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arXiv 2108.09536astro-ph.HE
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几十年前超新星的X射线亮度

X-ray Luminosity of Decades-Old Supernovae

Vandana Ramakrishnan, Vikram V. Dwarkadas

摘要:

从超新星(SNe)到超新星遗迹(SNRs)的转变仍然知之甚少,因为两者之间的年龄差距已经得到了很好的研究。为了弥合这一差距,我们分析了钱德拉天文台在X射线中探测到的一些最古老的超新星的档案数据,以便将它们的光变曲线延长到晚期。我们用热模型拟合了光谱。发现具有多个X射线数据点的所有SNe具有相似的X射线光度,其随时间而降低。当SNe在风介质中演化时,X射线光度可能会继续降低,但当SNe与恒定密度的星际介质相互作用时,预计在Sedov阶段会增加,使其与观测到的SNR一致。

英文摘要:

The transition from supernovae (SNe) to supernova remnants (SNRs) remains poorly understood, given the age gap between well-studied examples of the two. In order to bridge this gap, we analysed archival Chandra data for some of the oldest supernovae detected in X-rays, in order to extend their light curves out to late times. We fitted the spectra with thermal models. All the SNe with multiple X-ray data points were found to have similar X-ray luminosity, which was decreasing with time. The X-ray luminosity will likely continue to decrease while the SNe are evolving in a wind medium, but is anticipated to increase in the Sedov phase when the SNe are interacting with a constant density interstellar medium, bringing it in line with observed SNRs.

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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