SN 2017egm和特殊瞬态AT 2018cow的光度观测

IF 0.4 4区物理与天体物理 Q4 ASTRONOMY & ASTROPHYSICS Contributions of the Astronomical Observatory Skalnate Pleso Pub Date : 2022-04-01 DOI:10.31577/caosp.2022.52.1.46

D. Tsvetkov, I. Volkov, S. Shugarov, V. Metlov, N. N. Pavlyuk, O. Vozyakova, N. Shatsky

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引用次数: 2

摘要

。我们在NGC3191中观测到了超新星SN 2017egm的57个光度期，观测周期为285天;在NGC3191中观测到了特殊天体AT 2018cow的36个光度期，观测周期为69天。在5个地点使用7台望远镜进行UBV RI测光，其中包括位于Sternberg天文研究所高加索山天文台的2.5 m望远镜。将SN 2017egm的光和色曲线与几个被充分研究过的类似类型的天体进行了比较。SN 2017egm的光曲线表现出明确的波动:在相位超过最大值的第114天出现了一个肩部，而一个平台期持续了155-235天。我们确定了SN 2017egm和AT 2018cow的光曲线的基本参数:最大光的日期和亮度，不同波段不同演化阶段的衰减率。

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Photometric observations of SN 2017egm and peculiar transient AT 2018cow

. We present 57 photometric epochs of superluminous SN 2017egm in NGC3191, covering the period of 285 days, and 36 epochs of peculiar object AT 2018cow, for which observations lasted 69 days. UBV RI photometry was carried out with 7 telescopes at 5 locations, including the 2.5-m telescope at the Caucasus Mountain Observatory of the Sternberg Astronomical Institute. The light and color curves of SN 2017egm were compared to several well-studied objects of similar type. The light curves of SN 2017egm show deﬁnite undulations: a shoulder at phase 114 days past maximum and a plateau lasting for a phase interval 155–235 days. We determined the basic parameters of the light curves for SN 2017egm and AT 2018cow: dates and magnitudes of maximum light, rates of decline at diﬀerent stages of evolution in diﬀerent bands.

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来源期刊

Contributions of the Astronomical Observatory Skalnate Pleso 地学天文-天文与天体物理

CiteScore

1.10

自引率

20.00%

发文量

审稿时长

>12 weeks

期刊介绍： Contributions of the Astronomical Observatory Skalnate Pleso" (CAOSP) is published by the Astronomical Institute of the Slovak Academy of Sciences (SAS). The journal publishes new results of astronomical and astrophysical research, preferentially covering the fields of Interplanetary Matter, Stellar Astrophysics and Solar Physics. We publish regular papers, expert comments and review contributions.