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arXiv 1509.08548astro-ph.HEhep-ph
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超新星遗迹CTB 37 B方向的GeV源

A GeV source in the direction of Supernova Remnant CTB 37B

Yu-Liang Xin, Yun-Feng Liang, Xiang Li, Qiang Yuan, Si-Ming Liu, Da-Ming Wei

摘要:

超新星遗迹是银河系宇宙射线最有吸引力的加速场候选者。我们报告了费米大面积望远镜(Fermi-LAT)在壳型SNR CTB 37 B附近记录的8次事件中探测到GeV $γ$射线发射,该壳型SNR CTB 37 B可能与TeV $γ-$射线源HESS J1713-381有关。在$0.5-500$ GeV能量范围内,CTB 37 B的光子谱符合指数为$1.89\pm0.08$的幂律,在几百GeV能量范围内,测量的通量与HESS J1713-381的通量平滑连接.没有发现明显的空间延伸和时间变化。多波长数据可以很好地拟合轻子模型或强子模型。然而,这两个模型的参数表明更有效的粒子加速比典型的SNR。同时,CTB 37 B的X射线和$γ$射线光谱特性表明,它是一个有趣的源,桥接了以非热发射为主的年轻SNR和与分子云相互作用的老SNR。

英文摘要:

Supernova remnants (SNRs) are the most attractive candidates for the acceleration sites of Galactic cosmic rays. We report the detection of GeV $γ$-ray emission with the Pass 8 events recorded by Fermi Large Area Telescope (Fermi-LAT) in the vicinity of the shell type SNR CTB 37B that is likely associated with the TeV $γ-$ray source HESS J1713-381. The photon spectrum of CTB 37B is consistent with a power-law with an index of $1.89\pm0.08$ in the energy range of $0.5-500$ GeV, and the measured flux connects smoothly with that of HESS J1713-381 at a few hundred GeV. No significant spatial extension and time variation are detected. The multi-wavelength data can be well fitted with either a leptonic model or a hadronic one. However, parameters of both models suggest more efficient particle acceleration than typical SNRs. Meanwhile, the X-ray and $γ$-ray spectral properties of CTB 37B show that it is an interesting source bridging young SNRs dominated by non-thermal emission and old SNRs interacting with molecular clouds.

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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