• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Superflares investigated with spectroscopic observations and their effects on planetary habitability

Research Project

Project/Area Number 22KJ1261
Project/Area Number (Other) 21J00106 (2021-2022)
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeMulti-year Fund (2023)
Single-year Grants (2021-2022)
Section国内
Review Section Basic Section 16010:Astronomy-related
Research InstitutionTokyo Institute of Technology

Principal Investigator

野津 湧太  東京工業大学, 理学院, 特別研究員(PD)

Project Period (FY) 2023-03-08 – 2024-03-31
Project Status Declined (Fiscal Year 2023)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2023: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsスーパーフレア / 恒星フレア / プラズマ噴出 / フレア / 光赤外線天文学 / 太陽物理学 / 恒星物理学 / 系外惑星
Outline of Research at the Start

近年の我々の研究により、年齢に伴うフレア発生率の変化など、恒星スーパーフレアの統計的性質が明らかになってきた。しかし、 「フレアの前提条件である巨大黒点の生成や、スーパーフレア中のエネルギー解放の過程が、何桁も小さな太陽フレアの場合と同様の物理過程で全て説明可能か?」、「スーパーフレアに伴って惑星に影響を与えるプ ラズマ噴出の規模」、といった核心的問いが未だ解決されていない。本研究では、「分光」観測を主軸とした多波長連携観測を通して、以上の問いに迫り、太陽を含む恒星の一生にわたるスーパーフレア活動について確定的描像を得る。そして、惑星環境への影響も含めて幅広く議論する、新分野の開拓を目指す。

Outline of Annual Research Achievements

米国AP天文台3.5m望遠鏡、岡山天文台3.8mなどの地上望遠鏡、さらにTESS衛星やX線観測装置NICERやXMM-Newton衛星で取得された、スーパーフレアを頻発する星の多波長連携観測データについての解析を進めた。特に、スーパーフレアに伴うプラズマ噴出や彩層放射の規模や時間発展について探査した。この観測研究の過程においては、観測データの輻射流体力学的な解釈や米国望遠鏡を用いた観測研究の推進のため、コロラド大学に長期滞在してAdam Kowalski氏他と共同研究を実施した。共著論文が3編出版された他、主著論文と共著論文を1編投稿した(前者は査読コメント対応中, 後者は2023年4月に受理)。また、岡山188cm望遠鏡/HIDESやすばる望遠鏡IRD等でこれまでに長期モニタ観測された, 活動的なF, G, K, M型星のデータを用いて、黒点や彩層放射の長期変化を調べる研究も、受入研究者の佐藤氏及び大学院生とともに共同で推進し、共著論文が1編出版された他、博士/修士論文として成果がまとめられた。 また、恒星EUV推定に向けた太陽データの活用 (2編の共著論文が出版)や、惑星分野との連携に向けた研究の検討など、分野連携に向けた検討/研究も大きく進めることができた。

Research Progress Status

翌年度、交付申請を辞退するため、記入しない。

Strategy for Future Research Activity

翌年度、交付申請を辞退するため、記入しない。

Report

(2 results)
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (44 results)

All 2023 2022 2021 Other

All Int'l Joint Research (5 results) Journal Article (9 results) (of which Int'l Joint Research: 7 results,  Peer Reviewed: 9 results,  Open Access: 8 results) Presentation (24 results) (of which Int'l Joint Research: 13 results,  Invited: 6 results) Book (1 results) Remarks (5 results)

  • [Int'l Joint Research] コロラド大学/ワシントン大学/NASAゴダード宇宙飛行センター(米国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] オウル大学(フィンランド)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Ondrejov Observatory(チェコ)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] コロラド大学/ワシントン大学/NASAゴダード宇宙飛行センター(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] オウル大学(フィンランド)

    • Related Report
      2021 Annual Research Report
  • [Journal Article] A Superflare on YZ Canis Minoris Observed by the Seimei Telescope and TESS2023

