Average Spectral Properties of Type Ia Supernova Host Galaxies
文献类型：期刊论文
| 作者 | Uddin, Syed A.1,2; Mould, Jeremy2,3; Wang, Lifan1,4
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2017-12-01 |
| 卷号 | 850期号:2页码:6 |
| 关键词 | galaxies: general supernovae: general techniques: spectroscopic |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/aa93e9 |
| 通讯作者 | Uddin, Syed A.(saushuvo@gmail.com) |
| 英文摘要 | We construct the average spectra of host galaxies of slower, faster, bluer, and redder Type Ia supernovae (SNe Ia) from the SDSS-II supernova survey. The average spectrum of slower declining (broader light curve width or higher stretch) SN Ia hosts shows stronger emission lines compared to the average spectrum of faster declining (narrower light curve width or lower stretch) SN Ia hosts. Using pPXF, we find that hosts of slower declining SNe Ia have metallicities that are, on average, 0.24 dex lower than average metallicities of faster declining SN Ia hosts. Similarly, redder SN Ia hosts have slightly higher metallicities than bluer SN Ia hosts. Lick index analysis of metallic lines and Balmer lines shows that faster declining SN Ia hosts have relatively higher metal content and have relatively older stellar populations compared with slower declining SN Ia hosts. We calculate average Ha star formation rate (SFR), stellar mass, and the specific SFR (sSFR) of host galaxies in these subgroups of SNe Ia. We find that slower declining SN Ia hosts have significantly higher (> 5 sigma) sSFR than faster declining SN Ia hosts. A Kolmogorov-Smirnov test shows that these two types of hosts originate from different parent distributions. Our results, when compared with the models of Childress et al., indicate that slower declining SNe Ia, being hosted in actively star-forming galaxies, are young (prompt) SNe Ia, originating from similar progenitor age groups. |
| WOS关键词 | COSMOLOGICAL PARAMETERS ; ACCELERATING UNIVERSE ; DARK ENERGY ; AGES |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000425471400004 |
| 出版者 | IOP PUBLISHING LTD |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/22322]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Uddin, Syed A. |
| 作者单位 | 1.Chinese Acad Sci, Purple Mt Observ, Nanjing, Jiangsu, Peoples R China 2.ARC, Ctr Excellence All Sky Astrophys CAASTRO, Canberra, ACT, Australia 3.Swinburne Univ Technol, Ctr Astrophys & Supercomp, Melbourne, Vic, Australia 4.Texas A&M Univ, Dept Phys & Astron, College Stn, TX USA |
| 推荐引用方式 GB/T 7714 | Uddin, Syed A.,Mould, Jeremy,Wang, Lifan. Average Spectral Properties of Type Ia Supernova Host Galaxies[J]. ASTROPHYSICAL JOURNAL,2017,850(2):6. |
| APA | Uddin, Syed A.,Mould, Jeremy,&Wang, Lifan.(2017).Average Spectral Properties of Type Ia Supernova Host Galaxies.ASTROPHYSICAL JOURNAL,850(2),6. |
| MLA | Uddin, Syed A.,et al."Average Spectral Properties of Type Ia Supernova Host Galaxies".ASTROPHYSICAL JOURNAL 850.2(2017):6. |
入库方式： OAI收割
来源：紫金山天文台
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