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SN 2021hpr: A Normal Type Ia Supernova Showing Excess Emission in the Early Rising Phase

文献类型：期刊论文

作者Iskandar, Abdusamatjan1,2; Wang, Xiaofeng3; Esamdin, Ali1,2; Zeng, Xiangyun4,5; Pellegrino, Craig6; Yan, Shengyu3; Liu, Jialian3; Filippenko, Alexei V.7; Howell, D. Andrew8,9; McCully, Curtis8,9
刊名ASTROPHYSICAL JOURNAL
出版日期2025-05-09
卷号984期号:2
ISSN号0004-637X
DOI10.3847/1538-4357/adb3a4
产权排序第10完成单位
文献子类Article
英文摘要We present extensive optical observations of a nearby Type Ia supernova (SN Ia), SN 2021hpr, located in the spiral galaxy NGC 3147 at a distance of similar to 45 Mpc. Our observations cover a phase within similar to 1-2 days to similar to 290 days after the explosion. SN 2021hpr is found to be a spectroscopically normal SN Ia, with an absolute B-band peak magnitude of Mmax(B)approximate to-19.16 +/- 0.14 mag and a postpeak decline rate of Delta m15(B) = 1.0 +/- 0.01 mag. Early time light curves showed a similar to 7.0% excess emission compared to a homogeneously expanding fireball model, likely due to SN ejecta interacting with a companion or immediate circumstellar matter (CSM). The optical spectra of SN 2021hpr are overall similar to those of normal SNe Ia, but characterized by prominent detached high-velocity features (HVFs) of Si ii and Ca ii in the early phase. After examining a small sample of well-observed normal SNe Ia, we find that the HVFs are likely common for the subgroup with early excess emission. The association of an early bump feature with the HVFs could be attributed to density or abundance enhancement at the outer layer of the exploding star, likely as a result of interactions with companion/CSM or experiencing more complete burning. Nevertheless, the redshifted Fe ii and Ni ii lines in the nebular-phase spectra of SN 2021hpr, contrary to the blueshift trend seen in other SNe Ia showing early bump features, indicate its peculiarity in the explosion that remains to be understood.
学科主题天文学 ; 恒星与银河系
URL标识查看原文
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
WOS关键词NEAR-INFRARED OBSERVATIONS ; DELAYED-DETONATION MODELS ; LATE-TIME SPECTRA ; EARLY LIGHT-CURVE ; WHITE-DWARFS ; PROGENITOR CONSTRAINTS ; NEBULAR SPECTROSCOPY ; OPTICAL OBSERVATIONS ; DATA RELEASE ; ULTRAVIOLET
资助项目MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[12288102]; MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[12033003]; MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[12203029]; MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[12373038]; MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[11803076]; MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[12433007]; National Natural Science Foundation of China[2024D01D32]; Natural Science Foundation of Xinjiang Uygur Autonomous Region[2023TSYCLJ0053]; Natural Science Foundation of Xinjiang Uygur Autonomous Region[2023TSYCCX0101]; Tianshan Talent Training Program[ZYYD2025QY2]; Central Guidance for Local Science and Technology Development Fund; New Cornerstone Science Foundation[2020-XBQNXZ-016]; Chinese Academy of Sciences (CAS) Light of West China Program[XDB0550100]; Chinese Academy of Sciences (CAS) Light of West China Program[XDB0550000]; Strategic Priority Research Program of the Chinese Academy of Sciences; High-Level Talent-Heaven Lake Program of Xinjiang Uygur Autonomous Region of China[FK-134432]; NKFIH/OTKA; National Research, Development and Innovation (NRDI) Office of Hungary[AST-1911151]; National Research, Development and Innovation (NRDI) Office of Hungary[AST-1911225]; NSF
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001485158300001
出版者IOP Publishing Ltd
资助机构MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[12288102, 12033003, 12203029, 12373038, 11803076, 12433007] ; National Natural Science Foundation of China[2024D01D32] ; Natural Science Foundation of Xinjiang Uygur Autonomous Region[2023TSYCLJ0053, 2023TSYCCX0101] ; Tianshan Talent Training Program[ZYYD2025QY2] ; Central Guidance for Local Science and Technology Development Fund ; New Cornerstone Science Foundation[2020-XBQNXZ-016] ; Chinese Academy of Sciences (CAS) Light of West China Program[XDB0550100, XDB0550000] ; Strategic Priority Research Program of the Chinese Academy of Sciences ; High-Level Talent-Heaven Lake Program of Xinjiang Uygur Autonomous Region of China[FK-134432] ; NKFIH/OTKA ; National Research, Development and Innovation (NRDI) Office of Hungary[AST-1911151, AST-1911225] ; NSF
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/28310]  
专题云南天文台_丽江天文观测站（南方基地）
作者单位1.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, People's Republic of China; aliyi@xao.ac.cn;
2.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China;
3.Physics Department, Tsinghua University, Beijing 100084, People's Republic of China; wang_xf@mail.tsinghua.edu.cn;
4.Center for Astronomy and Space Sciences, Three Gorges University, YiChang 443000, People's Republic of China;
5.College of Sciences, Three Gorges University, YiChang 443000, People's Republic of China;
6.Goddard Space Flight Center, 8800 Greenbelt Rd, Greenbelt, MD 20771, USA;
7.Department of Astronomy, University of California, Berkeley, CA 94720-3411, USA;
8.Las Cumbres Observatory, 6740 Cortona Drive Suite 102, Goleta, CA 93117-5575, USA;
9.Department of Physics, University of California, Santa Barbara, CA 93106-9530, USA;
10.Yunnan Observatories (YNAO), Chinese Academy of Sciences, Kunming 650216, People's Republic of China;
推荐引用方式
GB/T 7714		 Iskandar, Abdusamatjan,Wang, Xiaofeng,Esamdin, Ali,et al. SN 2021hpr: A Normal Type Ia Supernova Showing Excess Emission in the Early Rising Phase[J]. ASTROPHYSICAL JOURNAL,2025,984(2).
APA Iskandar, Abdusamatjan.,Wang, Xiaofeng.,Esamdin, Ali.,Zeng, Xiangyun.,Pellegrino, Craig.,...&Zhang, Mengfan.(2025).SN 2021hpr: A Normal Type Ia Supernova Showing Excess Emission in the Early Rising Phase.ASTROPHYSICAL JOURNAL,984(2).
MLA Iskandar, Abdusamatjan,et al."SN 2021hpr: A Normal Type Ia Supernova Showing Excess Emission in the Early Rising Phase".ASTROPHYSICAL JOURNAL 984.2(2025).

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