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階層的構造形成論に基づく銀河の化学進化より探るrプロセスの起源

Research Project

Project/Area Number 26400232
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Astronomy
Research InstitutionInternational Christian University

Principal Investigator

石丸 友里  国際基督教大学, 教養学部, 上級准教授 (90397068)

Co-Investigator(Kenkyū-buntansha) 青木 和光  国立天文台, TMT推進室, 准教授 (20321581)
和南城 伸也  上智大学, 理工学部, 准教授 (30327879)
Project Period (FY) 2014-04-01 – 2018-03-31
Project Status Granted (Fiscal Year 2016)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords宇宙物理 / 理論天文学 / 光学赤外線天文学 / 重元素 / 銀河形成 / 中性子星合体 / 金属欠乏星
Outline of Annual Research Achievements

本研究は,研究代表者(石丸)を中心に開発している (A) 階層的構造形成論に基づく銀河の化学進化モデルを主軸とし,研究分担者(和南城)を中心に推進している (B) rプロセスの元素合成モデル計算と,研究分担者(青木)を中心とした (C) すばる望遠鏡・VLT望遠鏡による金属欠乏星および矮小銀河の星の化学組成の測定を連携させることによって進めている。
平成28年度は, (A)モンテカルロ法を用いて、様々な質量のサブハローで発生する中性子星合体によるrプロセス元素の化学進化モデルを構築した。さらにそれらを質量関数に従って積算した銀河系ハローモデルを、金属欠乏星の観測値と比較することにより、rプロセス元素の起源天体として、中性子星合体が最有力であることを示した。この結果は,6月上旬、6月下旬、9月に開催された3件の国際学会にて発表した。さらに現在、査読論文に投稿準備中である。
研究分担者・研究協力者との連携も計画通りに行われた。(B) では、中性子星合体によるrプロセス元素の元素合成の最新モデルによる計算が行われ、その計算結果は上記のモンテカルロ法によるサブハローの化学進化モデルに反映された。(C) については,サブハローの進化と密接に関連した矮小銀河の化学組成についての観測計画(PI: 研究協力者 青木みさ,Co-I: 石丸,青木)を4月に実施し、良好な結果が得られた.観測データは現在解析中である。
その他、平成27年度以前に行った本研究に関連した研究についての成果を、2本の査読論文として出版した。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

平成27年度までの研究成果は、すでに査読論文として出版済みである。平成28年度には、予定通りモンテカルロ法を用いたサブハローの化学進化モデルを構築することができた。また、すばる望遠鏡による観測データも取得することができた。概ね順調に研究計画は進展しているが、平成28年度に得られた研究成果については、平成29年度内に査読論文誌に投稿する予定となった。

Strategy for Future Research Activity

本研究は、当初は平成28年度で終了予定であった。計画していた研究は平成28年度の前半に一定の成果が得られたが、さらに平成28年度後半には、さらに発展的な成果を得ることができた。これらをまとめて、平成29年度に査読論文に投稿予定である。

Expenditure Plan for Carryover Budget

論文投稿料として使用する

Report

(3 results)
  • 2016 Research-status Report
  • 2015 Research-status Report
  • 2014 Research-status Report
  • Research Products

    (36 results)

All 2017 2016 2015 2014 Other

All Int'l Joint Research (2 results) Journal Article (13 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 12 results,  Open Access: 10 results,  Acknowledgement Compliant: 4 results) Presentation (21 results) (of which Int'l Joint Research: 3 results,  Invited: 4 results)

  • [Int'l Joint Research] パリ天体物理学研究所/パリ天文台(フランス)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] パリ天体物理学研究所/パリ天文台(フランス)

    • Related Report
      2015 Research-status Report
  • [Journal Article] Early chemo-dynamical evolution of dwarf galaxies deduced from enrichment of r-process elements2017

    • Author(s)
      Yutaka Hirai, Yuhri Ishimaru, Takayuki R Saitoh, Michiko S Fujii, Jun Hidaka, Toshitaka Kajino
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 466 Issue: 2 Pages: 2474-2487

    • DOI

      10.1093/mnras/stw3342

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Diversity of Abundance Patterns of Light Neutron-capture Elements in Very-metal-poor Stars2017

    • Author(s)
      Misa Aoki, Yuhri Ishimaru, Wako Aoki, Shinya Wanajo
    • Journal Title

      The Astrophysical Journal

      Volume: 837 Issue: 1 Pages: 8-16

    • DOI

      10.3847/1538-4357/aa5d08

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Enrichment of R-Process Elements by Neutron Star Mergers Through the Sub-Halo Clustering2017

    • Author(s)
      Ishimaru, Y., Ojima, T., Wanajo, S., Prantzos, N.
    • Journal Title

      Proceedings of the 14th International Symposium on Nuclei in the Cosmos, JPS Conf. Proc.

      Volume: 14 Pages: 020210-3

    • DOI

      10.7566/jpscp.14.020210

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Stochastic Chemical Evolution of Sub-Halos and the Origin of R-Process Elements2017

    • Author(s)
      Ojima, T., Ishimaru, Y., Wanajo, S., Prantzos, N.
    • Journal Title

      Proceedings of the 14th International Symposium on Nuclei in the Cosmos, JPS Conf. Proc.

      Volume: 14 Pages: 020208-3

    • DOI

      10.7566/jpscp.14.020208

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Abundance of Weak r-process Elements of Metal-Poor Stars ~Universality or Diversity?~2017

    • Author(s)
      Aoki, M., Ishimaru, Y., Aoki, W., Wanajo, S.
    • Journal Title

      Proceedings of the 14th International Symposium on Nuclei in the Cosmos, JPS Conf. Proc.

      Volume: 14 Pages: 020302-3

    • DOI

      10.7566/jpscp.14.020302

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Chemo-Dynamical Evolution of r-process Elements in the Local Group Galaxies2017

    • Author(s)
      Yutaka Hirai, Yuhri Ishimaru, Takayuki R Saitoh, Michiko S Fujii, Jun Hidaka, Toshitaka Kajino
    • Journal Title

      JPS Conference Proceedings

      Volume: 14 Pages: 020204-020204

    • DOI

      10.7566/jpscp.14.020204

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Chemo-dynamical evolution model: Enrichment of r-process elements in the Local Group dwarf galaxies2016

    • Author(s)
      Yutaka Hirai, Yuhri Ishimaru, Takayuki R Saitoh, Michiko S Fujii, Jun Hidaka, Toshitaka Kajino
    • Journal Title

      Proceedings of the International Astronomical Union

      Volume: S317 Issue: S317 Pages: 308-309

    • DOI

      10.1017/s1743921315007139

    • Related Report
      2016 Research-status Report
    • Open Access / Acknowledgement Compliant
  • [Journal Article] Neutron Star Mergers as the Origin of r-Process Elements in the Galactic Halo Based on the Sub-halo Clustering Scenario2015

    • Author(s)
      石丸 友里, 和南城 伸也, Nikos Prantzos
    • Journal Title

      The Astrophysical Journal Letters

      Volume: 804 Issue: 2 Pages: L35-L35

    • DOI

      10.1088/2041-8205/804/2/l35

    • Related Report
      2015 Research-status Report 2014 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Enrichment of r-process Elements in Dwarf Spheroidal Galaxies in Chemo-dynamical Evolution Model2015

    • Author(s)
      Hirai, Yutaka; Ishimaru, Yuhri; Saitoh, Takayuki R.; Fujii, Michiko S.; Hidaka, Jun; Kajino, Toshitaka
    • Journal Title

      The Astrophysical Journal

      Volume: 814 Issue: 1 Pages: 41-41

    • DOI

      10.1088/0004-637x/814/1/41

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Chemo-dynamical evolution model: Enrichment of r-process elements in the Local Group dwarf galaxies2015

    • Author(s)
      Hirai, Yutaka; Ishimaru, Yuhri; Saitoh, Takayuki R.; Fujii, Michiko S.; Hidaka, Jun; Kajino, Toshitaka
    • Journal Title

      IAU General Assembly, Meeting

      Volume: #29

    • Related Report
      2015 Research-status Report
    • Peer Reviewed
  • [Journal Article] Astrophysical site(s) of r-process elements in galactic chemodynamical evolution model2015

    • Author(s)
      Hirai, Yutaka; Ishimaru, Yuhri; Saitoh, Takayuki R.; Fujii, Michiko S.; Hidaka, Jun; Kajino, Toshitaka
    • Journal Title

      EPJ Web of Conferences

      Volume: 109 Pages: 02001-02001

    • DOI

      10.1051/epjconf/201610902001

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Compact binary mergers as the origin of r-process elements in the Galactic halo2014

    • Author(s)
      Ishimaru, Y., Wanajo, S., & Prantzos, N
    • Journal Title

      AIP Conference Proceedings in : ORIGIN OF MATTER AND EVOLUTION OF GALAXIES 2013 (ed. S. Jeong , N. Imai , H. Miyatake & T. Kajino)

      Volume: Vol. 1594 Pages: 46-46

    • DOI

      10.1063/1.4874043

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [Journal Article] Diversity of abundance patterns of neutron-capture elements in very metal-poor stars2014

    • Author(s)
      Aoki, M., Aoki, W., Ishimaru, Y., & Wanajo, S
    • Journal Title

      AIP Conference Proceedings in : ORIGIN OF MATTER AND EVOLUTION OF GALAXIES 2013 (ed. S. Jeong , N. Imai , H. Miyatake & T. Kajino)

      Volume: Vol. 1594 Pages: 123-123

    • DOI

      10.1063/1.4874056

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [Presentation] Chemical evolution of the Galactic halo with neutron star mergers based on the sub-halo clustering scenario2016

    • Author(s)
      Y. Ishimaru
    • Organizer
      IAP workshop on The Milky Way and its environment: gaining insights into the drivers of galaxy formation and evolution
    • Place of Presentation
      L’institut d’Astrophysique de Paris, Paris, France
    • Year and Date
      2016-09-19
    • Related Report
      2016 Research-status Report
  • [Presentation] Origin of r-process elements and nuclear cosmo-chronology2016

    • Author(s)
      S. Wanajo, Y. Sekiguchi N. Nishimura, K.Kiuchi, K. Kyutoku, M. Shibata, K. Hotokezaka, M. Tanaka
    • Organizer
      IAP workshop on The Milky Way and its environment: gaining insights into the drivers of galaxy formation and evolution
    • Place of Presentation
      L’institut d’Astrophysique de Paris, Paris, France
    • Year and Date
      2016-09-19
    • Related Report
      2016 Research-status Report
  • [Presentation] Sextans Dwarf Galaxy as a Hint to the Evolution of the Milky Way2016

    • Author(s)
      M. Aoki, Y. Ishimaru, W. Aoki
    • Organizer
      IAP workshop on The Milky Way and its environment: gaining insights into the drivers of galaxy formation and evolution
    • Place of Presentation
      L’institut d’Astrophysique de Paris, Paris, France
    • Year and Date
      2016-09-19
    • Related Report
      2016 Research-status Report
  • [Presentation] Towards understanding the Milky Way formation: Insight from the enrichment of r-process elements2016

    • Author(s)
      Y. Hirai, Y. Ishimaru, T. R. Saitoh, M. S. Fujii, J. Hidaka, T. Kajino
    • Organizer
      IAP workshop on The Milky Way and its environment: gaining insights into the drivers of galaxy formation and evolution
    • Place of Presentation
      L’institut d’Astrophysique de Paris, Paris, France
    • Year and Date
      2016-09-19
    • Related Report
      2016 Research-status Report
  • [Presentation] 中性子星合体によるrプロセスに基づくサブハローの確率論的化学進化2016

    • Author(s)
      石丸友里, 小嶋琢也, 和南城伸也, N. Prantzos
    • Organizer
      日本天文学会2016年秋季年会
    • Place of Presentation
      愛媛大学, 松山市
    • Year and Date
      2016-09-14
    • Related Report
      2016 Research-status Report
  • [Presentation] すばる HDS によるろくぶんぎ座矮小銀河の重元素組成の解析2016

    • Author(s)
      青木みさ, 青木和光, 石丸友里
    • Organizer
      日本天文学会2016年秋季年会
    • Place of Presentation
      愛媛大学, 松山市
    • Year and Date
      2016-09-14
    • Related Report
      2016 Research-status Report
  • [Presentation] 銀河の力学進化から探る超金属欠乏星の rプロセス元素組成2016

    • Author(s)
      平居悠, 石丸友里, 斎藤貴之, 藤井通子, 日高潤, 梶野敏貴
    • Organizer
      日本天文学会2016年秋季年会
    • Place of Presentation
      愛媛大学, 松山市
    • Year and Date
      2016-09-14
    • Related Report
      2016 Research-status Report
  • [Presentation] Enrichment of R-Process Elements by Neutron Star Mergers Through the Sub-Halo Clustering2016

    • Author(s)
      Y. Ishimaru, T. Ojima, S. Wanajo, N. Prantzos
    • Organizer
      14th International Symposium on Nuclei in the Cosmos (NIC2016)
    • Place of Presentation
      Toki Messe, Niigata, Japan
    • Year and Date
      2016-06-19
    • Related Report
      2016 Research-status Report
  • [Presentation] Stochastic Chemical Evolution of Sub-Halos and the Origin of R-Process Elements2016

    • Author(s)
      T. Ojima, Y. Ishimaru, S. Wanajo, N. Prantzos
    • Organizer
      14th International Symposium on Nuclei in the Cosmos (NIC2016)
    • Place of Presentation
      Toki Messe, Niigata, Japan
    • Year and Date
      2016-06-19
    • Related Report
      2016 Research-status Report
  • [Presentation] Abundance of Weak r-process Elements of Metal-Poor Stars ~Universality or Diversity?~2016

    • Author(s)
      M. Aoki, Y. Ishimaru, W. Aoki, S. Wanajo
    • Organizer
      14th International Symposium on Nuclei in the Cosmos (NIC2016)
    • Place of Presentation
      Toki Messe, Niigata, Japan
    • Year and Date
      2016-06-19
    • Related Report
      2016 Research-status Report
  • [Presentation] Chemo-dynamical Evolution of r-process Elements in the Local Group Galaxies2016

