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SN 2017hpa: A Nearby Carbon-rich Type Ia Supernova with a Large Velocity Gradient

文献类型：期刊论文

作者Zeng, Xiangyun1,2; Wang, Xiaofeng3,4,5; Esamdin, Ali1; Pellegrino, Craig6,7; Zheng, WeiKang8; Zhang, Jujia9,10,11; Mo, Jun3,4; Li, Wenxiong3,4,12; Howell, D. Andrew6,7; Filippenko, Alexei V.8,13
刊名ASTROPHYSICAL JOURNAL
出版日期2021-03-01
卷号909期号:2页码:176
ISSN号0004-637X
关键词Supernovae Type Ia supernovae
DOI10.3847/1538-4357/abdeb9
产权排序1
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.
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WOS关键词DELAYED-DETONATION MODELS ; HUBBLE-SPACE-TELESCOPE ; CIRCUMSTELLAR MATERIAL ; OPTICAL-SPECTRA ; LIGHT CURVES ; FACTORY OBSERVATIONS ; DATA RELEASE ; PROGRAM ; ULTRAVIOLET ; EXPLOSION
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) ; National Program on Key Research and Development Project ; High Level Talent-Heaven Lake Program of Xinjiang Uygur Autonomous Region of China ; Scholar Program of Beijing Academy of Science and Technology ; Chinese Academy of Sciences ; People's Government of Yunnan Province ; National Natural Science Foundation of China ; Youth Innovation Promotion Association of the CAS ; 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 ; NASA's Astrophysics Data Analysis Program
源URL[http://ir.xao.ac.cn/handle/45760611-7/3967]  
专题新疆天文台_光学天文与技术应用研究室
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.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
3.Tsinghua Univ, Phys Dept, Beijing 100084, Peoples R China
4.Tsinghua Univ, Tsinghua Ctr Astrophys THCA, Beijing 100084, Peoples R China
5.Beijing Acad Sci Technol, Beijing Planetarium, Beijing 100044, Peoples R China
6.Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA
7.Las Cumbres Observ, 6740 Cortona Dr,Suite 102, Goleta, CA 93117 USA
8.Univ Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 USA
9.Chinese Acad Sci, Yunnan Observ YNAO, Kunming 650216, Yunnan, Peoples R China
10.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650216, Yunnan, Peoples R 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):176.
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),176.
MLA Zeng, Xiangyun,et al."SN 2017hpa: A Nearby Carbon-rich Type Ia Supernova with a Large Velocity Gradient".ASTROPHYSICAL JOURNAL 909.2(2021):176.

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来源：新疆天文台

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