; Namekata, Kosuke: Notsu, Shota; Ikuta, Kai; Nogami, Daisaku; Shibata, Kazunari
Organizer
Flux Emergency Workshop 2019
Related Report
Int'l Joint Research
-
[Presentation] Statistical Studies of Solar White-light Flares and Comparisons with Superflares on Solar-type Stars2018
Author(s)
Namekata, Kosuke; Ishii, Takako; Watanabe, Kyoko; Shibata, Kazunari; Asai, Ayumi; Notsu, Yuta; Honda, Satoshi; Maehara, Hiroyuki; Notsu, Shota; Nogami, Daisaku; Sakaue, Takahito; Ikuta, Kai
Organizer
42nd COSPAR Scientific Assembly
Related Report
Int'l Joint Research
-
-
[Presentation] Spectroscopic observations of Kepler/TESS solar-type supeflare stars2018
Author(s)
Notsu, Yuta; Maehara, Hiroyuki; Honda, Satoshi; Hawley, Suzanne; Davenport, James; Notsu, Shota; Namekata, Kosuke; Ikuta, Kai; Nogami, Daisaku; Shibata, Kazunari
Organizer
The 20th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun
Related Report
Int'l Joint Research
-
[Presentation] Lifetime, Emerging and Decay Rates of Starspots on Solar-type Stars Estimated by Kepler Data and Comparisons with Sunspots2018
Author(s)
Namekata, Kosuke; Maehara, Hiroyuki; Notsu, Yuta; Hayakawa, Hisashi; Ikuta, Kai Ikuta; Notsu, Shota; Honda, Satoshi; Nogami, Daisaku; Shibata, Kazunari
Organizer
The 20th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun
Related Report
Int'l Joint Research
-
-
-
[Presentation] Superflares on Solar-Type Stars2018
Author(s)
Nogami, Daisaku; Maehara, Hiroyuki; Notsu, Yuta; Ikuta, Kai; Namekata, Kosuke; Notsu, Shota; Honda, Satoshi; Shibata, Kazunari
Organizer
XXXth IAU General Assembly, Focus Meeting FM9: Solar Irradiance: Physics-Based Advances
Related Report
Int'l Joint Research
-
[Presentation] STATISTICAL STUDIES OF SOLAR WHITE-LIGHT FLARES AND COMPARISONS WITH SUPERFLARES ON SOLAR-TYPE STARS2018
Author(s)
Namekata, Kosuke; Sakaue, Takahito; Watanabe, Kyoko; Asai, Ayumi; Maehara, Hiroyuki; Notsu, Yuta; Notsu, Shota; Honda, Satoshi; Ishii, T. Takako; Ikuta, Kai; Nogami, Daisaku; Shibata, Kazunari
Organizer
HINODE-12 THE MANY SUNS
Related Report
Int'l Joint Research
-
-
[Presentation] 恒星フレア影響の評価に向けた、太陽系外惑星データベースExoKyotoの整備2018
Author(s)
山敷庸亮, 野津湧太, 前原裕之, 佐藤達彦, 黒木龍介, 佐藤啓明, 村嶋 慶哉, 野津翔太, 佐々木貴教, 坂東日菜, 梨元昴, 高木風香, 野上大作, 柴田一成, 他ExoKyoto開発チーム
Organizer
日本天文学会 2018 年秋季年会
Related Report
-
-
-
-
-
-
-
-
-
-
-
-
-