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SN 2014J in M82: new insights on the spectral diversity of Type Ia supernovae
Zhang, Kaicheng1,2; Wang, Xiaofeng1; Zhang JJ(张居甲)3,4,5; Zhang, Tianmeng6,7; Benetti, S.8; Elias-Rosa, N.8; Huang, Fang9; Lin, Han1; Li, Linyi1; Li, Wenxiong1; Ochner, P.8,10; Pastorello, A.8; Rui, Liming1; Tartaglia, L.11; Tomasella, L.8; Siviero, A.10; Munari, U.8; Terreran, G.12; Song, Hao1; Taubenberger, S.13,14; Wheeler, J. Craig2; Xiang, Danfeng1; Zhao, Xulin15; Li, Hongbin6; Bai JM(白金明)3,4,5; Jiang, Xiaojun6; Shi, Jianrong6; Wu, Zhenyu6,7
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2018-11-01
卷号481期号:1页码:878-893
DOI10.1093/mnras/sty2289
产权排序第3完成单位
收录类别SCI
关键词supernovae: general supernovae: individual (SN 2014J)
摘要

We present extensive spectroscopic observations for one of the closest Type Ia supernovae (SNe Ia), SN 2014J discovered in M82, ranging from 10.4 d before to 473.2 d after B-band maximum light. The diffuse interstellar band features detected in a high-resolution spectrum allow an estimate of line-of-sight extinction as A(v) similar to 1.9 +/- 0.6 mag. Spectroscopically, SN 2014J can be put into the high-velocity (HV) subgroup in Wang's classification with a velocity of Si II lambda 6355 at maximum light of upsilon(0) = 1.22 +/- 0.01 x 10(4) km s(-1) but has a low velocity gradient (LVG, following Benetti's classification) of (v) over bar = 41 +/- 2 km s(-1) d(-1), which is inconsistent with the trend that HV SNe Ia generally have larger velocity gradients. We find that the HV SNe Ia with LVGs tend to have relatively stronger Si III (at similar to 4400 angstrom) absorptions in early spectra, larger ratios of S II lambda 5468 to S II lambda 5640, and weaker Si II 5972 absorptions compared to their counterparts with similar velocities but high velocity gradients. This shows that the HV+ LVG subgroup of SNe Ia may have intrinsically higher photospheric temperature, which indicates that their progenitors may experience more complete burning in the explosions relative to the typical HV SNe Ia.

资助项目Chinese Academy of Sciences ; People's Government of Yunnan Province ; Major State Basic Research Development Program[2013CB834903] ; National Natural Science Foundation of China (NSFC)[11178003] ; National Natural Science Foundation of China (NSFC)[11325313] ; National Natural Science Foundation of China (NSFC)[11633002] ; National Program on Key Research and Development Project[2016YFA0400803] ; China Scholarship Council (CSC)[201706210140] ; NSFC[11203034] ; NSFC[11403096] ; NSFC[11773067] ; Open Project Program of the Key Laboratory of Optical Astronomy ; National Astronomical Observatories ; Youth Innovation Promotion Association of the CAS[2018081] ; Western Light Youth Project ; Key Research Program of the CAS[KJZD-EW-M06] ; PRININAF 2014 ; German Research Foundation[TRR 33]
项目资助者Chinese Academy of Sciences ; People's Government of Yunnan Province ; Major State Basic Research Development Program[2013CB834903] ; National Natural Science Foundation of China (NSFC)[11178003, 11325313, 11633002] ; National Program on Key Research and Development Project[2016YFA0400803] ; China Scholarship Council (CSC)[201706210140] ; NSFC[11203034, 11403096, 11773067] ; Open Project Program of the Key Laboratory of Optical Astronomy ; National Astronomical Observatories ; Youth Innovation Promotion Association of the CAS[2018081] ; Western Light Youth Project ; Key Research Program of the CAS[KJZD-EW-M06] ; PRININAF 2014 ; German Research Foundation[TRR 33]
语种英语
学科领域天文学 ; 天体物理学 ; 恒星与银河系
学科门类理学 ; 理学::天文学
文章类型Article
出版者OXFORD UNIV PRESS
出版地GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0035-8711
URL查看原文
WOS记录号WOS:000449651400061
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]LIGHT CURVES ; EXPLOSION ; ULTRAVIOLET ; MODELS ; SPECTROSCOPY ; EXTINCTION ; LUMINOSITY ; DISTANCES ; BANDS ; DUST
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/18418
专题丽江天文观测站(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Zhang, Kaicheng
作者单位1.Physics Department and Tsinghua Center for Astrophysics (THCA), Tsinghua University, Beijing 100084, China
2.Department of Astronomy, University of Texas at Austin, Austin, TX 78712-1205, USA
3.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China
4.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China
5.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China
6.Key Laboratory of Optical Astronomy,National Astronomical Observatory of China, Chinese Academy of Sciences, Beijing 100012, China
7.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 101408, China
8.INAF - Osservatorio Astronomico di Padova, vicolo dell’Osservatorio 5, I-35122 Padova, Italy
9.Shanghai Jiao Tong University, Shanghai, 200240, China
10.Dipartimento di Fisica e Astronomia, Universit`a di Padova, via Marzolo 8, I-35131 Padova, Italy
11.Department of Astronomy and The Oskar Klein Centre, AlbaNova University Center, Stockholm University, SE-106 91 Stockholm, Sweden
12.Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA) and Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208, USA
13.European Southern Observatory, Karl-Schwarzschild-Str 2, D-85748 Garching, Germany
14.Max-Planck-Institut f¨ur Astrophysik, Karl-Schwarzschild-Str 1, D-85748 Garching, Germany
15.School of Science, Tianjin University of Technology, Tianjin 300384, China
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GB/T 7714
Zhang, Kaicheng,Wang, Xiaofeng,Zhang JJ,et al. SN 2014J in M82: new insights on the spectral diversity of Type Ia supernovae[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,481(1):878-893.
APA Zhang, Kaicheng.,Wang, Xiaofeng.,Zhang JJ.,Zhang, Tianmeng.,Benetti, S..,...&Wu, Zhenyu.(2018).SN 2014J in M82: new insights on the spectral diversity of Type Ia supernovae.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,481(1),878-893.
MLA Zhang, Kaicheng,et al."SN 2014J in M82: new insights on the spectral diversity of Type Ia supernovae".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 481.1(2018):878-893.
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