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arXiv 1502.03053astro-ph.HE
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天鹅座圈超新星遗迹的费米/LAT研究:点状源的发现及其gamma-ray发射的光谱差异

Fermi/LAT Study of the Cygnus Loop Supernova Remnant: Discovery of a Point-like Source and of Spectral Differences in its gamma-ray emission

I. Reichardt, R. Terrier, J. West, S. Safi-Harb, E. de Oña-Wilhelmi, J. Rico

摘要:

天鹅座环是附近的超新星遗迹(SNR),通过电磁波谱观测到。通过对6年的Fermi/LAT数据的分析,我们发现,以前的研究认为是一个单一的源,由一个扩展源加上一个点状源的SNR东南。扩展的伽马射线发射与SNR的热X射线发射很好地相关,并且能谱在$\sim0.6$ \,GeV处显示出明显的最大值。然而,在无线电辐射强烈而明显极化的区域,伽马射线谱没有显示出中断的迹象。因此,空间分辨伽马射线发射允许研究SNR和周围介质的不同相互作用条件。

英文摘要:

The Cygnus Loop is a nearby supernova remnant (SNR) observed across the electromagnetic spectrum. With the analysis of 6 years of Fermi/LAT data we find that, what previous studies had considered a single source, consists of an extended source plus a point-like source south-east of the SNR. The extended gamma-ray emission is well correlated with the thermal X-ray emission of the SNR, and the energy spectrum displays a pronounced maximum at $\sim0.6$\,GeV. However, in a region where the radio emission is strongly and distinctly polarized, the gamma-ray spectrum shows no sign of a break. Therefore, the spatially resolved gamma-ray emission permits the study of different interaction conditions of the SNR and the surrounding medium.

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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