SN 2023xqm: A gradually fading Ia supernova exhibiting isolated high-velocity signatures

doi:10.1051/0004-6361/202452864

	SN 2023xqm: A gradually fading Ia supernova exhibiting isolated high-velocity signatures
	Zeng, Xiangyun 1,2,3; Luo, Yijing 1,2; Wang, Xiaofeng 3,4,5; Li, Xin 3; Yang, Yi 4,5; Zheng, Sheng 1,2; Zeng, Shuguang 1,2; Huang, Yao 1,2; Li, Sai 1,2; Howell, D. Andrew 6,7; Bostroem, K. Azalee 6,7; Mccully, Curtis 6,7; Esamdin, Ali8 ; Andrews, Moira 6,7; Farah, Joseph R.6,7; Newsome, Megan 6,7; Zhang, Haonan 2; Zhang, Peng 1,2; Hu, Lei 1,2
	2025-05-28
Source Publication	ASTRONOMY & ASTROPHYSICS
ISSN	0004-6361
Volume	698 Pages:12
Contribution Rank	1;2;3;4;5;6;7;8
Abstract	We conducted an exhaustive analysis combining optical photometry and spectroscopy of the type Ia supernova designated SN 2023xqm. Our observational period spanned from the two weeks preceding to 88 days after the B-band peak luminosity time. We determined the peak brightness in the B-band to be -18.90 +/- 0.50 mag, and it is accompanied by a moderately slow decay rate of 0.90 +/- 0.07 mag. The maximum quasi-bolometric luminosity was estimated to be 1.52 x 10(43) erg s(-1) and correlated with a calculated Ni-56 mass of 0.74 +/- 0.05 M-circle dot, aligning with the modestly reduced rate of light curve decay. A plateau that can be observed in the r - i color curve might correlate with the minor elevation noted between the principal and secondary peaks of the i-band light curve. An initial spectral analysis of SN 2023xqm revealed distinct high-velocity features (HVFs) in Ca II that contrast with the subdued HVFs observed in Si II. Such attributes may stem from variations in ionization or temperature or from scenarios involving enhanced element abundance, suggesting a naturally lower photospheric temperature for SN 2023xqm, which could be indicative of incomplete burning during the white dwarf's detonation. The observed traits in the light curve and the spectral features offer significant insights into the variability among type Ia supernovae and their explosion dynamics.
Keyword	supernovae: general supernovae: individual: SN 2023xqm
DOI	10.1051/0004-6361/202452864
Indexed By	SCI
Language	英语
WOS Keyword	DELAYED-DETONATION MODELS ; CORE-DEGENERATE SCENARIO ; HUBBLE-SPACE-TELESCOPE ; INFRARED LIGHT CURVES ; EARLY EXCESS EMISSION ; DOUBLE WHITE-DWARFS ; OPTICAL SPECTROSCOPY ; POPULATION SYNTHESIS ; ESC OBSERVATIONS ; LOCAL VALUE
Funding Project	National Natural Science Foundation of Chinahttp://dx.doi.org/10.13039/501100001809[2024D01D32] ; Natural Science Foundation of Xinjiang Uygur Autonomous Region[12288102] ; Natural Science Foundation of Xinjiang Uygur Autonomous Region[12033003] ; National Natural Science Foundation of China ; High Level Talent-Heaven Lake Program of Xinjiang Uygur Autonomous Region of China ; Tencent Xplorer prize[24CD013] ; InnovationProject of Beijing Academy of Science and Technology[AST-1911225] ; InnovationProject of Beijing Academy of Science and Technology[AST-1911151] ; NSF[NN12AR55G] ; NSF[80NSSC18K0284] ; NSF[80NSSC18K1575] ; NASA ; Asteroid Terrestrial-impact Last Alert System (ATLAS) project ; Asteroid Terrestrial-impact Last Alert System (ATLAS) ; Queen's University Belfast ; South African Astronomical Observatory
WOS Research Area	Astronomy & Astrophysics
WOS Subject	Astronomy & Astrophysics
WOS ID	WOS:001497903100016
Publisher	EDP SCIENCES S A
Funding Organization	National Natural Science Foundation of Chinahttp://dx.doi.org/10.13039/501100001809 ; Natural Science Foundation of Xinjiang Uygur Autonomous Region ; National Natural Science Foundation of China ; High Level Talent-Heaven Lake Program of Xinjiang Uygur Autonomous Region of China ; Tencent Xplorer prize ; InnovationProject of Beijing Academy of Science and Technology ; NSF ; NASA ; Asteroid Terrestrial-impact Last Alert System (ATLAS) project ; Asteroid Terrestrial-impact Last Alert System (ATLAS) ; Queen's University Belfast ; South African Astronomical Observatory
Citation statistics
Document Type	期刊论文
Identifier	http://ir.xao.ac.cn/handle/45760611-7/7799
Collection	光学天文与技术应用研究室_变星研究团组
Corresponding Author	Wang, Xiaofeng; Zheng, Sheng
Affiliation	1.China Three Gorges Univ, Ctr Astron & Space Sci, Yichang 443000, Peoples R China 2.China Three Gorges Univ, Coll Math & Phys, Yichang 443000, Peoples R China 3.Beijing Acad Sci Technol, Beijing Planetarium, Beijing 100044, Peoples R China 4.Tsinghua Univ, Phys Dept, Beijing 100084, Peoples R China 5.Tsinghua Univ, Tsinghua Ctr Astrophys THCA, Beijing 100084, Peoples R China 6.Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA 7.Las Cumbres Observ, 6740 Cortona Dr Suite 102, Goleta, CA 93117 USA 8.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China
Recommended Citation GB/T 7714	Zeng, Xiangyun,Luo, Yijing,Wang, Xiaofeng,et al. SN 2023xqm: A gradually fading Ia supernova exhibiting isolated high-velocity signatures[J]. ASTRONOMY & ASTROPHYSICS,2025,698:12.
APA	Zeng, Xiangyun.,Luo, Yijing.,Wang, Xiaofeng.,Li, Xin.,Yang, Yi.,...&Hu, Lei.(2025).SN 2023xqm: A gradually fading Ia supernova exhibiting isolated high-velocity signatures.ASTRONOMY & ASTROPHYSICS,698,12.
MLA	Zeng, Xiangyun,et al."SN 2023xqm: A gradually fading Ia supernova exhibiting isolated high-velocity signatures".ASTRONOMY & ASTROPHYSICS 698(2025):12.

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