SN 2017hpa: A Nearby Carbon-rich Type Ia Supernova with a Large Velocity Gradient | |
Zeng, Xiangyun9,10; Wang, Xiaofeng7,8; Esamdin, Ali10; Pellegrino, Craig5,11; Zheng, WeiKang3; Zhang JJ(张居甲)1,2,20; Mo, Jun8; Li, Wenxiong8,12; Howell, D. Andrew5,11; Filippenko, Alexei V.3,14 | |
刊名 | ASTROPHYSICAL JOURNAL |
2021-03-01 | |
卷号 | 909期号:2页码:19 |
关键词 | Supernovae Type Ia supernovae |
ISSN号 | 0004-637X |
DOI | 10.3847/1538-4357/abdeb9 |
产权排序 | 第8完成单位 |
文献子类 | Article |
英文摘要 | We present extensive, well-sampled optical and ultraviolet photometry and optical spectra of the Type Ia supernova (SN Ia) 2017hpa. The light curves indicate that SN 2017hpa is a normal SN Ia with an absolute peak magnitude of M-max(B) approximate to -19.12 +/- 0.11 mag and a postpeak decline rate Delta m(15)(B) = 1.02 +/- 0.07 mag. According to the quasi-bolometric light curve, we derive a peak luminosity of 1.25 x 10(43) erg s(-1) and a Ni-56 mass of 0.63 +/- 0.02M(circle dot). The spectral evolution of SN 2017hpa is similar to that of normal Ia supernovae (SNe Ia), while it exhibits an unusually rapid velocity evolution resembling that of SN 1991bg-like SNe Ia or the high-velocity subclass of SNe Ia, with a postpeak velocity gradient of similar to 130 +/- 7 km s(-1) day(-1). Moreover, its early spectra (t < - 7.9 days) show a prominent C II lambda 6580 absorption feature, which disappeared in near-maximum-light spectra but reemerged at phases from t similar to + 8.7 days to t similar to + 11.7 days after maximum light. This implies that some unburned carbon may mix deep into the inner layer and is supported by the low C II lambda 6580-to-Si II lambda 6355 velocity ratio (similar to 0.81) observed in SN 2017hpa. The O I lambda 7774 line shows a velocity distribution like that of carbon. The prominent carbon feature, the low velocity seen in carbon and oxygen, and the large velocity gradient make SN 2017hpa stand out from other normal SNe Ia and are more consistent with predictions from a violent merger of two white dwarfs. Detailed modeling is still needed to reveal the nature of SN 2017hpa. |
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 |
资助项目 | National Natural Science Foundation of China (NSFC)[11873081] ; National Natural Science Foundation of China (NSFC)[U2031209] ; National Natural Science Foundation of China (NSFC)[12033002] ; National Natural Science Foundation of China (NSFC)[11633002] ; National Natural Science Foundation of China (NSFC)[11761141001] ; National Program on Key Research and Development Project[2016YFA0400803] ; High Level Talent-Heaven Lake Program of Xinjiang Uygur Autonomous Region of China ; Scholar Program of Beijing Academy of Science and Technology[DZ:BS202002] ; Chinese Academy of Sciences ; People's Government of Yunnan Province ; National Natural Science Foundation of China[11773067] ; National Natural Science Foundation of China[11403096] ; Youth Innovation Promotion Association of the CAS[2018081] ; Ten Thousand Talents Program of Yunnan for Top-notch Young Talents ; TABASGO Foundation ; Christopher R. Redlich Fund ; Miller Institute for Basic Research in Science (U.C. Berkeley) ; NSF[AST-1911225] ; NASA's Astrophysics Data Analysis Program[NNX13AF35G] |
WOS关键词 | DELAYED-DETONATION MODELS ; HUBBLE-SPACE-TELESCOPE ; CIRCUMSTELLAR MATERIAL ; OPTICAL-SPECTRA ; LIGHT CURVES ; FACTORY OBSERVATIONS ; DATA RELEASE ; PROGRAM ; ULTRAVIOLET ; EXPLOSION |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP PUBLISHING LTD |
WOS记录号 | WOS:000629537600001 |
资助机构 | National Natural Science Foundation of China (NSFC)[11873081, U2031209, 12033002, 11633002, 11761141001] ; National Program on Key Research and Development Project[2016YFA0400803] ; High Level Talent-Heaven Lake Program of Xinjiang Uygur Autonomous Region of China ; Scholar Program of Beijing Academy of Science and Technology[DZ:BS202002] ; Chinese Academy of Sciences ; People's Government of Yunnan Province ; National Natural Science Foundation of China[11773067, 11403096] ; Youth Innovation Promotion Association of the CAS[2018081] ; Ten Thousand Talents Program of Yunnan for Top-notch Young Talents ; TABASGO Foundation ; Christopher R. Redlich Fund ; Miller Institute for Basic Research in Science (U.C. Berkeley) ; NSF[AST-1911225] ; NASA's Astrophysics Data Analysis Program[NNX13AF35G] |
内容类型 | 期刊论文 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/24261] |
专题 | 云南天文台_丽江天文观测站(南方基地) |
通讯作者 | Zeng, Xiangyun |
作者单位 | 1.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, People's Republic of China 2.Yunnan Observatories (YNAO), Chinese Academy of Sciences, Kunming 650216, People's Republic of China 3.Department of Astronomy, University of California, Berkeley, CA 94720-3411, USA 4.Department of Chemistry, University of Wisconsin, Madison, WI 53706, USA 5.Department of Physics, University of California, Santa Barbara, CA 93106-9530, USA 6.Department of Physics, University of California, Davis, CA 95616, USA 7.Beijing Planetarium, Beijing Academy of Science of Technology, Beijing 100044, People's Republic of China 8.Physics Department and Tsinghua Center for Astrophysics (THCA), Tsinghua University, Beijing, 100084, People's Republic of China 9.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China 10.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, People's Republic of China |
推荐引用方式 GB/T 7714 | Zeng, Xiangyun,Wang, Xiaofeng,Esamdin, Ali,et al. SN 2017hpa: A Nearby Carbon-rich Type Ia Supernova with a Large Velocity Gradient[J]. ASTROPHYSICAL JOURNAL,2021,909(2):19. |
APA | Zeng, Xiangyun.,Wang, Xiaofeng.,Esamdin, Ali.,Pellegrino, Craig.,Zheng, WeiKang.,...&Zhang, Tianmeng.(2021).SN 2017hpa: A Nearby Carbon-rich Type Ia Supernova with a Large Velocity Gradient.ASTROPHYSICAL JOURNAL,909(2),19. |
MLA | Zeng, Xiangyun,et al."SN 2017hpa: A Nearby Carbon-rich Type Ia Supernova with a Large Velocity Gradient".ASTROPHYSICAL JOURNAL 909.2(2021):19. |
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