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

doi:10.3847/1538-4357/ac0e9c

	SN 2017fgc: A Fast-expanding Type Ia Supernova Exploded in Massive Shell Galaxy NGC 474
	Zeng,Xiangyun 2,3; Wang,Xiaofeng 4,5; Esamdin,Ali 2; Pellegrino,Craig 6,7; Burke,Jamison 6,7; Stahl,Benjamin E.8,9; Zheng,WeiKang 8; Filippenko,Alexei V.8,10; Howell,D. Andrew 6,7; Sand,D. J.11
刊名	The Astrophysical Journal
	2021-09-01
卷号	919 期号:1 页码:22
关键词	Supernovae Type Ia supernovae
ISSN号	0004-637X
DOI	10.3847/1538-4357/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.
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关键词	DELAYED-DETONATION MODEL ; LIGHT CURVES ; FOLLOW-UP ; INFRARED OBSERVATIONS ; CIRCUMSTELLAR MATTER ; SPECTRAL EVOLUTION ; OPTICAL-SPECTRA ; DATA RELEASE ; RISE-TIME ; PROGRAM
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-919-1-AC0E9C
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
内容类型	期刊论文
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.The School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel 2.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, People’s Republic of China; wang_xf@mail.tsinghua.edu.cn 3.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China; aliyi@xao.ac.cn 4.Physics Department and Tsinghua Center for Astrophysics (THCA), Tsinghua University, Beijing 100084, People’s Republic of China 5.Beijing Planetarium, Beijing Academy of Science of Technology, Beijing 100044, People’s Republic of China 6.Department of Physics, University of California, Santa Barbara, CA 93106-9530, USA 7.Las Cumbres Observatory, 6740 Cortona Drive Suite 102, Goleta, CA 93117-5575, USA 8.Department of Astronomy, University of California, Berkeley, CA 94720-3411, USA 9.Department of Physics, University of California, Berkeley, CA 94720-7300, USA 10.Miller Senior Fellow, Miller Institute for Basic Research in Science, University of California, Berkeley, CA 94720, USA
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.