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arXiv 1807.06369astro-ph.HEastro-ph.GAastro-ph.SR
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SN 2018牛的X射线Swift观测

X-ray Swift observations of SN 2018cow

L. E. Rivera Sandoval, T. J. Maccarone, A. Corsi, P. J. Brown, D. Pooley, J. C. Wheeler

摘要:

超新星(SN)2018cow(或AT 2018cow)是在CGCG 137 - 068星系中发现的一个光学瞬变。由于其光谱中的各种特征,它已被归类为SN。瞬变也是明亮的X射线源。本文分析了尼尔·盖尔斯·斯威夫特天文台在27天内对~62 ks的X射线观测结果。我们发现SN 2018牛的0.3 - 10 keV X射线光变曲线具有可变行为,变异时间尺度为天。观测到的X射线变化可能是由于SN喷出物和非均匀的星周介质之间的相互作用,可能与以前的发光蓝色可变类祖物质喷出物有关。

英文摘要:

Supernova (SN) 2018cow (or AT2018cow) is an optical transient detected in the galaxy CGCG 137-068. It has been classified as a SN due to various characteristics in its optical spectra. The transient is also a bright X-ray source. We present results of the analysis of ~62ks of X-ray observations taken with the Neil Gehrels Swift Observatory over 27 days. We found a variable behavior in the 0.3-10 keV X-ray light curve of SN 2018cow, with variability timescales of days. The observed X-ray variability could be due to the interaction between the SN ejecta and a non-uniform circumstellar medium, perhaps related to previous mass ejections from a luminous-blue-variable-like progenitor.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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