SN 2015bq: A Luminous Type Ia Supernova with Early Flux Excess | |
Li LP(李丽萍)1,5; Zhang JJ(张居甲)1,2; Dai, Benzhong5; Li, Wenxiong3; Wang, Xiaofeng4; Zhai Q(翟倩)1,2; Bai JM(白金明)1,2 | |
刊名 | ASTROPHYSICAL JOURNAL |
2022 | |
卷号 | 924期号:1 |
ISSN号 | 0004-637X |
DOI | 10.3847/1538-4357/ac323f |
产权排序 | 第2完成单位 |
文献子类 | Article |
英文摘要 | We present optical and ultraviolet (UV) observations of a luminous type Ia supernova (SN Ia) SN 2015bq characterized by early flux excess. This SN reaches a B-band absolute magnitude at M-B = -19.68 +/- 0.41 mag and a peak bolometric luminosity at L = (1.75 +/- 0.37) x 10(43) erg s(-1), with a relatively small post-maximum decline rate [Delta m(15)(B) = 0.82 +/- 0.05 mag]. The flux excess observed in the light curves of SN 2015bq a few days after the explosion, especially seen in the UV bands, might be due to the radioactive decay of Ni-56 mixed into the surface. The radiation from the decay of the surface Ni-56 heats the outer layer of this SN. It produces blue U - B color followed by monotonically reddening in the early phase, dominated iron-group lines, and weak intermediate-mass element absorption features in the early spectra. The scenario of enhanced Ni-56 in the surface is consistent with a large amount of Ni-56 (M-56Ni = 0.97 +/- 0.20 M-circle dot) synthesized during the explosion. The properties of SN 2015bq are found to locate between SN 1991T and SN 1999aa, suggesting the latter two subclasses of SNe Ia may have a common origin. |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星形成与演化 |
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)National Natural Science Foundation of China (NSFC)[11773067] ; National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC)[12173082] ; National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC)[11403096] ; National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC)[12033003] ; National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC)[11761141001] ; Youth Innovation Promotion Association of the CAS[2018081] ; Ten Thousand Talents Program of Yunnan for Top-notch Young Talents ; Major State Basic Research Development ProgramNational Basic Research Program of China[2016YFA0400803] ; Scholar Program of Beijing Academy of Science and Technology[DZ:BS202002] ; National key research and development program[2018YFA0404204] ; Science Foundation of Yunnan Province[2018FA004] ; China Manned Space Project[CMS-CSST-2021-A13] |
WOS关键词 | HIGH-VELOCITY FEATURES ; LIGHT CURVES ; SPECTROSCOPIC OBSERVATIONS ; HUBBLE CONSTANT ; EXPLOSION ; MAXIMUM ; SPECTRA ; MODELS ; PROGENITORS ; CONSTRAINTS |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP Publishing Ltd |
WOS记录号 | WOS:000740830500001 |
资助机构 | National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC)[11773067, 12173082, 11403096, 12033003, 11761141001] ; Youth Innovation Promotion Association of the CAS[2018081] ; Ten Thousand Talents Program of Yunnan for Top-notch Young Talents ; Major State Basic Research Development ProgramNational Basic Research Program of China[2016YFA0400803] ; Scholar Program of Beijing Academy of Science and Technology[DZ:BS202002] ; National key research and development program[2018YFA0404204] ; Science Foundation of Yunnan Province[2018FA004] ; China Manned Space Project[CMS-CSST-2021-A13] |
内容类型 | 期刊论文 |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/24782] |
专题 | 云南天文台_丽江天文观测站(南方基地) |
通讯作者 | Zhang JJ(张居甲) |
作者单位 | 1.Yunnan Observatories (YNAO), Chinese Academy of Sciences, Kunming 650216, People's Republic of China; jujia@ynao.ac.cn.; 2.Key Laboratory for the Structure and Evolution of Celestial Objects,CAS, Kunming, 650216, People's Republic of China; 3.The School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel; 4.Physics Department and Tsinghua Center for Astrophysics (THCA), Tsinghua University, Beijing, 100084, People's Republic of China 5.School of Physics and Astronomy, Yunnan University, Kunming 650091, People's Republic of China; |
推荐引用方式 GB/T 7714 | Li LP,Zhang JJ,Dai, Benzhong,et al. SN 2015bq: A Luminous Type Ia Supernova with Early Flux Excess[J]. ASTROPHYSICAL JOURNAL,2022,924(1). |
APA | Li LP.,Zhang JJ.,Dai, Benzhong.,Li, Wenxiong.,Wang, Xiaofeng.,...&Bai JM.(2022).SN 2015bq: A Luminous Type Ia Supernova with Early Flux Excess.ASTROPHYSICAL JOURNAL,924(1). |
MLA | Li LP,et al."SN 2015bq: A Luminous Type Ia Supernova with Early Flux Excess".ASTROPHYSICAL JOURNAL 924.1(2022). |
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