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题名: Formation of new stellar populations from gas accreted by massive young star clusters
作者: Li, Chengyuan1, 2, 3, 4; de Grijs, Richard1, 2, 5; Deng, Licai3; Geller, Aaron M.6, 7, 8; Xin, Yu3; Hu, Yi3; Faucher-Giguere, Claude-Andre6, 7
刊名: NATURE
出版日期: 2016-01-28
卷号: 529, 期号:7587, 页码:502-+
DOI: 10.1038/nature16493
文章类型: Article
英文摘要: Stars in clusters are thought to form in a single burst from a common progenitor cloud of molecular gas. However, massive, old 'globular' clusters-those with ages greater than ten billion years and masses several hundred thousand times that of the Sun-often harbour multiple stellar populations(1-4), indicating that more than one star-forming event occurred during their lifetimes. Colliding stellar winds from late-stage, asymptotic-giant-branch stars(5-7) are often suggested to be triggers of second-generation star formation. For this to occur(8), the initial cluster masses need to be greater than a few million solar masses. Here we report observations of three massive relatively young star clusters (1-2 billion years old) in the Magellanic Clouds that show clear evidence of burst-like star formation that occurred a few hundred million years after their initial formation era. We show that such clusters could have accreted sufficient gas to form new stars if they had orbited in their host galaxies' gaseous disks throughout the period between their initial formation and the more recent bursts of star formation. This process may eventually give rise to the ubiquitous multiple stellar populations in globular clusters.
WOS标题词: Science & Technology
类目[WOS]: Multidisciplinary Sciences
研究领域[WOS]: Science & Technology - Other Topics
关键词[WOS]: SMALL-MAGELLANIC-CLOUD ; MAIN-SEQUENCE TURNOFFS ; SUB-GIANT BRANCH ; GLOBULAR-CLUSTERS ; MULTIPLE POPULATIONS ; MILKY-WAY ; EVOLUTION ; GALAXIES ; ENRICHMENT ; ORIGIN
收录类别: SCI
项目资助者: National Natural Science Foundation of China(11073001 ; Chinese Academy of Sciences(XDB09000000) ; 973 Program(2014CBB45700) ; National Science Foundation Astronomy and Astrophysics Postdoctoral Fellowship(AST-1302765) ; National Science Foundation(AST-1412836) ; 11373010 ; 11473037)
语种: 英语
WOS记录号: WOS:000368673800031
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16115
Appears in Collections:熊大闰_期刊论文

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作者单位: 1.Peking Univ, Kavli Inst Astron & Astrophys, Yi He Yuan Lu 5, Beijing 100871, Peoples R China
2.Peking Univ, Dept Astron, Yi He Yuan Lu 5, Beijing 100871, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, 20A Datun Rd, Beijing 100012, Peoples R China
4.Chinese Acad Sci, Purple Mt Observ, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
5.Int Space Sci Inst Beijing, 1 Nanertiao, Beijing 100190, Peoples R China
6.Northwestern Univ, CIERA, 2145 Sheridan Rd, Evanston, IL 60208 USA
7.Northwestern Univ, Dept Phys & Astron, 2145 Sheridan Rd, Evanston, IL 60208 USA
8.Univ Chicago, Dept Astron & Astrophys, 5640 S Ellis Ave, Chicago, IL 60637 USA
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