X-ray study of metal distribution in the hot gas and stellar initial mass function
| Project/Area Number |
25400235
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Astronomy
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| Research Institution | Tokyo University of Science |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
SATO Kosuke 東京理科大学, 理学部第一部, 助教 (50453840)
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| Research Collaborator |
SASAKI Toru
ICHIKAWA Kazuya
KONAMI Saori
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| 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)
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| Keywords | X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 |
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| 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.
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Report
(4 results)
Research Products
(26 results)
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[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
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Journal Title
Monthly Notices of the Royal Astronomical Society
Volume: 456
Issue: 4
Pages: 4475-4487
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[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
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Journal Title
Publications of the Astronomical Society of Japan
Volume: 66
Issue: 5
Pages: 99-99
DOI
Related Report
Peer Reviewed / Open Access
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[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
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