    • Author(s)
      Namizaki, Keiichi; Namekata, Kosuke; Maehara, Hiroyuki ; Notsu, Yuta ; Honda, Satoshi ; Nogami, Daisaku ; Shibata, Kazunari
    • Journal Title

      Astrophysical Journal

      Volume: 945 Issue: 1 Pages: 61-61

    • DOI

      10.3847/1538-4357/acb928

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Reconstructing the XUV Spectra of Active Sun-like Stars Using Solar Scaling Relations with Magnetic Flux2023

    • Author(s)
      Namekata Kosuke、Toriumi Shin、Airapetian Vladimir S.、Shoda Munehito、Watanabe Kyoko、Notsu Yuta
    • Journal Title

      The Astrophysical Journal

      Volume: 945 Issue: 2 Pages: 147-147

    • DOI

      10.3847/1538-4357/acbe38

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Magnetic activity variability from Hα line intensive monitoring of two F-type stars with a hot Jupiter, τ Bootis A and υ Andromedae A2023

    • Author(s)
      Lee Sanghee、Notsu Yuta、Sato Bun’ei
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 75 Issue: 2 Pages: 446-461

    • DOI

      10.1093/pasj/psad010

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Detection of a High-velocity Prominence Eruption Leading to a CME Associated with a Superflare on the RS CVn-type Star V1355 Orionis2023

    • Author(s)
      Inoue, Shun ; Maehara, Hiroyuki ; Notsu, Yuta ; Namekata, Kosuke ; Honda, Satoshi ; Namizaki, Keiichi ; Nogami, Daisaku ; Shibata, Kazunari
    • Journal Title

      Astrophysical Journal

      Volume: 948 Issue: 1 Pages: 9-9

    • DOI

      10.3847/1538-4357/acb7e8

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Starspot mapping with adaptive parallel tempering. II. Application to TESS data for M-dwarf flare stars, AU Microscopii, YZ Canis Minoris, and EV Lacertae2023

    • Author(s)
      Ikuta Kai, Namekata Kosuke, Notsu Yuta, et al.
    • Journal Title

      The Astrophysical Journal in press

      Volume: - Issue: 1 Pages: 64-64

    • DOI

      10.3847/1538-4357/acbd36

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A Seven-Day Multi-Wavelength Flare Campaign on AU Mic I: High-Time Resolution Light Curves and the Thermal Empirical Neupert Effect2023

    • Author(s)
      Tristan Isaiah I., Notsu, Yuta, Kowalski Adam A., et al.
    • Journal Title

      The Astrophysical Journal in press

      Volume: -

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Universal Scaling Laws for Solar and Stellar Atmospheric Heating: Catalog of Power-law Index between Solar Activity Proxies and Various Spectral Irradiances2022

    • Author(s)
      Toriumi Shin、Airapetian Vladimir S.、Namekata Kosuke、Notsu Yuta
    • Journal Title

      The Astrophysical Journal Supplement Series

      Volume: 262 Issue: 2 Pages: 46-46

    • DOI

      10.3847/1538-4365/ac8b15

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Discovery of a Long-duration Superflare on a Young Solar-type Star EK Draconis with Nearly Similar Time Evolution for Hα and White-light Emissions2022

    • Author(s)
      Namekata Kosuke、Maehara Hiroyuki、Honda Satoshi、Notsu Yuta、Okamoto Soshi、Takahashi Jun、Takayama Masaki、Ohshima Tomohito、Saito Tomoki、Katoh Noriyuki、Tozuka Miyako、Murata Katsuhiro L.、Ogawa Futa、Niwano Masafumi、Adachi Ryo、Oeda Motoki、Shiraishi Kazuki、Isogai Keisuke、Nogami Daisaku、Shibata Kazunari
    • Journal Title

