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SN 2024aecx: A Double-peaked Rapidly Evolving Type IIb Supernova at 11 Mpc

文献类型：期刊论文

作者Zou, Xingzhu1,5; Kumar, Brajesh1,5; Teja, Rishabh Singh2,3; Sahu, D. K.2; Chen, Xinlei1,5; Singh, Avinash4,6; Lin, Weikang1,5; Liu, Xiangkun1,5; Liu, Dezi1,5; Das, Hrishav2
刊名ASTROPHYSICAL JOURNAL
出版日期2026-01-20
卷号997期号:1
ISSN号0004-637X
DOI10.3847/1538-4357/ae21dd
产权排序第7完成单位
文献子类Article
英文摘要We present the results of low-resolution spectroscopic and densely sampled multiband photometric follow-up of supernova (SN) 2024aecx. The SN was discovered in the spiral galaxy NGC 3521 (distance similar to 11 Mpc) within a day after the explosion. The early spectra of SN 2024aecx show a weak signature of hydrogen lines, which disappeared in similar to 30 days after the explosion. Light curves in all bands show a distinct feature of two peaks, and the first peak is likely due to the emission from shock cooling. The early-phase evolution of the light curve of SN 2024aecx is similar to the typical Type IIb events, but the decay rate in different bands (e.g., Delta m(15) = 1.60 +/- 0.05 mag, g band) is significantly faster in the postpeak phase. It attained the secondary maximum in similar to 19 days (g band) with a peak absolute magnitude of M-g = -17.94 +/- 0.10 mag. The colors of SN 2024aecx tend to be redder in early epochs (<8 days), then it grows bluer for a period, then redder again >20 days after explosion. The analytical model fitting to the light curves reveals an envelope mass and progenitor radius in the ranges similar to 0.03-0.24 M-circle dot and similar to 169-200 R-circle dot, respectively. Modeling of the pseudobolometric light curve suggests that synthesized Ni-56 in the explosion was similar to 0.15 M-circle dot with ejecta mass and kinetic energy of similar to 0.7 M-circle dot and similar to 0.16 x 10(51) erg, respectively. The observational properties and modeling indicate that the progenitor of SN 2024aecx belongs to the category of extended progenitors.
学科主题天文学 ; 恒星与银河系
URL标识查看原文
出版地No.2 The Distillery, Glassfields, Avon Street, Bristol, ENGLAND
WOS关键词STRIPPED-ENVELOPE SUPERNOVAE ; BOLOMETRIC LIGHT CURVES ; CORE-COLLAPSE ; IB SUPERNOVAE ; OPTICAL OBSERVATIONS ; UV/OPTICAL EMISSION ; COMPACT PROGENITOR ; PRECURSOR ACTIVITY ; ANALYTIC SOLUTIONS ; UBVRI PHOTOMETRY
资助项目South-Western Institute for Astronomy Research of Yunnan University (SWIFAR-YNU) - Yunnan University Development Plan for World-Class University; South-Western Institute for Astronomy Research of Yunnan University (SWIFAR-YNU) - Yunnan University Development Plan for World-Class Astronomy Discipline; Science & Technology Champion Project[202005AB160002]; Yunnan Revitalization Talent Support Program[202305AT350002]; Yunnan Revitalization Talent Support Program[202105AE160021]; National Key Research and Development Program of China[2024YFA1611603]; Key Laboratory of Survey Science of Yunnan Province[202449CE340002]; The Special Project for High-End Foreign Experts, Xingdian Funding from Yunnan Province; National Natural Science Foundation of China[12173082]; National Natural Science Foundation of China[12333008]; Yunnan Fundamental Research Projects[202501AV070012]; Yunnan Fundamental Research Projects[202401BC070007]; Yunnan Fundamental Research Projects[202201AT070069]; Top notch Young Talents Program of Yunnan Province; Chinese Academy of Sciences; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001663046600001
出版者IOP Publishing Ltd
资助机构South-Western Institute for Astronomy Research of Yunnan University (SWIFAR-YNU) - Yunnan University Development Plan for World-Class University ; South-Western Institute for Astronomy Research of Yunnan University (SWIFAR-YNU) - Yunnan University Development Plan for World-Class Astronomy Discipline ; Science & Technology Champion Project[202005AB160002] ; Yunnan Revitalization Talent Support Program[202305AT350002, 202105AE160021] ; National Key Research and Development Program of China[2024YFA1611603] ; Key Laboratory of Survey Science of Yunnan Province[202449CE340002] ; The Special Project for High-End Foreign Experts, Xingdian Funding from Yunnan Province ; National Natural Science Foundation of China[12173082, 12333008] ; Yunnan Fundamental Research Projects[202501AV070012, 202401BC070007, 202201AT070069] ; Top notch Young Talents Program of Yunnan Province ; Chinese Academy of Sciences ; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001]
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/28851]  
专题云南天文台_丽江天文观测站（南方基地）
通讯作者Kumar, Brajesh
作者单位1.Yunnan Key Laboratory of Survey Science, Yunnan University, Kunming, Yunnan 650500, People’s Republic of China;
2.Indian Institute of Astrophysics, II Block, Koramangala, Bengaluru-560034, Karnataka, India;
3.Tsung-Dao Lee Institute, Shanghai Jiao Tong University, No.1 Lisuo Road, Pudong New Area, Shanghai, People’s Republic of China;
4.The Oskar Klein Centre, Department of Astronomy, Stockholm University, AlbaNova, SE-10691 Stockholm, Sweden;
5.South-Western Institute for Astronomy Research, Yunnan University, Kunming, Yunnan 650504, People’s Republic of China; brajesh@ynu.edu.cn, brajesharies@gmail.com, x.liu@ynu.edu.cn;
6.Hiroshima Astrophysical Science Center, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan;
7.Yunnan Observatories (YNAO), Chinese Academy of Sciences (CAS), Kunming, 650216, People’s Republic of China;
8.International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, People’s Republic of China;
9.Key Laboratory for the Structure and Evolution of Celestial Objects, CAS, Kunming 650216, People’s Republic of China;
10.Tianjin Astrophysics Center, Tianjin Normal University, Tianjin 300387, People’s Republic of China
推荐引用方式
GB/T 7714		 Zou, Xingzhu,Kumar, Brajesh,Teja, Rishabh Singh,et al. SN 2024aecx: A Double-peaked Rapidly Evolving Type IIb Supernova at 11 Mpc[J]. ASTROPHYSICAL JOURNAL,2026,997(1).
APA Zou, Xingzhu.,Kumar, Brajesh.,Teja, Rishabh Singh.,Sahu, D. K..,Chen, Xinlei.,...&Liu, Xiaowei.(2026).SN 2024aecx: A Double-peaked Rapidly Evolving Type IIb Supernova at 11 Mpc.ASTROPHYSICAL JOURNAL,997(1).
MLA Zou, Xingzhu,et al."SN 2024aecx: A Double-peaked Rapidly Evolving Type IIb Supernova at 11 Mpc".ASTROPHYSICAL JOURNAL 997.1(2026).

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来源：云南天文台

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