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SN 2017fgc: A Fast-expanding Type Ia Supernova Exploded in Massive Shell Galaxy NGC 474

文献类型：期刊论文

作者Zeng,Xiangyun19,20; Wang,Xiaofeng17,18; Esamdin,Ali20; Pellegrino,Craig1,2; Burke,Jamison1,2; Stahl,Benjamin E.15,16; Zheng,WeiKang16; Filippenko,Alexei V.14,16; Howell,D. Andrew1,2; Sand,D. J.13
刊名The Astrophysical Journal
出版日期2021-09-01
卷号919期号:1页码:22
关键词Supernovae Type Ia supernovae
ISSN号0004-637X
DOI10.3847/1538-4357/ac0e9c
通讯作者Wang,Xiaofeng()
英文摘要Abstract We present extensive optical photometric and spectroscopic observations of the high-velocity (HV) Type Ia supernova (SN Ia) 2017fgc, covering the phase from ～12 days before to ～389 days after maximum brightness. SN 2017fgc is similar to normal SNe Ia, with an absolute peak magnitude of M max B ≈ ?19.32 ± 0.13 mag and a post-peak decline of Δm15(B) = 1.05 ± 0.07 mag. Its peak bolometric luminosity is derived as (1.32 ± 0.13) × 1043 erg s?1, corresponding to a 56Ni mass of 0.51 ± 0.03 M⊙. The light curves of SN 2017fgc are found to exhibit excess emission in the UBV bands in the early nebular phase and pronounced secondary shoulder/maximum features in the RrIi bands. Its spectral evolution is similar to that of HV SNe Ia, with a maximum-light Si ii velocity of 15,000 ± 150 km s?1 and a post-peak velocity gradient of ～120 ± 10 km s?1 day?1. The Fe ii and Mg ii lines blended near 4300 ? and the Fe ii, Si ii, and Fe iii lines blended near 4800 ? are obviously stronger than those of normal SNe Ia. Inspecting a large sample reveals that the strength of the two blends in the spectra, and the secondary peak in the i/r-band light curves, are found to be positively correlated with the maximum-light Si ii velocity. Such correlations indicate that HV SNe Ia may experience more complete burning in the ejecta and/or that their progenitors have higher metallicity. Examining the birthplace environment of SN 2017fgc suggests that it likely arose from a stellar environment with young and high-metallicity populations.
WOS关键词DELAYED-DETONATION MODEL ; LIGHT CURVES ; FOLLOW-UP ; INFRARED OBSERVATIONS ; CIRCUMSTELLAR MATTER ; SPECTRAL EVOLUTION ; OPTICAL-SPECTRA ; DATA RELEASE ; RISE-TIME ; PROGRAM
资助项目National Natural Science Foundation of China (NSFC)[11873081] ; National Natural Science Foundation of China (NSFC)[U2031209] ; National Natural Science Foundation of China (NSFC)[12033002] ; National Natural Science Foundation of China (NSFC)[11633002] ; National Natural Science Foundation of China (NSFC)[11803076] ; National Natural Science Foundation of China (NSFC)[11761141001] ; National Natural Science Foundation of China (NSFC)[11773067] ; National Natural Science Foundation of China (NSFC)[11403096] ; National Program on Key Research and Development Project[2016YFA0400803] ; High Level Talent-Heaven Lake Program of Xinjiang Uygur Autonomous Region of China ; Scholar Program of the Beijing Academy of Science and Technology[DZ:BS202002] ; Chinese Academy of Sciences ; People's Government of Yunnan Province ; Youth Innovation Promotion Association of the CAS[2018081] ; Ten Thousand Talents Program of Yunnan for Topnotch Young Talents ; TABASGO Foundation ; Christopher R. Redlich Fund ; Miller Institute for Basic Research in Science ; U.S. National Science Foundation (NSF)[AST-1821967] ; U.S. National Science Foundation (NSF)[1821987] ; U.S. National Science Foundation (NSF)[1813708] ; U.S. National Science Foundation (NSF)[1813466] ; U.S. National Science Foundation (NSF)[1908972] ; Heising-Simons Foundation[2020-1864] ; NSF[AST-1911225]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号IOP:0004-637X-919-1-AC0E9C
出版者The American Astronomical Society
资助机构National Natural Science Foundation of China (NSFC) ; National Program on Key Research and Development Project ; High Level Talent-Heaven Lake Program of Xinjiang Uygur Autonomous Region of China ; Scholar Program of the Beijing Academy of Science and Technology ; Chinese Academy of Sciences ; People's Government of Yunnan Province ; Youth Innovation Promotion Association of the CAS ; Ten Thousand Talents Program of Yunnan for Topnotch Young Talents ; TABASGO Foundation ; Christopher R. Redlich Fund ; Miller Institute for Basic Research in Science ; U.S. National Science Foundation (NSF) ; Heising-Simons Foundation ; NSF
源URL[http://ir.xao.ac.cn/handle/45760611-7/4246]  
专题新疆天文台_光学天文与技术应用研究室
通讯作者Wang,Xiaofeng
作者单位1.Las Cumbres Observatory, 6740 Cortona Drive Suite 102, Goleta, CA 93117-5575, USA
2.Department of Physics, University of California, Santa Barbara, CA 93106-9530, USA
3.George P. and Cynthia Woods Mitchell Institute for Fundamental Physics & Astronomy, Texas A&M University, Department of Physics and Astronomy, 4242 TAMU, College Station, TX 77843, USA
4.Department of Chemistry, University of Wisconsin, Madison, WI 53706, USA
5.Center for Astrophysics, Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138-1516, USA
6.Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
7.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People’s Republic of China
8.The School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
9.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People’s Republic of China
10.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, People’s Republic of China
推荐引用方式
GB/T 7714		 Zeng,Xiangyun,Wang,Xiaofeng,Esamdin,Ali,et al. SN 2017fgc: A Fast-expanding Type Ia Supernova Exploded in Massive Shell Galaxy NGC 474[J]. The Astrophysical Journal,2021,919(1):22.
APA Zeng,Xiangyun.,Wang,Xiaofeng.,Esamdin,Ali.,Pellegrino,Craig.,Burke,Jamison.,...&Ma,Shuo.(2021).SN 2017fgc: A Fast-expanding Type Ia Supernova Exploded in Massive Shell Galaxy NGC 474.The Astrophysical Journal,919(1),22.
MLA Zeng,Xiangyun,et al."SN 2017fgc: A Fast-expanding Type Ia Supernova Exploded in Massive Shell Galaxy NGC 474".The Astrophysical Journal 919.1(2021):22.

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