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X-ray study of metal distribution in the hot gas and stellar initial mass function

Research Project

Project/Area Number 25400235
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Astronomy
Research InstitutionTokyo University of Science

Principal Investigator

Matsushita Kyoko  東京理科大学, 理学部, 教授 (50366423)

Co-Investigator(Renkei-kenkyūsha) SATO Kosuke  東京理科大学, 理学部第一部, 助教 (50453840)
Research Collaborator SASAKI Toru  
ICHIKAWA Kazuya  
KONAMI Saori  
Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
KeywordsX線 / 銀河 / 銀河団 / 化学進化 / 構造形成 / X線天文学 / 初期質量関数 / 星形成史 / フィードバック
Outline of Final Research Achievements

Clusters of galaxies are the largest gravitationally bound systems in the Universe. At the same time, clusters can be used as the laboratory for the study of thermal and chemical evolution of the universe in which baryons play the most important role. X-ray observations give us valuable information about the structure formation, gas heating and cooling, and metal enrichment of clusters of galaxies.
Thanks to the low and stable background, the Suzaku satellite has enabled us to unveil intracluster medium (ICM) beyond a half of the virial radius. We studied the distributions of metal abundances and metal-mass-to-light ratios and gas-mass-to-light ratios and discussed the origin of metals, slope of initial mass function of stars, and early-metal enrichment in these systems. In addition, we compared the results from the Suzaku data with those from the Planck satellite and weak-lensing observations and discussed the entropy flattening at cluster outskirts.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (26 results)

All 2016 2015 2014 2013

All Journal Article (9 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 9 results,  Open Access: 4 results,  Acknowledgement Compliant: 3 results) Presentation (17 results) (of which Invited: 2 results)

  • [Journal Article] Suzaku observations of a shock front tracing the western edge of the giant radio halo in the Coma Cluster2016

    • Author(s)
      Yuusuke Uchida, Aurora Simionescu, Tadayuki Takahashi, Norbert Werner, Yuto Ichinohe, Steven W. Allen, Ondrej Urban, Kyoko Matsushita
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 印刷中 Issue: SP1

    • DOI

      10.1093/pasj/psv126

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Central Mass Profiles of the Nearby Cool-core Galaxy Clusters Hydra A and A4782016

    • Author(s)
      N. Okabe, K. Umetsu, T. Tamura, Y. Fujita, M. Takizawa, K. Matsushita, Y. Fukazawa, T. Futamase, M. Kawaharada, S. Miyazaki, Y. Mochizuki, K. Nakazawa, T. Ohashi, N. Ota, T. Sasaki, K. Sato, & S. I. Tam
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 456 Issue: 4 Pages: 4475-4487

    • DOI

      10.1093/mnras/stv2916

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A New Black Hole Mass Estimate for Obscured Active Galactic Nuclei2015

    • Author(s)
      Minezaki T. and Matsushita K.
    • Journal Title

      The Astrophysical Journal

      Volume: 802 Issue: 2 Pages: 98-104

    • DOI

      10.1088/0004-637x/802/2/98

    • Related Report
      2015 Annual Research Report 2014 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Suzaku Observations of Subhalos in the Coma Cluster2015

    • Author(s)
      Sasaki, Toru; Matsushita, Kyoko; Sato, Kosuke; Okabe, Nobuhiro
    • Journal Title

      The Astrophysical Journal

      Volume: 806, Issue 1 Issue: 1 Pages: 123-123

    • DOI

      10.1088/0004-637x/806/1/123

    • NAID

      120006554908

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Testing a generalized cubic Galileon gravity model with the Coma Cluster2015

    • Author(s)
      Ayumu Terukina, Kazuhiro Yamamoto, Nobuhiro Okabe, Kyoko Matsushita, Toru Sasaki
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: Issue 10 Issue: 10 Pages: 064-064

    • DOI

      10.1088/1475-7516/2015/10/064

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Temperature and entropy profiles to the virial radius of the Abell 1246 cluster observed with Suzaku2014

    • Author(s)
      Sato, Kosuke; Matsushita, Kyoko; Yamasaki, Noriko Y.; Sasaki, Shin; Ohashi, Takaya
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 66 Issue: 5 Pages: 310-315

    • DOI

      10.1093/pasj/psu061

    • NAID

      40020264736

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Universal profiles of the intracluster medium from Suzaku X-ray and Subaru weak-lensing observations2014

