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Can the Helium-detonation Model Explain the Observed Diversity of Type Ia Supernovae?
Li, Wenxiong1,2; Wang, Xiaofeng1,3,4; Bulla, Mattia5; Pan, Yen-Chen6; Wang, Lifan7; Mo, Jun1; Zhang JJ(张居甲)8,9; Wu, Chengyuan1; Zhang, Jicheng1; Zhang, Tianmeng10,11; Xiang, Danfeng1; Lin, Han1; Sai, Hanna1; Zhang, Xinghan1; Chen, Zhihao1; Yan, Shengyu1
发表期刊ASTROPHYSICAL JOURNAL
2021
卷号906期号:2页码:12
DOI10.3847/1538-4357/abc9b5
产权排序第8完成单位
收录类别SCI
关键词Type Ia supernovae Observational astronomy Helium burning Optical observation
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.

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]
项目资助者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]
语种英语
学科领域天文学 ; 天体物理学 ; 实测天体物理学 ; 恒星与银河系 ; 恒星天文学
学科门类理学 ; 理学::天文学
文章类型Article
出版者IOP PUBLISHING LTD
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS记录号WOS:000607466100001
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]HIGH-VELOCITY FEATURES ; WHITE-DWARF MODELS ; MASS-METALLICITY RELATION ; SHELL ; EXPLOSION ; EVOLUTION ; PROGENITORS ; PARAMETER ; SPECTRA ; ORIGIN
引用统计
被引频次:16[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/24097
专题南方基地
中国科学院天体结构与演化重点实验室
通讯作者Li, Wenxiong
作者单位1.Physics Department and Tsinghua Center for Astrophysics (THCA), Tsinghua University, Beijing, 100084, People's Republic of China
2.The School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
3.Beijing Planetarium, Beijing Academy of Science and Technology, Beijing, 100089, People's Republic of China
4.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, 210023, People's Republic of China
5.Nordita, KTH Royal Institute of Technology and Stockholm University, Roslagstullsbacken 23, SE-106 91 Stockholm, Sweden
6.Graduate Institute of Astronomy, National Central University, 300 Jhongda Road, Zhongli, Taoyuan, 32001, Taiwan
7.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
8.Yunnan Observatories (YNAO), Chinese Academy of Sciences (CAS), Kunming, 650216, People's Republic of China
9.Key Laboratory for the Structure and Evolution of Celestial Objects,CAS, Kunming, 650216, People's Republic of China
10.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, 10101, Beijing, People's Republic of China
11.School of Astronomy and Space Science, University of Chinese Academy of Sciences, 101408, Beijing, People's Republic of China
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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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