      The Astrophysical Journal Letters

      Volume: 926 Issue: 1 Pages: L5-L5

    • DOI

      10.3847/2041-8213/ac4df0

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Probable detection of an eruptive filament from a superflare on a solar-type star2021

    • Author(s)
      Namekata Kosuke、et al.
    • Journal Title

      Nature Astronomy

      Volume: 6 Issue: 2 Pages: 241-248

    • DOI

      10.1038/s41550-021-01532-8

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] M型星フレアの彩層線輝線輪郭の青方偏移現象 III: M型星のコロナ質量放出2023

    • Author(s)
      野津湧太 他
    • Organizer
      本天文学会2023年春季年会 N33a
    • Related Report
      2022 Annual Research Report
  • [Presentation] Recent updates of superflares and starspots2022

    • Author(s)
      Yuta Notsu
    • Organizer
      2nd meeting of ISSI team "Solar Extreme Events: Setting Up a Paradigm"
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Toward understanding stellar CME sources: Recent observational studies of stellar flares and (erupting) stellar prominences2022

    • Author(s)
      Yuta Notsu
    • Organizer
      Splinter session “Solar and stellar coronal mass ejections” Cool stars 21
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] High-time resolution physics in stellar flares from a 7-day multi-wavelength campaign on young planet-hosting M dwarf flare star AU Mic2022

    • Author(s)
      Yuta Notsu
    • Organizer
      Cool Stars 21
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Blue asymmetries in Balmer lines and possible mass ejections during mid M dwarf flares2022

    • Author(s)
      Yuta Notsu
    • Organizer
      Session D2.2 Connecting Solar and Stellar Coronal Mass Ejections: Lessons Learned, Challenges an d Perspectives, COSPAR 202
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Recent Observations of Stellar Flares and Possible Mass Ejections2022

    • Author(s)
      Yuta Notsu
    • Organizer
      The 15th Asia Pacific Physics Conference (APPC15)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent results of our multi-wavelength observations of M-dwarf flares2022

    • Author(s)
      Yuta Notsu
    • Organizer
      Plasma Explosions in the Universe (PEU2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Recent Observations of Stellar Flares and Possible Mass Ejections2022

    • Author(s)
      Yuta Notsu
    • Organizer
      The 6th Asia-Pacific Conference on Plasma Physics (AAPPS-DPP2022) e-conference
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 基礎事項&最近の研究 : 恒星磁気活動(フレア, 黒点, 自転)観測2022

    • Author(s)
      野津湧太
    • Organizer
      セッションC01/C02 多波長観測で明らかにする太陽・低質量星の磁気活動
    • Related Report
      2022 Annual Research Report
  • [Presentation] Recent topics of stellar superflare studies2022

    • Author(s)
      野津湧太
    • Organizer
      Stellar magnetic workshop 2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] PhoENiX mission: 恒星フレア研究・系外惑星研究への展開2022

    • Author(s)
      野津湧太
    • Organizer
      太陽研究者連絡会 2022年度将来計画シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] M型星フレアの彩層線輝線輪郭の青方偏移現象 II: NICERでのX線同時観測2022

    • Author(s)
      野津湧太 他
    • Organizer
      日本天文学会2022年秋季年会 M32a
    • Related Report
      2022 Annual Research Report
  • [Presentation] Stellar spin-down relations from young cluster observations of JASMINE2022

    • Author(s)
      野津湧太 他
    • Organizer
      日本天文学会2022年秋季年会 Z227b
    • Related Report
      2022 Annual Research Report
  • [Presentation] Blue wing asymmetries in chromospheric lines during mid M dwarf flares from simultaneous spectroscopic and photometric observation data2022

    • Author(s)
      野津湧太
    • Organizer
      連星系・変光星研究会2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] Recent observations of superflares on solar-type stars over various ages, and possible mass ejections2022

    • Author(s)
      Yuta Notsu
    • Organizer
      Fifty years of the Skumanich Relations
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] M 型星フレア中における、彩層線輝線輪郭の青方偏移現象の分光・測光観測2022