    • Author(s)
      N. Okabe, K. Uetsu, T. Tamura, Y. Fujita, M. Takizawa, Y.-Y. Zhang, K. Matsushita, T. Hamana, Y. Fukazawa, Yasushi, T. Futamase, M. Kawaharada, S. Miyazaki, Y. Mochizuki, K. Nakazawa, T. Ohashi, N. Ota, T. Sasaki, K. Sato, S. Tam
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 66 Issue: 5 Pages: 99-99

    • DOI

      10.1093/pasj/psu075

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Metal Distributions out to 0.5 r 180 in the Intracluster Medium of Four Galaxy Groups Observed with Suzaku2014

    • Author(s)
      Toru Sasaki, Kyoko Matsushita, Kosuke Sato
    • Journal Title

      The Astrophysical Journal

      Volume: 781 Issue: 1 Pages: 23-23

    • DOI

      10.1088/0004-637x/781/1/36

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Abundance Patterns in the Interstellar Medium of Early-type Galaxies Observed with Suzaku2014

    • Author(s)
      Saori Konami, Kyoko Matsushita, Ryo Nagino, Toru Tamagawa
    • Journal Title

      Astrophysical Journal

      Volume: 783 Issue: 1 Pages: 8-8

    • DOI

      10.1088/0004-637x/783/1/8

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Presentation] 「すざく」で観測した銀河団・銀河群のガス質量と鉄質量-銀河光度比2016

    • Author(s)
      佐々木亨, 松下恭子, 佐藤浩介, 栗山翼, 菅野祐 (東京理科大学)
    • Organizer
      日本天文学会2016年春季年会
    • Place of Presentation
      首都大学東京
    • Year and Date
      2016-03-14
    • Related Report
      2015 Annual Research Report
  • [Presentation] ASTRO-H」SXS による観測シミュレーションを用いた銀河団中心部に おける共鳴散乱の影響の評価2016

    • Author(s)
      古川愛生, 松下恭子, 佐藤浩介(東京理科大学), 深澤泰司, 枝廣育実(広島大学)
    • Organizer
      日本天文学会2016年春季年会
    • Place of Presentation
      首都大学東京
    • Year and Date
      2016-03-14
    • Related Report
      2015 Annual Research Report
  • [Presentation] 銀河団方向の X 線源の数と銀河団観測への影響2016

    • Author(s)
      栗山翼, 松下恭子, 佐藤浩介, 佐々木亨 (東京理科大学)
    • Organizer
      日本天文学会2016年春季年会
    • Place of Presentation
      首都大学東京
    • Year and Date
      2016-03-14
    • Related Report
      2015 Annual Research Report
  • [Presentation] 「すざく」衛星で観測されたビリアル半径までの Abell 262 銀河団の鉄質 量–銀河光度比2015

    • Author(s)
      菅野祐、松下恭子、佐々木亨、佐藤浩介 (東京理科大学)、一戸悠人 (ISAS/JAXA)
    • Organizer
      日本天文学会2015年秋季年会
    • Place of Presentation
      甲南大学
    • Year and Date
      2015-09-09
    • Related Report
      2015 Annual Research Report
  • [Presentation] 「すざく」衛星による Abell2163 銀河団による銀河団外縁部までの観測2015

    • Author(s)
      伊東雅史、松下恭子、佐藤浩介 (東京理科大学)、太田直美 (奈良女子大学)
    • Organizer
      日本天文学会2015年秋季年会
    • Place of Presentation
      甲南大学
    • Year and Date
      2015-09-09
    • Related Report
      2015 Annual Research Report
  • [Presentation] かみのけ座銀河団の弱い重力レンズサブハロー周辺の温度構造2015

    • Author(s)
      佐々木亨, 松下恭子, 佐藤浩介 (東京理科大学), 岡部信広 (広島大学)
    • Organizer
      日本天文学会2015年秋季年会
    • Place of Presentation
      甲南大学
    • Year and Date
      2015-09-09
    • Related Report
      2015 Annual Research Report
  • [Presentation] Suzaku observations of cluster outskirts2015

    • Author(s)
      Kyoko Matsushita
    • Organizer
      Astroparticle View of Galaxy Clusters
    • Place of Presentation
      広島大学
    • Year and Date
      2015-03-24 – 2015-03-26
    • Related Report
      2014 Research-status Report
    • Invited
  • [Presentation] 「すざく」による NGC 1550 銀河群のビリアル半径付近までの鉄質量-銀河光度比とエントロピー分布2015

    • Author(s)
      佐々木亨, 松下恭子, 佐藤浩介, 阿部雄介, 横田佳奈 (東京理科大学)
    • Organizer
      日本天文学会2015年春季年会
    • Place of Presentation
      大阪大学
    • Year and Date
      2015-03-18
    • Related Report
      2014 Research-status Report
  • [Presentation] 「すざく」による大規模フィラメント上の銀河団 AWM 7 の鉄質量ー銀河光度比の方向依存性2015

    • Author(s)
      横田佳奈、松下恭子、佐藤浩介、佐久間絵理、佐々木亨、阿部雄介、栗山翼 (東京理科大学)、石 崎欣尚 (首都大学東京)、星野晶夫 (立教大学)
    • Organizer
      日本天文学会2015年春季年会
    • Place of Presentation
      大阪大学
    • Year and Date
      2015-03-18
    • Related Report
      2014 Research-status Report
  • [Presentation] 「すざく」衛星を用いた銀河団外縁部のアバンダンスの不定性の評価2015

    • Author(s)
      阿部雄介、松下恭子、佐藤浩介、佐々木亨(東京理科大学)
    • Organizer
      日本天文学会2015年春季年会
    • Place of Presentation
      大阪大学
    • Year and Date
      2015-03-18
    • Related Report
      2014 Research-status Report
  • [Presentation] 銀河団外縁部のエントロピー異常の原因の検証2014

    • Author(s)
      栗山翼, 佐藤浩介, 松下恭子 (東京理科大学), 赤松弘規 (SRON), 大橋隆哉 (首都大学東京), 藤田裕 (大阪大学), 川原田円, 田村隆幸 (ISAS/JAXA), 中澤知洋 (東京大学), 岡部信広 (IPMU), 太田直 美 (奈良女子大学), 滝沢元和 (山形大学)
    • Organizer
      日本天文学会2014年秋季年会
    • Place of Presentation
      山形大学
    • Year and Date
      2014-09-11
    • Related Report
      2014 Research-status Report
  • [Presentation] かみのけ座銀河団に見つかったサフハローの「すざく」による観測2014

    • Author(s)
      佐々木亨、松下恭子、佐藤浩介 (東京理科大学)、岡部信広 (東京大学/Kavli IPMU)
    • Organizer
      日本天文学会2014年秋季年会
    • Place of Presentation
      山形大学
    • Year and Date
      2014-09-11
    • Related Report
      2014 Research-status Report
  • [Presentation] 「すざく」衛星によって観測された渦巻銀河 M31 中心部の重元素組成比2014

    • Author(s)
      長谷川俊介, 松下恭子, 佐藤浩介 (東理大理), 小波さおり (首都大理工), 高橋弘充 (広島大理)
    • Organizer
      日本天文学会2014年秋季年会
    • Place of Presentation
      山形大学
    • Year and Date
      2014-09-11
    • Related Report
      2014 Research-status Report
  • [Presentation] 巨大銀河団のビリアル半径までのガス質量、鉄質量と銀河光度の比2014

    • Author(s)
      佐々木亨、松下恭子、佐藤浩介、阿部雄介、横田佳奈(東京理科大学)
    • Organizer
      日本天文学会2014年春季年会
    • Place of Presentation
      国際基督教大学
    • Related Report
      2013 Research-status Report
  • [Presentation] Suzaku observations of cluster outskirts2014

    • Author(s)
      Kyoko Matsushita
    • Organizer
      Suzaku-MAXI 2014 "Expanding the Frontiers of the X-ray Universe"
    • Place of Presentation
      愛媛大学
    • Related Report
      2013 Research-status Report
    • Invited
  • [Presentation] 「すざく」で観測されたAWM7銀河団外縁部の方向依存性と鉄の分布2013

    • Author(s)
      横田佳奈, 松下恭子, 佐藤浩介, 佐久間絵理(東理大), 石崎欣尚(首都大), 星野晶夫(立教大)
    • Organizer
      日本天文学会2013年秋季年会
    • Place of Presentation
      東北大学
    • Related Report
      2013 Research-status Report
  • [Presentation] 「すざく」衛星によって観測されたケンタウルス座銀河団の重元素分布と鉄質量-銀河光度比2013

    • Author(s)
      阿部雄介、松下恭子、佐藤浩介、佐々木亨(東京理科大学)
    • Organizer
      日本天文学会2013年秋季年会
    • Place of Presentation
      東北大学
    • Related Report
      2013 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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