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Discovery of the Closest Ultra-stripped Supernova: SN 2021agco in UGC 3855

文献类型：期刊论文

作者Yan, Shengyu1; Wang, Xiaofeng1,11; Gao, Xing10; Zhang JJ(张居甲)6,8,9; Filippenko, Alexei V.2; Brink, Thomas G.2; Mo, Jun1; Lin, Weili1; Xiang, Danfeng1; Ma, Xiaoran1
刊名ASTROPHYSICAL JOURNAL LETTERS
出版日期2023-12-01
卷号959期号:2
ISSN号2041-8205
DOI10.3847/2041-8213/ad0cc3
产权排序第4完成单位
文献子类Article
英文摘要We present the discovery and studies of the helium-rich, fast-evolving supernova (SN) 2021agco at a distance of similar to 40 Mpc. Its early-time flux is found to rise from half peak to the peak of -16.06 +/- 0.42 mag in the r band within 2.4-1.0+1.5 days, and the post-peak light curves also decline at a much faster pace relative to normal stripped-envelope supernovae (SNe) of Type Ib/Ic. The early-time spectrum of SN 2021agco (t approximate to 1.0 days after the peak) is characterized by a featureless blue continuum superimposed with a weak emission line of ionized C iii, and the subsequent spectra show prominent He i lines. Both the photometric and spectroscopic evolution show close resemblances to SN 2019dge, which is believed to have an extremely stripped progenitor. We reproduce the multicolor light curves of SN 2021agco with a model combining shock-cooling emission with 56Ni decay. The best-fit results give an ejecta mass of approximate to 0.3 M circle dot and a synthesized nickel mass of approximate to 2.2 x 10-2 M circle dot. The progenitor is estimated to have an envelope radius of R env approximate to 80 R circle dot and a mass of M env approximate to 0.10 M circle dot. All these suggest that SN 2021agco can be categorized as an ultra-stripped SN Ib, representing the closest object of this rare subtype. This SN is found to explode in the disk of a Sab-type galaxy with an age of similar to 10.0 Gyr and low star-forming activity. Compared to normal SNe Ib/c, the host galaxies of SN 2021agco and other ultra-stripped SNe tend to have relatively lower metallicity, which complicates the properties of their progenitor populations.
学科主题天文学
URL标识查看原文
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
WOS关键词CORE-COLLAPSE SUPERNOVA ; 21-CM LINE MEASUREMENTS ; BLUE OPTICAL TRANSIENT ; LIGHT CURVES ; IB/C SUPERNOVAE ; POSSIBLE ORIGIN ; RICH TRANSIENT ; LOCAL UNIVERSE ; IIB SUPERNOVA ; IC SUPERNOVAE
资助项目MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences; Chinese Academy of Sciences; People's Government of Yunnan Province; Center for Astronomical Mega-Science, CAS
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP Publishing Ltd
WOS记录号WOS:001131973900001
资助机构MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809 ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; Chinese Academy of Sciences ; People's Government of Yunnan Province ; Center for Astronomical Mega-Science, CAS
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/26487]  
专题云南天文台_丽江天文观测站（南方基地）
云南天文台_中国科学院天体结构与演化重点实验室
作者单位1.Department of Physics and Tsinghua Center for Astrophysics (THCA), Tsinghua University, Haidian District, Beijing 100084, People's Republic of China wang_xf@mail.tsinghua.edu.cn;
2.Department of Astronomy, University of California, Berkeley, CA 94720-3411, USA;
3.INAF—Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, I-35122 Padova, Italy;
4.Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Beijing 100101, People's Republic of China;
5.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China;
6.International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, People's Republic of China;
7.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China
8.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, People's Republic of China;
9.Yunnan Observatories, Chinese Academy of Sciences, Kunming 260216, People's Republic of China;
10.Xinjiang Astronomical Observatory, Urumqi 830011, People's Republic of China;
推荐引用方式
GB/T 7714		 Yan, Shengyu,Wang, Xiaofeng,Gao, Xing,et al. Discovery of the Closest Ultra-stripped Supernova: SN 2021agco in UGC 3855[J]. ASTROPHYSICAL JOURNAL LETTERS,2023,959(2).
APA Yan, Shengyu.,Wang, Xiaofeng.,Gao, Xing.,张居甲.,Filippenko, Alexei V..,...&Zhang, Tianmeng.(2023).Discovery of the Closest Ultra-stripped Supernova: SN 2021agco in UGC 3855.ASTROPHYSICAL JOURNAL LETTERS,959(2).
MLA Yan, Shengyu,et al."Discovery of the Closest Ultra-stripped Supernova: SN 2021agco in UGC 3855".ASTROPHYSICAL JOURNAL LETTERS 959.2(2023).

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