Can the Helium-detonation Model Explain the Observed Diversity of Type Ia Supernovae? | |
Li, Wenxiong6,7; Wang, Xiaofeng5,7,8; Bulla, Mattia3; Pan, Yen-Chen2; Wang, Lifan1; Mo, Jun7; Zhang JJ(张居甲)10,11; Wu, Chengyuan7; Zhang, Jicheng7; Zhang, Tianmeng4,9 | |
刊名 | ASTROPHYSICAL JOURNAL |
2021 | |
卷号 | 906期号:2页码:12 |
关键词 | Type Ia supernovae Observational astronomy Helium burning Optical observation |
ISSN号 | 0004-637X |
DOI | 10.3847/1538-4357/abc9b5 |
产权排序 | 第8完成单位 |
文献子类 | Article |
英文摘要 | We study a sample of 16 Type Ia supernovae (SNe Ia) having both spectroscopic and photometric observations within 2-3 days after the first light. The early B - V colors of such a sample tend to show a continuous distribution. For objects with normal ejecta velocity (NV), the C ii lambda 6580 feature is always visible in the early spectra, while it is absent or very weak in the high-velocity (HV) counterpart. Moreover, the velocities of the detached high-velocity features (HVFs) of the Ca II near-IR triplet (CaIR3) above the photosphere are found to be much higher in HV objects than in NV objects, with typical values exceeding 30,000 km s(-1) at 2-3 days. We further analyze the relation between the velocity shift of late-time [Fe II] lines (v([Fe II])) and host galaxy mass. We find that all HV objects have redshifted v([Fe II]), while NV objects have both blue- and redshifted v([Fe II]). It is interesting to point out that the objects with redshifted v([Fe II]) are all located in massive galaxies, implying that HV and a portion of NV objects may have similar progenitor metallicities and explosion mechanisms. We propose that, with a geometric/projected effect, the He-detonation model may account for the similarity in birthplace environment and the differences seen in some SNe Ia, including B - V colors, C II features, CaIR3 HVFs at early times, and v([Fe II]) in the nebular phase. Nevertheless, some features predicted by He-detonation simulation, such as the rapidly decreasing light curve, deviate from the observations, and some NV objects with blueshifted nebular v([Fe II]) may involve other explosion mechanisms. |
学科主题 | 天文学 ; 天体物理学 ; 实测天体物理学 ; 恒星与银河系 ; 恒星天文学 |
URL标识 | 查看原文 |
出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
资助项目 | National Natural Science Foundation of China (NSFC)[11633002] ; National Natural Science Foundation of China (NSFC)[12033003] ; National Natural Science Foundation of China (NSFC)[11761141001] ; National Natural Science Foundation of China (NSFC)[11773067] ; National Natural Science Foundation of China (NSFC)[11403096] ; German Federal Ministry of Education and Research (BMBF) ; German State Ministries for Research of Baden-Wurttemberg (MWK) ; Bayern (StMWFK) ; Nordrhein-Westfalen (MIWF) ; Youth Innovation Promotion Association of the CAS[2018081] ; Ten Thousand Talents Program of Yunnan for Top-notch Young Talents ; NSF[AST-1817099] |
WOS关键词 | HIGH-VELOCITY FEATURES ; WHITE-DWARF MODELS ; MASS-METALLICITY RELATION ; SHELL ; EXPLOSION ; EVOLUTION ; PROGENITORS ; PARAMETER ; SPECTRA ; ORIGIN |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP PUBLISHING LTD |
WOS记录号 | WOS:000607466100001 |
资助机构 | National Natural Science Foundation of China (NSFC)[11633002, 12033003, 11761141001, 11773067, 11403096] ; German Federal Ministry of Education and Research (BMBF) ; German State Ministries for Research of Baden-Wurttemberg (MWK) ; Bayern (StMWFK) ; Nordrhein-Westfalen (MIWF) ; Youth Innovation Promotion Association of the CAS[2018081] ; Ten Thousand Talents Program of Yunnan for Top-notch Young Talents ; NSF[AST-1817099] |
内容类型 | 期刊论文 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/24096] |
专题 | 云南天文台_丽江天文观测站(南方基地) |
通讯作者 | Li, Wenxiong |
作者单位 | 1.George P. and Cynthia Woods Mitchell Institute for Fundamental Physics & Astronomy, Texas A&M University, Department of Physics and Astronomy, 4242 TAMU, College Station, TX 77843, USA 2.Graduate Institute of Astronomy, National Central University, 300 Jhongda Road, Zhongli, Taoyuan, 32001, Taiwan 3.Nordita, KTH Royal Institute of Technology and Stockholm University, Roslagstullsbacken 23, SE-106 91 Stockholm, Sweden 4.School of Astronomy and Space Science, University of Chinese Academy of Sciences, 101408, Beijing, People's Republic of China 5.Beijing Planetarium, Beijing Academy of Science and Technology, Beijing, 100089, People's Republic of China 6.The School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel 7.Physics Department and Tsinghua Center for Astrophysics (THCA), Tsinghua University, Beijing, 100084, People's Republic of China 8.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, 210023, People's Republic of China 9.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, 10101, Beijing, People's Republic of China 10.Key Laboratory for the Structure and Evolution of Celestial Objects,CAS, Kunming, 650216, People's Republic of China |
推荐引用方式 GB/T 7714 | Li, Wenxiong,Wang, Xiaofeng,Bulla, Mattia,et al. Can the Helium-detonation Model Explain the Observed Diversity of Type Ia Supernovae?[J]. ASTROPHYSICAL JOURNAL,2021,906(2):12. |
APA | Li, Wenxiong.,Wang, Xiaofeng.,Bulla, Mattia.,Pan, Yen-Chen.,Wang, Lifan.,...&Yan, Shengyu.(2021).Can the Helium-detonation Model Explain the Observed Diversity of Type Ia Supernovae?.ASTROPHYSICAL JOURNAL,906(2),12. |
MLA | Li, Wenxiong,et al."Can the Helium-detonation Model Explain the Observed Diversity of Type Ia Supernovae?".ASTROPHYSICAL JOURNAL 906.2(2021):12. |
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