    • Author(s)
      野津湧太
    • Organizer
      太陽研連シンポジウム2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] M型星フレア中における、彩層線輝線輪郭の青方偏移現象の分光・測光観測2022

    • Author(s)
      野津湧太 他
    • Organizer
      日本天文学会2022年春季年会M44a
    • Related Report
      2021 Annual Research Report
  • [Presentation] 太陽型星スーパーフレア観測と、太陽での極端宇宙天気現象の可能性2022

    • Author(s)
      野津湧太
    • Organizer
      地磁気誘導電流(GIC)研究会2021 (第471回生存圏シンポジウム
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Blue asymmetries in Balmer lines during mid M dwarf flares2021

    • Author(s)
      Yuta Notsu
    • Organizer
      2021 APO Science Symposium
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] tatistical Properties of Superflares on Solar-type Stars: Results Using All of the Kepler Primary Mission Data2021

    • Author(s)
      Yuta Notsu
    • Organizer
      AOGS2021, Talk No. ST08-A008
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Blue asymmetries in Balmer lines during mid M dwarf flares2021

    • Author(s)
      Notsu, Yuta ; Shibata, Kazunari ; Enoto, Teruaki ; Hamaguchi, Kenji ; Honda, Satoshi ; Maehara, Hiroyuki ; Nogami, Daisaku ; Namekata, Kosuke ; Ikuta, Kai ; Kowalski, Adam ; Hawley, Suzanne ; Davenport, James ; Okamoto, Soshi ; Notsu, Shota
    • Organizer
      TESS Science Conference II
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Statistical Properties of Superflares on Solar-type Stars: Results Using All of the Kepler Primary Mission Data2021

    • Author(s)
      Yuta Notsu
    • Organizer
      1st workshop of ISSI team "Solar Extreme Events: Setting Up a Paradigm"
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Recent observations of stellar flares on G-, K-, and M-dwarf stars and possible mass ejections2021

    • Author(s)
      Yuta Notsu
    • Organizer
      AGU2021 Session U43B - Cool Stars and Their Influence on (Exo)Planetary Habitability I,
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] High-time resolution physics in stellar flares from a 7-day multi-wavelength campaign on young planet-hosting M dwarf flare star AU Mic2021

    • Author(s)
      野津湧太 他
    • Organizer
      日本天文学会2021年秋季年会M10b
    • Related Report
      2021 Annual Research Report
  • [Book] Solar-Terrestrial Environmental Prediction2023

    • Author(s)
      Kusano Kanya et al. (including Yuta Notsu)
    • Total Pages
      462
    • Publisher
      Springer Nature Singapore
    • ISBN
      9789811977657
    • Related Report
      2022 Annual Research Report
  • [Remarks] Webpage of Yuta Notsu

    • URL

      https://sites.google.com/colorado.edu/yutanotsu/home

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
  • [Remarks] 共著論文に関する記者発表

    • URL

      https://www.kyoto-u.ac.jp/ja/research-news/2023-04-28-0

    • Related Report
      2022 Annual Research Report
  • [Remarks] 東京工業大学HPでの研究紹介

    • URL

      https://educ.titech.ac.jp/eps/news/2021_12/061603.html

    • Related Report
      2021 Annual Research Report
  • [Remarks] コロラド大学HPでの研究紹介

    • URL

      https://www.colorado.edu/today/2021/12/09/ek-draconis

    • Related Report
      2021 Annual Research Report
  • [Remarks] 太陽地球圏環境予測 オープン・テキストブック (PSTEP Open Textbook)を公開

    • URL

      https://nagoya.repo.nii.ac.jp/search?page=1&size=100&sort=controlnumber&search_type=2&q=1621213872938

    • Related Report
      2021 Annual Research Report

URL: 

Published: 2021-05-27   Modified: 2024-03-26  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi