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Research of mass-accretion and mass-ejection processes of young stellar objects by spectro-polarimetry of near-infrared emission lines

Research Project

Project/Area Number 15K05023
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Astronomy
Research InstitutionHiroshima University (2015-2016, 2018)
Saitama University (2017)

Principal Investigator

Akitaya Hiroshi  広島大学, 宇宙科学センター, 研究員 (60450186)

Co-Investigator(Renkei-kenkyūsha) KAWABATA Koji  
YOSHIDA Michitoshi  
MORITANI Yuki  
WATANABE Makoto  
Project Period (FY) 2015-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywords天文学 / 前主系列星 / 赤外線 / 偏光 / 若い恒星状天体 / 近赤外線 / 分光 / 光・赤外線天文学
Outline of Final Research Achievements

Our universe is filled with stars as our Sun, which borns within a very short period of 1-10 million years. Physical processes at an area close to the star by a few stellar radii in their young era is important to understand their birth process.
We are clarifying motion and distribution of gas around a young star by spectro-polarimetry of their emission lines, which is unique approach to investigate the area close to the star. We reduced near-infrared spectro-polarimetry data of young stars obtained by the Hiroshima Optical and Near-InfraRed camera (HONIR) attached to the 1.5-m Kanata telescope, Higashi-Hiroshima Observatory of Hiroshima Astrophysical Science Center, Hiroshima University.

Academic Significance and Societal Importance of the Research Achievements

本研究では、星々の直近のガスが近赤外線で放つ光(輝線)の直線偏光を測定し、星が生まれつつある現場の物質の運動と分布を明らかにすることを狙った。当初は輝線の偏光を十分に抽出する新機能を広島大学かなた望遠鏡の観測装置HONIR(オニール)に追加装着する予定であったが、やむを得ない進捗の遅れのため、過去に取得が済んでいた予備的な観測データの解析と、今後の研究完遂のための環境を整備するに留まった。
しかし近赤外線の偏光分光観測は天文学の観測研究分野で希少かつユニークな手法である。本研究で整備した環境は若い天体や星周物質をもつ天体の観測に活用でき、今後の観測研究の発展に大きく寄与する。

Report

(5 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (13 results)

All 2019 2018 2017 2016 Other

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 3 results) Presentation (7 results) Remarks (1 results)

  • [Journal Article] Comparison of polarization at two lunar eclipse events2019

    • Author(s)
      Takahashi Jun、Itoh Yoichi、Watanabe Makoto、Akitaya Hiroshi、Takaki Katsutoshi、Kawabata Koji S、Itoh Ryosuke、Oasa Yumiko
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 71 Issue: 2 Pages: 47-47

    • DOI

      10.1093/pasj/psz017

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] High polarization degree of the continuum of comet 2P/Encke based on spectropolarimetric signals during its 2017 apparition2018

    • Author(s)
      Kwon Y. G.、Ishiguro M.、Shinnaka Y.、Nakaoka T.、Kuroda D.、Hanayama H.、Takahashi J.、Baar S.、Saito T.、Kawabata M.、Uemura M.、Morokuma T.、Murata K. L.、Takagi S.、Morihana K.、Nagayama T.、Sekiguchi K.、Kawabata K. S.、Akitaya H.
    • Journal Title

      Astronomy & Astrophysics

      Volume: 620 Pages: A161-A161

    • DOI

      10.1051/0004-6361/201833968

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] X-Ray, Optical, and Near-infrared Monitoring of the New X-Ray Transient MAXI J1820+070 in the Low/Hard State2018

    • Author(s)
      Shidatsu Megumi, Nakahira Satoshi, Yamada Satoshi, Kawamuro Taiki, Ueda Yoshihiro, Negoro Hitoshi, Murata Katsuhiro L., Itoh Ryosuke, Tachibana Yutaro, Adachi Ryo, Yatsu Yoichi, Kawai Nobuyuki, Hanayama Hidekazu, Horiuchi Takashi, Akitaya Hiroshi, Saito Tomoki, Takayama Masaki, Ohshima Tomohito 他 11 名
    • Journal Title

      The Astrophysical Journal

      Volume: 868 Issue: 1 Pages: 54-54

    • DOI

      10.3847/1538-4357/aae929

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The Low-luminosity Type IIP Supernova 2016bkv with Early-phase Circumstellar Interaction2018

