SN 2017gmr: An Energetic Type II-P Supernova with Asymmetries

doi:10.3847/1538-4357/ab43e3

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	SN 2017gmr: An Energetic Type II-P Supernova with Asymmetries
	Andrews,Jennifer E.1; Sand,D. J.1; Valenti,S.2; Smith,Nathan 1; Dastidar,Raya 3,4; Sahu,D. K.5; Misra,Kuntal 2,3; Singh,Avinash 5,6; Hiramatsu,D.7,8; Brown,P. J.9
刊名	The Astrophysical Journal
	2019-10-29
卷号	885 期号:1
关键词	Type II supernovae Core-collapse supernovae Massive stars
ISSN号	0004-637X
DOI	10.3847/1538-4357/ab43e3
英文摘要	Abstract We present high-cadence UV, optical, and near-infrared data on the luminous Type II-P supernova SN?2017gmr from hours after discovery through the first 180 days. SN?2017gmr does not show signs of narrow, high-ionization emission lines in the early optical spectra, yet the optical light-curve evolution suggests that an extra energy source from circumstellar medium (CSM) interaction must be present for at least 2 days after explosion. Modeling of the early light curve indicates a ～500 R⊙ progenitor radius, consistent with a rather compact red supergiant, and late-time luminosities indicate that up to 0.130?±?0.026 M⊙ of 56Ni are present, if the light curve is solely powered by radioactive decay, although the 56Ni mass may be lower if CSM interaction contributes to the post-plateau luminosity. Prominent multipeaked emission lines of Hα and [O i] emerge after day 154, as a result of either an asymmetric explosion or asymmetries in the CSM. The lack of narrow lines within the first 2 days of explosion in the likely presence of CSM interaction may be an example of close, dense, asymmetric CSM that is quickly enveloped by the spherical supernova ejecta.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-885-1-AB43E3
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/28434]
专题	中国科学院国家天文台
作者单位	1.Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA; jandrews@as.arizona.edu 2.Department of Physics, University of California, 1 Shields Avenue, Davis, CA 95616-5270, USA 3.Aryabhatta Research Institute of Observational Sciences, Manora Peak, Nainital 263 001, India 4.Department of Physics & Astrophysics, University of Delhi, Delhi-110 007, India 5.Indian Institute of Astrophysics, Koramangala, Bengaluru 560 034, India 6.Joint Astronomy Programme, Department of Physics, Indian Institute of Science, Bengaluru 560012, India 7.Department of Physics, University of California, Santa Barbara, CA 93106-9530, USA 8.Las Cumbres Observatory, 6740 Cortona Drive, Suite 102, Goleta, CA 93117-5575, USA 9.Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, TX 77843, USA 10.Center for Astrophysics, Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138-1516, USA
推荐引用方式 GB/T 7714	Andrews,Jennifer E.,Sand,D. J.,Valenti,S.,et al. SN 2017gmr: An Energetic Type II-P Supernova with Asymmetries[J]. The Astrophysical Journal,2019,885(1).
APA	Andrews,Jennifer E..,Sand,D. J..,Valenti,S..,Smith,Nathan.,Dastidar,Raya.,...&Zhang,Junbo.(2019).SN 2017gmr: An Energetic Type II-P Supernova with Asymmetries.The Astrophysical Journal,885(1).
MLA	Andrews,Jennifer E.,et al."SN 2017gmr: An Energetic Type II-P Supernova with Asymmetries".The Astrophysical Journal 885.1(2019).