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, Abdusamatjan1,5; Wang, Xiaofeng6; Esamdin, Ali1,5; Zeng, Xiangyun7,8; Pellegrino, Craig9; Yan, Shengyu6; Liu, Jialian6; Filippenko, Alexei V.10; Howell, D. Andrew11,27; McCully, Curtis |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2025-05-09 |
| 卷号 | 984期号:2页码:57-62 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/adb3a4 |
| 产权排序 | 1 |
| 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. |
| 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 ; National Natural Science Foundation of China ; Natural Science Foundation of Xinjiang Uygur Autonomous Region ; Tianshan Talent Training Program ; Central Guidance for Local Science and Technology Development Fund ; New Cornerstone Science Foundation ; Chinese Academy of Sciences (CAS) Light of West China Program ; Strategic Priority Research Program of the Chinese Academy of Sciences ; High-Level Talent-Heaven Lake Program of Xinjiang Uygur Autonomous Region of China ; NKFIH/OTKA ; National Research, Development and Innovation (NRDI) Office of Hungary ; NSF |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/7745]  |
| 专题 | 光学天文与技术应用研究室_变星研究团组 |
| 通讯作者 | Wang, Xiaofeng; Esamdin, Ali |
| 作者单位 | 1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China 2.NASA, Astrophys Sci Div, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA 3.Univ Szeged, Inst Phys, Dept Expt Phys, Dom ter 9, Szeged, Hungary 4.MTA Ctr Excellence, Budapest, Hungary 5.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 6.Tsinghua Univ, Phys Dept, Beijing, Peoples R China 7.Three Gorges Univ, Ctr Astron & Space Sci, Yichang 443000, Peoples R China 8.Three Gorges Univ, Coll Sci, Yichang 443000, Peoples R China 9.Goddard Space Flight Ctr, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA 10.Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA |
| 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):57-62. |
| 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),57-62. |
| 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):57-62. |
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来源：新疆天文台
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