    • Author(s)
      Y. Hirai, Y. Ishimaru, T. Saitoh, M. Fujii, J. Hidaka, T. Kajino
    • Organizer
      14th International Symposium on Nuclei in the Cosmos (NIC2016)
    • Place of Presentation
      Toki Messe, Niigata, Japan
    • Year and Date
      2016-06-19
    • Related Report
      2016 Research-status Report
  • [Presentation] The origin of r-process elements deduced from the Galactic chemical evolution2016

    • Author(s)
      Y. Ishimaru
    • Organizer
      ICNT workshop on The r-process nucleosynthesis: connecting FRIB with the cosmos
    • Place of Presentation
      Michigan State University, East Lansing, USA
    • Year and Date
      2016-05-31
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] LAMOSTで検出された [Fe/H]< -3.5 の天体のすばる HDS による rプロセス元素組成の解析2015

    • Author(s)
      青木みさ, 青木和光, H. N. Li, 石丸友里
    • Organizer
      日本天文学会2015年秋季年会
    • Place of Presentation
      甲南大学, 神戸市
    • Year and Date
      2015-09-09
    • Related Report
      2015 Research-status Report
  • [Presentation] 異なる質量の矮小銀河における rプロセス元素分布2015

    • Author(s)
      平居悠, 石丸友里,斎藤貴之, 藤井通子, 日高潤,梶野敏貴
    • Organizer
      日本天文学会2015年秋季年会
    • Place of Presentation
      甲南大学, 神戸市
    • Year and Date
      2015-09-09
    • Related Report
      2015 Research-status Report
  • [Presentation] Chemo-dynamical evolution model: Enrichment of r-process elements in the Local Group dwarf galaxies2015

    • Author(s)
      Hirai, Yutaka; Ishimaru, Yuhri; Saitoh, Takayuki R.; Fujii, Michiko S.; Hidaka, Jun; Kajino, Toshitaka
    • Organizer
      IAU Symposium 317: The general assembly of galaxy halos: Structure, origin and evolution
    • Place of Presentation
      Honolulu, Hawaii, USA
    • Year and Date
      2015-08-03
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Astrophysical site(s) of r-process elements in galactic chemo-dynamical evolution model2015

    • Author(s)
      Hirai, Yutaka; Ishimaru, Yuhri; Saitoh, Takayuki R.; Fujii, Michiko S.; Hidaka, Jun; Kajino, Toshitaka
    • Organizer
      International Symposium on Origin of Matter and Evolution of Galaxies
    • Place of Presentation
      北京, 中国
    • Year and Date
      2015-06-24
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Chemical Evolution of R-process Elements Based on the Sub-halo Clustering Scenario2015

    • Author(s)
      Ishimaru, Yuhri; Shinya Wanajo; Nikos, Prantzos
    • Organizer
      First stars, galaxies and black holes; Now and Then
    • Place of Presentation
      Groningen, The Netherlands
    • Year and Date
      2015-06-15
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Chemical evolution of r-process elements2015

    • Author(s)
      石丸 友里
    • Organizer
      12th Russbach School on Nuclear Astrophysics
    • Place of Presentation
      Russbach, Austria
    • Year and Date
      2015-03-08 – 2015-03-18
    • Related Report
      2014 Research-status Report
    • Invited
  • [Presentation] Chemical Evolution of r-Process Elements - Who is the "Alchemist" in Our Galaxy?2015

    • Author(s)
      石丸 友里
    • Organizer
      基研研究会「コンパクト連星合体からの重力波・電磁波放射とその周辺領域」
    • Place of Presentation
      京都大学, 京都, 日本
    • Year and Date
      2015-02-12 – 2015-02-14
    • Related Report
      2014 Research-status Report
    • Invited
  • [Presentation] Origins of light trans-Fe and r-process elements deduced from Galactic chemical evolution2014

    • Author(s)
      石丸 友里
    • Organizer
      Fourth Joint Meeting of the Nuclear Physics Divisions of the American Physical Society and The Physical Society of Japan
    • Place of Presentation
      Hilton Waikaoloa Village, Hawaii, USA
    • Year and Date
      2014-10-07 – 2014-10-11
    • Related Report
      2014 Research-status Report
  • [Presentation] Chemical evolution of r-process elements2014

    • Author(s)
      石丸 友里
    • Organizer
      ECT* Workshop: Nuclear Physics and Astrophysics of Neutron-Star Mergers and Supernovae, and the Origin of R-Process Elements
    • Place of Presentation
      ECT*, Trento, Italy
    • Year and Date
      2014-09-08 – 2014-09-12
    • Related Report
      2014 Research-status Report
    • Invited

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Published: 2014-04-04   Modified: 2022-02-08  

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