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arXiv 1909.04744astro-ph.HE
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SNR 1 E 0102.2-7219中子星的X射线光谱分析

X-ray spectral analysis of the neutron star in SNR 1E 0102.2-7219

Pavan R. Hebbar, Craig O. Heinke, Wynn C. G. Ho

摘要:

我们重新分析了小麦哲伦星云中明亮超新星遗迹(SNR)1 E 0102.2-7219的许多存档钱德拉X射线观测,以验证Vogt等人(2018)在SNR中检测到中子星(NS)。这种光谱分析需要仔细注意背景。我们发现,一个黑体+幂律模型是一个不错的拟合,暗示了一个相对较强的B场和同步辐射,在一个正常的年轻脉冲星,虽然热光度会异常高的年轻脉冲星。在现实的NS大气模型中,B = 10^12 G的碳大气最适合观测到的X射线光谱。将它异常高的热光度(L_{bol} = 1.1^{+1.6}_{-0.5}*10^34尔格/s)与其他超新星进行比较,我们发现它的光度可以用最初强磁场(如磁星或高B场双星)的衰减或超新星爆炸后较慢的冷却来解释。这个SNR中NS的性质(以及麦哲伦云中的其他物质)可以通过X射线望远镜很好地证实,该望远镜具有像钱德拉一样的角分辨率,但具有更高的光谱分辨率和有效面积,如Lynx概念。

英文摘要:

We re-analysed numerous archival Chandra X-ray observations of the bright supernova remnant (SNR) 1E 0102.2-7219 in the Small Magellanic Cloud, to validate the detection of a neutron star (NS) in the SNR by Vogt et al. (2018). Careful attention to the background is necessary for this spectral analysis. We find that a blackbody + power-law model is a decent fit, suggestive of a relatively strong B field and synchrotron radiation, as in a normal young pulsar, though the thermal luminosity would be unusually high for young pulsars. Among realistic NS atmosphere models, a carbon atmosphere with B = 10^12 G best fits the observed X-ray spectra. Comparing its unusually high thermal luminosity (L_{bol} = 1.1^{+1.6}_{-0.5}*10^34 ergs/s) to other NSs, we find that its luminosity can be explained by the decay of an initially strong magnetic field (as in magnetars or high B-field pulsars) or by slower cooling after the supernova explosion. The nature of the NS in this SNR (and of others in the Magellanic Clouds) could be nicely confirmed by an X-ray telescope with an angular resolution like Chandra, but superior spectral resolution and effective area, such as the Lynx concept.

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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