A LUMINOUS PECULIAR TYPE IA SUPERNOVA SN 2011HR: MORE LIKE SN 1991T OR SN 2007if?

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	A LUMINOUS PECULIAR TYPE IA SUPERNOVA SN 2011HR: MORE LIKE SN 1991T OR SN 2007if?
	Zhang JJ(张居甲)1,2,3 ; Wang, Xiao-Feng 3; Sasdelli, Michele 4,5; Zhang, Tian-Meng 6; Liu, Zheng-Wei7 ; Mazzali, Paolo A.4,5; Meng XC(孟祥存)1,2 ; Maeda, Keiichi 8,9; Chen, Jun-Cheng 3; Huang, Fang 3
刊名	ASTROPHYSICAL JOURNAL
	2016-02-01
卷号	817 期号:2
关键词	galaxies: individual (NGC 2691) supernovae: general supernovae: individual (SN 2011hr, SN 1991T, SN 2007if)
ISSN号	0004-637X
产权排序	第一完成单位
英文摘要	Photometric and spectroscopic observations of a slowly declining, luminous Type Ia supernova (SN Ia) SN 2011hr in the starburst galaxy NGC 2691 are presented. SN. 2011hr is found to peak at MB = -19.84 +/- 0.40 mag, with a postmaximum decline rate Delta(m15)(B) = 0.92. +/- 0.03 mag. From the maximum-light bolometric luminosity, L = (2.30 +/- 0.90) x 10(43) erg s(-1), we estimate the mass of synthesized Ni-56 in SN 2011hr to be M(Ni-56) = 1.11 +/- 0.43M(circle dot). SN 2011hr appears more luminous than SN 1991T at around maximum light, and the absorption features from its intermediate-mass elements (IMEs) are noticeably weaker than those of the latter at similar phases. Spectral modeling suggests that SN 2011hr has IMEs of similar to 0.07 M-circle dot in the outer ejecta, which is much lower than the typical value of normal SNe Ia (i.e., 0.3-0.4 M-circle dot) and is also lower than the value of SN 1991T (i.e., similar to 0.18 M-circle dot). These results indicate that SN. 2011hr may arise from a Chandrasekhar-mass white dwarf progenitor that experienced a more efficient burning process in the explosion. Nevertheless, it is still possible that SN. 2011hr may serve as a transitional object connecting the SN 1991T-like SNe Ia with a superluminous subclass like SN 2007if given that the latter also shows very weak IMEs at all phases.
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]	GRAVITATIONALLY CONFINED DETONATION ; NEAR-INFRARED OBSERVATIONS ; HIGH-VELOCITY FEATURES ; HUBBLE-SPACE-TELESCOPE ; LIGHT CURVES ; ABUNDANCE STRATIFICATION ; WHITE-DWARF ; SPECTROSCOPIC OBSERVATIONS ; ULTRAVIOLET OBSERVATIONS ; EXPLOSION
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.3847/0004-637X/817/2/114/meta
语种	英语
WOS记录号	WOS:000369437900031
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/9337]
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.Yunnan Observatories (YNAO), Chinese Academy of Sciences, Kunming 650011, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China 3.Physics Department and Tsinghua Center for Astrophysics (THCA), Tsinghua University, Beijing 100084, China 4.Astrophysics Research Institute, Liverpool John Moores University, Liverpool Science Park, 146 Brownlow Hill, Liverpool L3 5RF, UK 5.Max-Planck Institute fur Astrophysics, D-85748 Garching, Germany 6.National Astronomical Observatories of China (NAOC), Chinese Academy of Sciences, Beijing 100012, China 7.Argelander-Institut für Astronomie, Auf dem Hügel 71, D-53121, Bonn, Germany 8.Department of Astronomy, Kyoto University, Kyoto, 606-8502, Japan 9.Kavli Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583, Japan 10.University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100049, China
推荐引用方式 GB/T 7714	Zhang JJ,Wang, Xiao-Feng,Sasdelli, Michele,et al. A LUMINOUS PECULIAR TYPE IA SUPERNOVA SN 2011HR: MORE LIKE SN 1991T OR SN 2007if?[J]. ASTROPHYSICAL JOURNAL,2016,817(2).
APA	Zhang JJ.,Wang, Xiao-Feng.,Sasdelli, Michele.,Zhang, Tian-Meng.,Liu, Zheng-Wei.,...&Yi WM.(2016).A LUMINOUS PECULIAR TYPE IA SUPERNOVA SN 2011HR: MORE LIKE SN 1991T OR SN 2007if?.ASTROPHYSICAL JOURNAL,817(2).
MLA	Zhang JJ,et al."A LUMINOUS PECULIAR TYPE IA SUPERNOVA SN 2011HR: MORE LIKE SN 1991T OR SN 2007if?".ASTROPHYSICAL JOURNAL 817.2(2016).