SN 2021dbg: A Luminous Type IIP-IIL Supernova Exploding from a Massive Star with a Layered Shell

doi:10.3847/1538-4357/ad5fe8

YNAO OpenIR > 南方基地

	SN 2021dbg: A Luminous Type IIP-IIL Supernova Exploding from a Massive Star with a Layered Shell
	Zhao ZY(赵泽毅)1,2,3,4 ; Zhang JJ(张居甲)1,3,4 ; Li LP(李丽萍)1,3,4 ; Zhai Q(翟倩)1,4 ; Cai YZ(蔡永志)1,4 ; Srivastav, Shubham 5; Wang, Xiaofeng 6,7; Lin H(林含)1,3,8 ; Yang, Yi 6,9; Filippenko, Alexei V.9; Brink, Thomas G.9; Zheng, WeiKang 9
发表期刊	ASTROPHYSICAL JOURNAL
	2024-10-01
卷号	973 期号:2
DOI	10.3847/1538-4357/ad5fe8
产权排序	第1完成单位
收录类别	SCI
摘要	We present extensive observations and analysis of supernova (SN) SN 2021dbg, utilizing optical photometry and spectroscopy. For approximately 385 days following the explosion, SN 2021dbg exhibited remarkable luminosity, surpassing most Type II SNe (SNe II). This initial high luminosity is potentially attributed to interaction between the ejected material and the surrounding circumstellar material (CSM), as evidenced by the pronounced interaction signatures observed in its spectra. The subsequent high luminosity is primarily due to the significant 56Ni mass (0.17 +/- 0.05 M circle dot) produced in the explosion. Based on the flux of flash emission lines detected in the initial spectra, we estimate that the CSM mass near the progenitor amounted to similar to(1.0-2.0) x 10-3 M circle dot, likely resulting from intense stellar wind activity 2-3 yr preceding the explosion. Considering the bolometric light curve, nebular spectrum modeling, and mass-loss rate, we suggest that the progenitor of SN 2021dbg was a red supergiant (RSG) with a mass of similar to 20 M circle dot and a radius of 1200 R circle dot. This RSG featured a thick hydrogen shell, which may have contained a region with a sharp decrease in material density, electron density, and temperature, contributing to its layered structure. This object demonstrates mixed features of Type IIP and IIL SNe, making it a transitional event linking the above two subclasses of SNe II.
资助项目	National Key R&D Program of China[2021YFA1600404]; National Natural Science Foundation of China[12033003]; National Natural Science Foundation of China[12333008]; National Natural Science Foundation of China[12288102]; National Natural Science Foundation of China[12173082]; National Natural Science Foundation of China[12303054]; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001]; China Manned Space Project[CMS-CSST-2021-A12]; Yunnan Fundamental Research Projects[202401AU070063]; Yunnan Fundamental Research Projects[202401BC070007]; Yunnan Fundamental Research Projects[202201AT070069]; Top-notch Young Talents Program of Yunnan Province; Chinese Academy of Sciences; Tencent Xplorer Prize; Christopher R. Redlich Fund; W. M. Keck Foundation; CAS; People's Government of Yunnan Province
项目资助者	National Key R&D Program of China[2021YFA1600404] ; National Natural Science Foundation of China[12033003, 12333008, 12288102, 12173082, 12303054] ; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001] ; China Manned Space Project[CMS-CSST-2021-A12] ; Yunnan Fundamental Research Projects[202401AU070063, 202401BC070007, 202201AT070069] ; Top-notch Young Talents Program of Yunnan Province ; Chinese Academy of Sciences ; Tencent Xplorer Prize ; Christopher R. Redlich Fund ; W. M. Keck Foundation ; CAS ; People's Government of Yunnan Province
语种	英语
学科领域	天文学
文章类型	Article
出版者	IOP Publishing Ltd
出版地	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN	0004-637X
URL	查看原文
WOS记录号	WOS:001320440900001
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	LIGHT-CURVES ; P SUPERNOVA ; CIRCUMSTELLAR MATERIAL ; PROGENITOR MASS ; SHOCK BREAKOUT ; SPECTROSCOPIC EVOLUTION ; PHYSICAL-PROPERTIES ; LATE BEHAVIOR ; EXPLOSION ; PHOTOMETRY
引用统计
文献类型	期刊论文
版本	出版稿
条目标识符	http://ir.ynao.ac.cn/handle/114a53/27621
专题	南方基地中国科学院天体结构与演化重点实验室
作者单位	1.Yunnan Observatories (YNAO), Chinese Academy of Sciences (CAS), Kunming 650216, People's Republic of China; [email protected]; 2.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China; 3.International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, People's Republic of China; 4.Key Laboratory for the Structure and Evolution of Celestial Objects, CAS, Kunming 650216, People's Republic of China; 5.Astrophysics Research Centre, School of Mathematics and Physics, Queens University Belfast, Belfast BT7 1NN, UK; 6.Department of Physics, Tsinghua University, Beijing 100084, People's Republic of China; 7.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, People's Republic of China; 8.Key Laboratory of Radio Astronomy and Technology, CAS, A20 Datun Road, Chaoyang District, Beijing 100101, People's Republic of China; 9.Department of Astronomy, University of California, Berkeley, CA 94720-3411, USA
第一作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	Zhao ZY,Zhang JJ,Li LP,et al. SN 2021dbg: A Luminous Type IIP-IIL Supernova Exploding from a Massive Star with a Layered Shell[J]. ASTROPHYSICAL JOURNAL,2024,973(2).
APA	赵泽毅.,张居甲.,李丽萍.,翟倩.,蔡永志.,...&Zheng, WeiKang.(2024).SN 2021dbg: A Luminous Type IIP-IIL Supernova Exploding from a Massive Star with a Layered Shell.ASTROPHYSICAL JOURNAL,973(2).
MLA	赵泽毅,et al."SN 2021dbg: A Luminous Type IIP-IIL Supernova Exploding from a Massive Star with a Layered Shell".ASTROPHYSICAL JOURNAL 973.2(2024).

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