SN 2022vqz: a peculiar subluminous Type Ia supernova with prominent early excess emission

doi:10.1093/mnras/stad3691

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	SN 2022vqz: a peculiar subluminous Type Ia supernova with prominent early excess emission
	Xi, Gaobo 5; Wang, Xiaofeng 4,5; Li, Gaici 5; Liu, Jialian 5; Yan, Shengyu 5; Lin, Weili 5; Zhao, Jieming 5; Filippenko, Alexei V 3; Zheng, WeiKang 3; Brink, Thomas G 3
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2023-12-23
卷号	527 期号:4 页码:9957-9976
关键词	supernovae: general supernovae: individual: SN 2022vqz
ISSN号	0035-8711
DOI	10.1093/mnras/stad3691
产权排序	第8完成单位
文献子类	Article
英文摘要	We present extensive photometric and spectroscopic observations of the peculiar Type Ia supernova (SN Ia) 2022vqz. It shares many similarities with the SN 2002es-like SNe Ia, such as low luminosity (M-B,M-max=-18.11 +/- 0.16 mag) and moderate post-peak decline rate (Delta(m15,B)=1.33 +/- 0.11 mag). The nickel mass synthesised in the explosion is estimated as 0.20 +/- 0.04 M circle dot from the bolometric light curve, which is obviously lower than that of normal SNe Ia. SN 2022vqz is also characterised by slowly expanding ejecta, with Si II velocities persisting around 7000 km s(-1) since 16 days before peak brightness, unique among all known SNe Ia. While all of these properties imply a lower-energy thermonuclear explosion that should leave a considerable amount of unburnt materials, the absent signature of unburnt carbon in spectra of SN 2022vqz is puzzling. A prominent early peak is clearly detected in the ATLAS c- and o-band light curves and in the ZTF gr-band data within days after the explosion. Possible mechanisms for the early peak are discussed, including the sub-Chandrasekhar-mass double-detonation model and interaction of SN ejecta with circumstellar material. We find that both models face some difficulties in replicating all aspects of the observed data. As an alternative, we propose a hybrid C-O-Ne white dwarf as the progenitor of SN 2022vqz; it can simultaneously reconcile the tension between low ejecta velocity and the absence of carbon. We further discuss the diversity of SN 2002es-like objects and their origin in the context of different scenarios.
学科主题	天文学
URL标识	查看原文
出版地	GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
资助项目	National Natural Science Foundation of China (NSFC)[12288102]; National Natural Science Foundation of China (NSFC)[12033003]; National Natural Science Foundation of China (NSFC)[11633002]; Scholar Program of Beijing Academy of Science and Technology[DZ:BS202002]; Tencent Xplorer Prize; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001]; NSFC[12303054]; Christopher R. Redlich Fund; PRIN-INAF 2022, 'Shedding light on the nature of gap transients: from the observations to the models'; Uzbekistan's Ministry of Innovative Development[A-FA-2021-36]; Heising-Simons Foundation[12540303]; NASA[NN12AR55G]; NASA[80NSSC18K0284]; NASA[80NSSC18K1575]; Kepler/K2 grant[J1944/80NSSC19K0112]; Kepler/K2 grant[HST GO-15889]; STFC[ST/T000198/1]; STFC[ST/S006109/1]
WOS关键词	WHITE-DWARFS ; HUBBLE CONSTANT ; MASS ; LUMINOSITY ; TELESCOPE ; EVOLUTION ; SPECTRA ; 1991BG ; PROGENITORS ; UNIVERSE
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:001186620300004
资助机构	National Natural Science Foundation of China (NSFC)[12288102, 12033003, 11633002] ; Scholar Program of Beijing Academy of Science and Technology[DZ:BS202002] ; Tencent Xplorer Prize ; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001] ; NSFC[12303054] ; Christopher R. Redlich Fund ; PRIN-INAF 2022, 'Shedding light on the nature of gap transients: from the observations to the models' ; Uzbekistan's Ministry of Innovative Development[A-FA-2021-36] ; Heising-Simons Foundation[12540303] ; NASA[NN12AR55G, 80NSSC18K0284, 80NSSC18K1575] ; Kepler/K2 grant[J1944/80NSSC19K0112, HST GO-15889] ; STFC[ST/T000198/1, ST/S006109/1]
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ynao.ac.cn/handle/114a53/26537]
专题	云南天文台_丽江天文观测站（南方基地）
作者单位	1.INAF – Osservatorio Astronomico di Brera, Via E. Bianchi 46, I-23807 Merate (LC), Italy; 2.Ulugh Beg Astronomical Institute, Uzbekistan Academy of Sciences, Tashkent 100052, Uzbekistan; 3.Department of Astronomy, University of California, Berkeley, CA 94720-3411, USA; 4.Beijing Planetarium, Beijing Academy of Science and Technology, Beijing 100044, China; 5.Physics Department and Tsinghua Center for Astrophysics, Tsinghua University, Beijing 100084, China; 6.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 101408, China 7.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China; 8.International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, China; 9.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China; 10.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China;
推荐引用方式 GB/T 7714	Xi, Gaobo,Wang, Xiaofeng,Li, Gaici,et al. SN 2022vqz: a peculiar subluminous Type Ia supernova with prominent early excess emission[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2023,527(4):9957-9976.
APA	Xi, Gaobo.,Wang, Xiaofeng.,Li, Gaici.,Liu, Jialian.,Yan, Shengyu.,...&Xiang, Danfeng.(2023).SN 2022vqz: a peculiar subluminous Type Ia supernova with prominent early excess emission.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,527(4),9957-9976.
MLA	Xi, Gaobo,et al."SN 2022vqz: a peculiar subluminous Type Ia supernova with prominent early excess emission".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 527.4(2023):9957-9976.