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THE OXYGEN FEATURES IN TYPE Ia SUPERNOVAE AND IMPLICATIONS FOR THE NATURE OF THERMONUCLEAR EXPLOSIONS
Zhao, Xulin1,2,3; Maeda, Keiichi2,4; Wang, Xiaofeng1; Wang, Lifan5; Sai, Hanna1; Zhang JJ(张居甲)6,7; Zhang, Tianmeng8; Huang, Fang1; Rui, Liming1
Source PublicationASTROPHYSICAL JOURNAL
2016-08-01
Volume826Issue:2
DOI10.3847/0004-637X/826/2/211
Contribution Rank第6完成单位
Indexed BySCI
KeywordMethods: Data Analysis Supernovae: General Techniques: Spectroscopic
Abstract

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.

Funding ProjectMajor State Basic Research Development Program[2013CB834903] ; National Natural Science Foundation of China (NSFC)[11178003] ; National Natural Science Foundation of China (NSFC)[11325313] ; China Scholarship Council[CSC 201406210312] ; JSPS[26800100] ; World Premier International Research Center Initiative [WPI Initiative], MEXT, Japan ; Key Research Program of the CAS[KJZD-EW-M06] ; Western Light Youth Project of CAS ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; US National Science Foundation[AST 0907903] ; US National Science Foundation
Funding OrganizationMajor State Basic Research Development Program[2013CB834903] ; National Natural Science Foundation of China (NSFC)[11178003, 11325313] ; China Scholarship Council[CSC 201406210312] ; JSPS[26800100] ; World Premier International Research Center Initiative [WPI Initiative], MEXT, Japan ; Key Research Program of the CAS[KJZD-EW-M06] ; Western Light Youth Project of CAS ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; US National Science Foundation[AST 0907903] ; US National Science Foundation
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS IDWOS:000381977900111
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordHIGH-VELOCITY FEATURES ; DELAYED-DETONATION MODEL ; PHOTOMETRY DATA RELEASE ; WHITE-DWARF MODELS ; LIGHT CURVES ; SN 2011FE ; CIRCUMSTELLAR MATERIAL ; SPECTROSCOPIC DIVERSITY ; OPTICAL OBSERVATIONS ; EARLY ULTRAVIOLET
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9719
Collection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
Corresponding AuthorZhao, Xulin
Affiliation1.Physics Department and Tsinghua Center for Astrophysics, Tsinghua University, Beijing, 100084, China
2.Department of Astronomy, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
3.School of Science, Tianjin University of Technology, Tianjin, 300384, China
4.Kavli Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583, Japan
5.Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, TX 77843, USA
6.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650216, China
7.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China
8.National Astronomical Observatory of China, Chinese Academy of Sciences, Beijing, 100012, China
Recommended Citation
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).
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