THE OXYGEN FEATURES IN TYPE Ia SUPERNOVAE AND IMPLICATIONS FOR THE NATURE OF THERMONUCLEAR EXPLOSIONS
文献类型：期刊论文
| 作者 | Zhao, Xulin1,2,3,4; Maeda, Keiichi3,5; Wang, Xiaofeng1,2; Wang, Lifan6; Sai, Hanna1,2; Zhang, Jujia7,8; Zhang, Tianmeng9 ; Huang, Fang1,2; Rui, Liming1,2
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2016-08-01 |
| 卷号 | 826期号:2 |
| 关键词 | methods: data analysis supernovae: general techniques: spectroscopic |
| 英文摘要 | The absorption feature OI lambda 7773 is an important spectral indicator for type Ia supernovae (SNe Ia) that can be used to trace the unburned material in outer layers of the exploding white dwarf (WD). In this work, we use a large sample of SNe Ia to examine this absorption at early phases (i.e., -13 day less than or similar to t less than or similar to -7 day) and make comparisons with the absorption features of Si II lambda 6355 and the Ca II near-infrared triplet. We show that for a subgroup of spectroscopically normal SNe with normal photospheric velocities (i.e., v(si) less than or similar to 12,500 km s(-1) at optical maximum), the line strength of the high velocity feature (HVF) of O I is inversely correlated with that of Si II (or Ca II), and this feature also shows a negative correlation with the luminosity of SNe Ia. This finding, together with other features we find for the O I HVF, reveal that for this subgroup of SNe Ia, explosive oxygen burning occurs in the outermost layer of the SN. Differences in the oxygen burning could lead to the observed diversity, which is in remarkable agreement with the popular delayed-detonation model of Chandrasekhar mass WDs. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | HIGH-VELOCITY FEATURES ; DELAYED-DETONATION MODEL ; PHOTOMETRY DATA RELEASE ; WHITE-DWARF MODELS ; LIGHT CURVES ; SN 2011FE ; CIRCUMSTELLAR MATERIAL ; SPECTROSCOPIC DIVERSITY ; OPTICAL OBSERVATIONS ; EARLY ULTRAVIOLET |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000381977900111 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6799]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China 2.Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing 100084, Peoples R China 3.Kyoto Univ, Dept Astron, Sakyo Ku, Kitashirakawa Oiwake Cho, Kyoto 6068502, Japan 4.Tianjin Univ Technol, Sch Sci, Tianjin 300384, Peoples R China 5.Univ Tokyo, Kavli Inst Phys & Math Universe WPI, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778583, Japan 6.Texas A&M Univ, Mitchell Inst Fundamental Phys & Astron, College Stn, TX 77843 USA 7.Chinese Acad Sci, Yunnan Observ, Kunming 650216, Peoples R China 8.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650216, Peoples R China 9.Chinese Acad Sci, Natl Astron Observ China, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Xulin,Maeda, Keiichi,Wang, Xiaofeng,et al. THE OXYGEN FEATURES IN TYPE Ia SUPERNOVAE AND IMPLICATIONS FOR THE NATURE OF THERMONUCLEAR EXPLOSIONS[J]. ASTROPHYSICAL JOURNAL,2016,826(2). |
| APA | Zhao, Xulin.,Maeda, Keiichi.,Wang, Xiaofeng.,Wang, Lifan.,Sai, Hanna.,...&Rui, Liming.(2016).THE OXYGEN FEATURES IN TYPE Ia SUPERNOVAE AND IMPLICATIONS FOR THE NATURE OF THERMONUCLEAR EXPLOSIONS.ASTROPHYSICAL JOURNAL,826(2). |
| MLA | Zhao, Xulin,et al."THE OXYGEN FEATURES IN TYPE Ia SUPERNOVAE AND IMPLICATIONS FOR THE NATURE OF THERMONUCLEAR EXPLOSIONS".ASTROPHYSICAL JOURNAL 826.2(2016). |
入库方式： OAI收割
来源：国家天文台
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