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Revealing the environments of long-duration gamma-ray bursts with molecular gas and dust observations

Research Project

Project/Area Number 15K17616
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Astronomy
Research InstitutionThe University of Tokyo (2016-2018)
National Astronomical Observatory of Japan (2015)

Principal Investigator

Hatsukade Bunyo  東京大学, 大学院理学系研究科(理学部), 助教 (70719484)

Project Period (FY) 2015-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords銀河 / ガンマ線バースト / 分子ガス / 星形成 / 電波 / 銀河形成 / 銀河進化 / ダスト
Outline of Final Research Achievements

Long-duration gamma-ray bursts (GRBs) are thought to be due to the explosion of massive stars. We observed molecular gas, the fuel for star formation, in host galaxies of GRBs by using ALMA to examine the environment of GRB birthplace. We successfully detected molecular gas in 16 hosts. This is the largest sample among existing studies, allowing us to study statistically the hosts in terms of molecular gas for the first time. We found that star-formation efficiency and gas consumption timescale in the hosts can be explained by the same scaling law as normal star-forming galaxies. This suggests that GRBs occur in normal star-forming environments.

Academic Significance and Societal Importance of the Research Achievements

ロング・ガンマ線バースト(GRB)は、短時間にガンマ線が宇宙から観測される現象で、巨大な星が一生を終える際の大爆発であると考えられている。宇宙最大規模の爆発現象であるが、そのメカニズムは発生環境についてはまだ解明されていない点が多い。本研究では、GRBがどのような環境で発生するのかを探るため、これまで観測が進んでいなかった分子ガス(星形成の材料)に着目した。アルマ望遠鏡を用いてGRBが発生した銀河(母銀河)の観測を行い、既存の研究の中で最大のサンプルを構築した。これにより初めて統計的な研究に基づいてGRBが一般的な環境で発生することを示唆する結果を得た。

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

    (16 results)

All 2019 2018 2017 2016 2015 Other

All Int'l Joint Research (2 results) Journal Article (5 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 4 results,  Open Access: 1 results,  Acknowledgement Compliant: 2 results) Presentation (9 results) (of which Int'l Joint Research: 6 results,  Invited: 1 results)

  • [Int'l Joint Research] National Tsing Hua University(その他の国・地域(台湾))

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Eotvos Lorand University/Hungarian Academy of Sciences(ハンガリー)

    • Related Report
      2018 Annual Research Report
  • [Journal Article] MOLECULAR GAS PROPERTIES IN THE HOST GALAXY OF GRB 0802072019

    • Author(s)
      Bunyo Hatsukade, Tetsuya Hashimoto, Kotaro Kohno, Kouichiro Nakanishi, Kouji Ohta, Yuu Niino, Yoichi Tamura, L. Viktor Toth
    • Journal Title

      Astrophysical Journal

      Volume: 印刷中

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Obscured Star Formation in the Host Galaxies of Superluminous Supernovae2018

    • Author(s)
      Hatsukade B.、Tominaga N.、Hayashi M.、Konishi M.、Matsuda Y.、Morokuma T.、Morokuma-Matsui K.、Motogi K.、Niinuma K.、Tamura Y.
    • Journal Title

      The Astrophysical Journal

      Volume: 857 Issue: 1 Pages: 72-72

    • DOI

      10.3847/1538-4357/aab616

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Gamma-ray bursts from dusty regions with little molecular gas2016

    • Author(s)
      Hatsukade, Bunyo; Ohta, Kouji; Endo, Akira; Nakanishi, Kouichiro; Tamura, Yoichi; Hashimoto, Tetsuya; Kohno, Kotaro
    • Journal Title

      Proceedings of the IAU

      Volume: 28B Issue: A29B Pages: 274-275

    • DOI

      10.1017/s1743921316005329

    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Journal Article] High-resolution ALMA observations of SDP.81. II. Molecular clump properties of a lensed submillimeter galaxy at z = 3.0422015

    • Author(s)
      Hatsukade, B., Tamura, Y., Iono, D., Matsuda, Y., Hayashi, M., Oguri, M.
    • Journal Title

