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OPTICAL OBSERVATIONS OF THE TYPE IA SUPERNOVA SN 2011fe IN M101 FOR NEARLY 500 DAYS
Zhang, Kaicheng1; Wang, Xiaofeng1; Zhang JJ(张居甲)2,3; Zhang, Tianmeng4; Ganeshalingam, Mohan5; Li, Weidong5; Filippenko, Alexei V.5; Zhao, Xulin1; Zheng, Weikang5; Bai JM(白金明)2,3; Chen, Jia1; Chen, Juncheng1; Huang, Fang1,6; Mo, Jun1; Rui, Liming1; Song, Hao1; Sai, Hanna1; Li, Wenxiong1; Wang, Lifan7; Wu, Chao4; Wang, XF
发表期刊ASTROPHYSICAL JOURNAL
2016-03-20
卷号820期号:1
DOI10.3847/0004-637X/820/1/67
产权排序第2完成单位
收录类别SCI
关键词Supernovae: General Supernovae: Individual (Sn 2011fe)
摘要We present well-sampled optical observations of the bright Type Ia supernova (SN Ia) SN 2011fe in M101. Our data, starting from similar to 16 days before maximum light and extending to similar to 463 days after maximum, provide an unprecedented time series of spectra and photometry for a normal SN Ia. Fitting the early-time rising light curve, we find that the luminosity evolution of SN 2011fe follows a t(n) law, with the index n being close to 2.0 in the VRI bands but slightly larger in the U and B bands. Combining the published ultraviolet (UV) and near-infrared (NIR) photometry, we derive the contribution of UV/NIR emission relative to the optical. SN 2011fe is found to have stronger UV emission and reaches its UV peak a few days earlier than other SNe Ia with similar Delta m(15)(B), suggestive of less trapping of high-energy photons in the ejecta. Moreover, the U-band light curve shows a notably faster decline at late phases (t approximate to 100-300 days), which also suggests that the ejecta may be relatively transparent to UV photons. These results favor the notion that SN 2011fe might have a progenitor system with relatively lower metallicity. On the other hand, the early-phase spectra exhibit prominent high-velocity features (HVFs) of O I lambda 7773 and the Ca II NIR triplet, but only barely detectable in Si II 6355. This difference can be caused by either an ionization/temperature effect or an abundance enhancement scenario for the formation of HVFs; it suggests that the photospheric temperature of SN 2011fe is intrinsically low, perhaps owing to incomplete burning during the explosion of the white dwarf.
项目资助者National Science Foundation of China (NSFC)(11178003, 11325313, 11403096, 11203034) ; Major State Basic Research Development Program(2013CB834903) ; Key Research Program of the Chinese Academy of Sciences(KJZD-EW-M06) ; Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; NSF(AST-1211916) ; TABASGO Foundation ; People's Government of Yunnan Province ; Chinese Academy of Sciences ; Christopher R. Redlich Fund
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
URL查看原文
WOS记录号WOS:000372787000066
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]LIGHT CURVES ; RISE-TIME ; NEBULAR SPECTRA ; COMPANION STAR ; ULTRAVIOLET ; PROGENITOR ; TELESCOPE ; SPECTROSCOPY ; SYSTEM ; ENVIRONMENT
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被引频次:9[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/114a53/9575
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Wang, XF
作者单位1.Physics Department and Tsinghua Center for Astrophysics (THCA), Tsinghua University, Beijing, 100084, China
2.Yunnan Astronomical Observatory of China, Chinese Academy of Sciences, Kunming, 650011, China
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
4.National Astronomical Observatory of China, Chinese Academy of Sciences, Beijing, 100012, China
5.Department of Astronomy, University of California, Berkeley, CA 94720-3411, USA
6.Astronomy Department, Beijing Normal University, Beijing, 100875, China
7.Physics and Astronomy Department, Texas A&M University, College Station, TX 77843, USA
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Zhang, Kaicheng,Wang, Xiaofeng,Zhang JJ,et al. OPTICAL OBSERVATIONS OF THE TYPE IA SUPERNOVA SN 2011fe IN M101 FOR NEARLY 500 DAYS[J]. ASTROPHYSICAL JOURNAL,2016,820(1).
APA Zhang, Kaicheng.,Wang, Xiaofeng.,Zhang JJ.,Zhang, Tianmeng.,Ganeshalingam, Mohan.,...&Wang, XF.(2016).OPTICAL OBSERVATIONS OF THE TYPE IA SUPERNOVA SN 2011fe IN M101 FOR NEARLY 500 DAYS.ASTROPHYSICAL JOURNAL,820(1).
MLA Zhang, Kaicheng,et al."OPTICAL OBSERVATIONS OF THE TYPE IA SUPERNOVA SN 2011fe IN M101 FOR NEARLY 500 DAYS".ASTROPHYSICAL JOURNAL 820.1(2016).
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