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arXiv 1109.2245astro-ph.HE
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质子-质子相互作用产生的超新星遗迹gamma-ray图像的性质

The properties of gamma-ray images of supernova remnants due to proton-proton interactions

V. Beshley, O. Petruk

摘要:

MAGIC和H.E.S.S实验是第一个在TeV伽马射线中产生超新星遗迹(SNR)图像的实验。伽马射线由电子(由于逆康普顿散射)或质子(由于π衰变)产生。我们提出了一种方法来合成由于强子发射的Sedov信噪比的γ射线图像。该模型是在一个经典的框架内开发的质子加速和流体动力学的冲击在一个均匀的星际介质,它包括相对论质子的能量损失,由于pp相互作用。我们的计算表明,这些损失是重要的,只有大密度的质子,因为它可能是在超新星激波与分子云的相互作用的情况下。数值模拟被用来合成强子TeV γ射线的径向轮廓。

英文摘要:

MAGIC and H.E.S.S experiments are the first to produce images of supernova remnats (SNRs) in TeV gamma-rays. The gamma-radiation are produced either by electrons (due to inverse-Compton scatterings) or protons (due to pion decays). We present a method to synthesize gamma-ray images of Sedov SNRs due to hadronic emission. The model is developed in the frame of a classic approach to proton acceleration and hydrodynamics of the shocks in a uniform interstellar medium; it includes energy losses of relativistic protons due to pp interactions. Our calculations show that these losses are important only for large densities of protons as it could be in case of interactions of the supernova shock with molecular cloud. Numerical simulations are used to synthesize radial profiles of hadronic TeV gamma-rays.

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