OPTICAL OBSERVATIONS OF THE TYPE IA SUPERNOVA SN 2011fe IN M101 FOR NEARLY 500 DAYS

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	OPTICAL OBSERVATIONS OF THE TYPE IA SUPERNOVA SN 2011fe IN M101 FOR NEARLY 500 DAYS
	Zhang, Kaicheng 1; Wang, Xiaofeng 1; Zhang JJ(张居甲)2,3 ; Zhang, Tianmeng 4; Ganeshalingam, Mohan 5; Li, Weidong 5; Filippenko, Alexei V.5; Zhao, Xulin 1; Zheng, Weikang 5; Bai JM(白金明)2,3
刊名	ASTROPHYSICAL JOURNAL
	2016-03-20
卷号	820 期号:1
关键词	supernovae: general supernovae: individual (SN 2011fe)
ISSN号	0004-637X
通讯作者	Wang, XF
产权排序	第二完成单位
英文摘要	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.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	LIGHT CURVES ; RISE-TIME ; NEBULAR SPECTRA ; COMPANION STAR ; ULTRAVIOLET ; PROGENITOR ; TELESCOPE ; SPECTROSCOPY ; SYSTEM ; ENVIRONMENT
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.3847/0004-637X/820/1/67/meta
语种	英语
WOS记录号	WOS:000372787000066
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/9575]
专题	云南天文台_丽江天文观测站（南方基地）云南天文台_中国科学院天体结构与演化重点实验室
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
推荐引用方式 GB/T 7714	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.,...&Wu, Chao.(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).