OPTICAL AND ULTRAVIOLET OBSERVATIONS OF A LOW-VELOCITY TYPE II PLATEAU SUPERNOVA 2013am IN M65

	OPTICAL AND ULTRAVIOLET OBSERVATIONS OF A LOW-VELOCITY TYPE II PLATEAU SUPERNOVA 2013am IN M65
	Zhang, Jujia 1,2,3; Wang, Xiaofeng 4,5; Mazzali, Paolo A.6; Bai, Jinming 1,3; Zhang, Tianmeng7,8 ; Bersier, David 6; Huang, Fang 4,5,9; Fan, Yufeng 1,2,3; Mo, Jun 4,5; Wang, Jianguo 1,3,10
刊名	ASTROPHYSICAL JOURNAL
	2014-12-10
卷号	797 期号:1
关键词	supernovae: general supernovae: individual (SN 2013am)
英文摘要	Optical and ultraviolet observations for the nearby type II plateau supernova (SN IIP) 2013am in the nearby spiral galaxy M65 are presented in this paper. The early spectra are characterized by relatively narrow P-Cygni features, with ejecta velocities much lower than observed in normal SNe IIP (i.e., similar to 2000 km s(-1) versus similar to 5000 km(-1) in the middle of the plateau phase). Moreover, prominent Ca ii absorptions are also detected in SN 2013am at relatively early phases. These spectral features are reminiscent of those seen in the low-velocity and low-luminosity SN IIP 2005cs. However, SN 2013am exhibits different photometric properties, having shorter plateau phases and brighter light curve tails if compared to SN 2005cs. Adopting R-V = 3.1 and a mean value of total reddening derived from the photometric and spectroscopic methods (i.e., E(B - V) = 0.55 +/- 0.19 mag), we find that SN 2013am may have reached an absolute V-band peak magnitude of -15.83 +/- 0.71 mag and produced an Ni-56 mass of 0.016(0.006)(+0.010) M-circle dot in the explosion. These parameters are close to those derived for SN 2008in and SN 2009N, which have been regarded as "gap-filler" objects linking the faint SNe IIP to the normal ones. This indicates that some low-velocity SNe IIP may not necessarily result from the low-energetic explosions. The low expansion velocities could be due to a lower metallicity of the progenitor stars, a larger envelope mass ejected in the explosion, or the effect of viewing angle where these SNe were observed at an angle away from the polar direction.
收录类别	SCI
语种	英语
WOS记录号	WOS:000345915000005
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/6361]
专题	国家天文台_光学天文研究部
作者单位	1.Chinese Acad Sci, Yunnan Observ YNAO, Kunming 650216, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650216, Peoples R China 4.Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China 5.Tsinghua Univ, Tsinghua Ctr Astrophys THCA, Beijing 100084, Peoples R China 6.Liverpool John Moores Univ, Astrophys Res Inst, Liverpool L3 5RF, Merseyside, England 7.Chinese Acad Sci, NAOC, Beijing 100012, Peoples R China 8.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 9.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China 10.Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Hefei 230026, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Jujia,Wang, Xiaofeng,Mazzali, Paolo A.,et al. OPTICAL AND ULTRAVIOLET OBSERVATIONS OF A LOW-VELOCITY TYPE II PLATEAU SUPERNOVA 2013am IN M65[J]. ASTROPHYSICAL JOURNAL,2014,797(1).
APA	Zhang, Jujia.,Wang, Xiaofeng.,Mazzali, Paolo A..,Bai, Jinming.,Zhang, Tianmeng.,...&Walker, Emma S..(2014).OPTICAL AND ULTRAVIOLET OBSERVATIONS OF A LOW-VELOCITY TYPE II PLATEAU SUPERNOVA 2013am IN M65.ASTROPHYSICAL JOURNAL,797(1).
MLA	Zhang, Jujia,et al."OPTICAL AND ULTRAVIOLET OBSERVATIONS OF A LOW-VELOCITY TYPE II PLATEAU SUPERNOVA 2013am IN M65".ASTROPHYSICAL JOURNAL 797.1(2014).