High-velocity Feature as the Indicator of the Stellar Population of Type Ia Supernovae | |
Meng XC(孟祥存)1,2,3 | |
刊名 | ASTROPHYSICAL JOURNAL |
2019-11-20 | |
卷号 | 886期号:1页码:16 |
关键词 | Type Ia supernovae White dwarf stars Circumstellar matter |
ISSN号 | 0004-637X |
DOI | 10.3847/1538-4357/ab4e10 |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | Although Type Ia supernovae (SNe Ia) are very useful in many astrophysical fields, their exact nature is still unclear, e.g., the progenitor and explosion models. The high-velocity features (HVFs) in optical spectra of SNe Ia could provide some meaningful information to constrain the nature of SNe Ia. Here, I show strong evidence that the SNe Ia with a strong Ca ii infrared triple (Ca ii IR3) HVF around maximum brightness are associated with a relatively younger population than those with a weak Ca ii IR3 HVF, e.g., the SNe Ia with a strong Ca ii IR3 HVF tend to occur in a late-type galaxy or in an early-type galaxy with significant star formation. In addition, using pixel statistics, I find that the SNe Ia with a strong maximum-light Ca ii IR3 HVF show a higher degree of association with the star formation index, e.g., H? or near-UV emission, than those with a weak Ca ii IR3 HVF. Moreover, I find that the strength of the Ca ii IR3 HVF is linearly dependent on the difference of the absorption-weighted velocities between the Ca ii IR3 and Si ii 635.5 nm absorption lines, which then is a good index for diagnosing whether there is a high-velocity component in the Ca ii IR3 absorption feature in the spectra of SNe Ia. I finally discuss the origin of the HVFs and the constraints from our discoveries on the progenitor model of SNe Ia. |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星物理学 |
URL标识 | 查看原文 |
出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
资助项目 | NSFC[11973080] ; NSFC[11733008] ; Yunnan Foundation[2015HB096] ; Yunnan Foundation[2017HC018] ; CAS[KJZD-EW-M06-01] ; Yunnan Ten Thousand Talents Plan-Young & Elite Talents Project |
WOS关键词 | CORE-DEGENERATE SCENARIO ; DELAYED-DETONATION MODELS ; WHITE-DWARFS ; CIRCUMSTELLAR MATERIAL ; PROGENITOR SYSTEM ; SODIUM-ABSORPTION ; COMMON-ENVELOPE ; STAR-FORMATION ; EXPLOSION ; EVOLUTION |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP PUBLISHING LTD |
WOS记录号 | WOS:000499369900001 |
资助机构 | NSFC[11973080, 11733008] ; Yunnan Foundation[2015HB096, 2017HC018] ; CAS[KJZD-EW-M06-01] ; Yunnan Ten Thousand Talents Plan-Young & Elite Talents Project |
内容类型 | 期刊论文 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/21576] |
专题 | 云南天文台_大样本恒星演化研究组 |
通讯作者 | Meng XC(孟祥存) |
作者单位 | 1.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650216 Kunming, People's Republic of China 2.Yunnan Observatories, Chinese Academy of Sciences, 650216 Kunming, People's Republic of China 3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, People's Republic of China |
推荐引用方式 GB/T 7714 | Meng XC. High-velocity Feature as the Indicator of the Stellar Population of Type Ia Supernovae[J]. ASTROPHYSICAL JOURNAL,2019,886(1):16. |
APA | Meng XC.(2019).High-velocity Feature as the Indicator of the Stellar Population of Type Ia Supernovae.ASTROPHYSICAL JOURNAL,886(1),16. |
MLA | Meng XC."High-velocity Feature as the Indicator of the Stellar Population of Type Ia Supernovae".ASTROPHYSICAL JOURNAL 886.1(2019):16. |
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