    • Author(s)
      Nakaoka T.、Kawabata K.S.、Maeda K.、Tanaka M.、Yamanaka M.、Moriya T.J.、Tominaga N.、Morokuma T.、Takaki K.、Kawabata M.、Kawahara N.、Itoh R.、Shiki K.、Mori H.、Hirochi J.、Abe T.、Uemura M.、Yoshida M.、Akitaya H.、Moritani Y.、Ueno I.、Urano T.、Isogai M.、Hanayama H.、Nagayama T.
    • Journal Title

      The Astrophysical Journal

      Volume: 859 Issue: 2 Pages: 78-78

    • DOI

      10.3847/1538-4357/aabee7

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A measurement of interstellar polarization and an estimation of Galactic extinction for the direction of the X-ray black hole binary V404 Cygni2017

    • Author(s)
      Itoh, Ryosuke; Tanaka, Yasuyuki T.; Kawabata, Koji S.; Uemura, Makoto; Watanabe, Makoto; Fukazawa, Yasushi; Kanda, Yuka; Akitaya, Hiroshi; Moritani, Yuki; Nakaoka, Tatsuya; Kawabata, Miho; Shiki, Kensei; Yoshida, Michitoshi; Oasa, Yumiko; Takahashi, Jun
    • Journal Title

      PASJ

      Volume: 印刷中 Issue: 2 Pages: 25-31

    • DOI

      10.1093/pasj/psw130

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] 埼玉大学SaCRA望遠鏡・装置と突発天体観測対応の現状2018

    • Author(s)
      秋田谷 洋
    • Organizer
      木曽シュミットシンポジウム2018開催
    • Related Report
      2018 Annual Research Report
  • [Presentation] SaCRA望遠鏡の自動観測・即時解析化に向けた環境構築2018

    • Author(s)
      秋田谷 洋
    • Organizer
      第9回光・赤外線大学間連携ワークショップ
    • Related Report
      2018 Annual Research Report
  • [Presentation] 可視赤外線同時カメラ HONIR における一露出型含む偏光モードの性能評価2018

    • Author(s)
      長木舞子, 川端弘治, 中岡竜也, 川端美穂, 森裕樹, 松場祐樹 (広島大), 伊藤亮介 (東京工業大), 秋田谷 洋 (埼玉大), 吉田道利 (国立天文台)
    • Organizer
      日本天文学会2018年春季年会(千葉大学)
    • Related Report
      2017 Research-status Report
  • [Presentation] かなた望遠鏡可視赤外線同時カメラHONIRへの分解能を高めた偏光分光機能搭載の計画2017

    • Author(s)
      秋田谷 洋
    • Organizer
      第7回可視赤外線観測装置技術ワークショップ
    • Related Report
      2017 Research-status Report
  • [Presentation] 可視近赤外線同時カメラHONIRにおける一露出型偏光観測モードの性能評価2017

    • Author(s)
      長木舞子、川端弘治、中岡竜也、川端美穂 (広島大学)、伊藤亮介 (東京工業大)、秋田谷洋 (茨城大)、 吉田道利 (国立天文台)
    • Organizer
      日本天文学会2017年秋季年会(北海道大学)
    • Related Report
      2017 Research-status Report
  • [Presentation] 東広島天文台HONIRにおける近赤外バックグラウンド放射の季節依存性2016

    • Author(s)
      中岡 竜也, 川端 弘治, 秋田谷 洋, 植村 誠, 伊藤 亮介, 宇井 崇紘, 川端 美穂, 神田 優花, 高木 勝俊, 高田 紘司, 吉田 道利 (広島大), 森谷 友由希 (東京大), 山下 卓也 (国立天文台)
    • Organizer
      日本天文学会2016年春季年会
    • Place of Presentation
      首都大学
    • Year and Date
      2016-03-14
    • Related Report
      2015 Research-status Report
  • [Presentation] かなた望遠鏡用可視赤外線同時カメラHONIRの偏光分光観測機能2016

    • Author(s)
      秋田谷 洋
    • Organizer
      第21回天体スペクトル研究会
    • Place of Presentation
      甲南大学
    • Year and Date
      2016-02-27
    • Related Report
      2015 Research-status Report
  • [Remarks] Hiroshima Optical and Near-infrared Camera HONIR

    • URL

      http://hasc.hiroshima-u.ac.jp/instruments/honir/

    • Related Report
      2016 Research-status Report

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Published: 2015-04-16   Modified: 2020-03-30  

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