      Publications of Astronomical Soc of Japan

      Volume: 67 Issue: 5 Pages: 937-937

    • DOI

      10.1093/pasj/psv061

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Optical-Infrared Properties of Faint 1.3 mm Sources Detected with ALMA2015

    • Author(s)
      Hatsukade, B., Ohta, K., Yabe, K., Seko, A., Makiya, R., Akiyama, M.
    • Journal Title

      Astrophysical Journal

      Volume: 810 Issue: 2 Pages: 91-91

    • DOI

      10.1088/0004-637x/810/2/91

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] Science Cases for High-z Objects2019

    • Author(s)
      B. Hatsukade, K. Kohno, Y. Yoshimura, Y. Tamura
    • Organizer
      Power of wideband receiver: Exploring sciences at 7mm wavelength with large single dish telescopes, NAOJ-ASIAA Joint Workshop
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 超高輝度超新星母銀河における隠された星形成2018

    • Author(s)
      廿日出文洋、冨永望、林将央、松田有一、小西真広、諸隈智貴、諸隈佳菜、元木業人、新沼浩太郎、田村陽一
    • Organizer
      日本天文学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] ガンマ線バースト母銀河における分子ガス探査2017

    • Author(s)
      廿日出文洋, 太田耕司, 河野孝太郎, 田村陽一, 中西康一郎, 橋本哲也, 遠藤光
    • Organizer
      日本天文学会2017年春季年会
    • Place of Presentation
      九州大学伊都キャンパス(福岡県福岡市)
    • Year and Date
      2017-03-15
    • Related Report
      2016 Research-status Report
  • [Presentation] Molecular Gas in the Host Galaxies of Long-duration Gamma-ray Bursts2017

    • Author(s)
      Bunyo Hatsukade, Kouji Ohta, Kotaro Kohno, Kouichiro Nakanishi, Yoichi Tamura, Tetsuya Hashimoto, Akira Endo
    • Organizer
      International Astronomical Union, Asian-Pacific Regional Meeting
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Molecular Gas in the Host Galaxies of Long-duration Gamma-ray Bursts2016

    • Author(s)
      B. Hatsukade, K. Ohta, K. Kohno, K. Nakanishi, Y. Tamura, A. Endo, T. Hashimoto
    • Organizer
      The Eighth Huntsville Gamma-Ray Burst Symposium
    • Place of Presentation
      THE WESTIN HUNTSVILLE, Alabama, United States
    • Year and Date
      2016-10-24
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] High-resolution ALMA observations of SDP.81: Molecular clump properties of a lensed submillimeter galaxy at z = 3.0422015

    • Author(s)
      Bunyo Hatsukade
    • Organizer
      EA ALMA Science Workshop 2015
    • Place of Presentation
      大阪府立大学I-siteなんば(大阪府、大阪市)
    • Year and Date
      2015-12-09
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] ALMAによるSDP.81の高分解能観測 II. - 重力レンズされたz=3.042サブミリ波銀河の分子ガスクランプの性質2015

    • Author(s)
      廿日出文洋, 伊王野大介, 松田有一, 林将央, 田村陽一, 大栗真宗
    • Organizer
      日本天文学会2015年秋季年会
    • Place of Presentation
      甲南大学(兵庫県、神戸市)
    • Year and Date
      2015-09-09
    • Related Report
      2015 Research-status Report
  • [Presentation] Gamma-ray bursts from dusty regions with little molecular gas2015

    • Author(s)
      Bunyo Hatsukade
    • Organizer
      The 29th International Astronomical Union General Assembly
    • Place of Presentation
      Honolulu, Hawaii, the United States of America
    • Year and Date
      2015-08-03
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Gamma-ray bursts from dusty regions with little molecular gas2015

    • Author(s)
      Hatsukade, B., Ohta, K., Endo, A., Nakanishi, K., Tamura, Y., Hashimoto, T., Kohno, K.
    • Organizer
      Gas, Dust, and Star-Formation in Galaxies from the Local to Far Universe
    • Place of Presentation
      Chania, Crete, Greece
    • Year and Date
      2015-05-25
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research

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Published: 2015-04-16   Modified: 2022-08-19  

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