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Evidence for Two Distinct Populations of Type Ia Supernovae
Wang, Xiaofeng1,2; Wang, Lifan2,3; Filippenko, Alexei V.4; Zhang, Tianmeng5; Zhao, Xulin1
2013-04-12
Source PublicationSCIENCE
ISSN0036-8075
Volume340Issue:6129Pages:170-173
Corresponding AuthorWang, XF (reprint author), Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China. Email: wang_xf@mail.tsinghua.edu.cn
AbstractType Ia supernovae (SNe Ia) have been used as excellent standardizable candles for measuring cosmic expansion, but their progenitors are still elusive. Here, we report that the spectral diversity of SNe Ia is tied to their birthplace environments. We found that those with high-velocity ejecta are substantially more concentrated in the inner and brighter regions of their host galaxies than are normal-velocity SNe Ia. Furthermore, the former tend to inhabit larger and more luminous hosts. These results suggest that high-velocity SNe Ia likely originate from relatively younger and more metal-rich progenitors than do normal-velocity SNe Ia and are restricted to galaxies with substantial chemical evolution.
Subject AreaScience & Technology - Other Topics
WOS HeadingsScience & Technology
DOI10.1126/science.1231502
WOS KeywordWHITE-DWARF MODELS ; SN 2011FE ; CIRCUMSTELLAR MATERIAL ; ELLIPTIC GALAXIES ; SODIUM-ABSORPTION ; RED GIANT ; STARS ; EVOLUTION ; PROGENITORS ; DIVERSITY
Indexed BySCI
Language英语
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000317341400048
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/9911
Collection南极天文中心
Affiliation1.Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China
2.Texas A&M Univ, Mitchell Inst Fundamental Phys & Astron, College Stn, TX 77843 USA
3.Purple Mt Observ, Nanjing 201008, Jiangsu, Peoples R China
4.Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA
5.Chinese Acad Sci, Natl Astron Observ China, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Wang, Xiaofeng,Wang, Lifan,Filippenko, Alexei V.,et al. Evidence for Two Distinct Populations of Type Ia Supernovae[J]. SCIENCE,2013,340(6129):170-173.
APA Wang, Xiaofeng,Wang, Lifan,Filippenko, Alexei V.,Zhang, Tianmeng,&Zhao, Xulin.(2013).Evidence for Two Distinct Populations of Type Ia Supernovae.SCIENCE,340(6129),170-173.
MLA Wang, Xiaofeng,et al."Evidence for Two Distinct Populations of Type Ia Supernovae".SCIENCE 340.6129(2013):170-173.
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