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arXiv 0810.0035astro-ph
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由附近超新星遗迹的宇宙射线照射的分子云的非热辐射

Non-thermal radiation from molecular clouds illuminated by cosmic rays from nearby supernova remnants

Stefano Gabici, Sabrina Casanova, Felix A. Aharonian

摘要:

由于宇宙射线在稠密的磁化气体中的相互作用,分子云预计会发出非热辐射。如果云靠近宇宙射线的加速器,并且如果宇宙射线可以离开加速器并扩散到达云,则这种发射被放大。我们考虑的情况下,分子云是位于附近的超新星遗迹,这是加速宇宙射线,并逐步释放到星际介质。我们计算的多波长光谱从无线电到伽马射线出现的云作为宇宙射线相互作用的结果。总能量输出由伽马射线发射主导,其可以超过来自其他带的发射一个数量级或更多。这表明,迄今为止探测到的一些未识别的TeV源,在其他波长上没有明显或非常弱的对应物,可能与来自附近源的宇宙射线照射的云有关。

英文摘要:

Molecular clouds are expected to emit non-thermal radiation due to cosmic ray interactions in the dense magnetized gas. Such emission is amplified if a cloud is located close to an accelerator of cosmic rays and if cosmic rays can leave the accelerator and diffusively reach the cloud. We consider the situation in which a molecular cloud is located in the proximity of a supernova remnant which is accelerating cosmic rays and gradually releasing them into the interstellar medium. We calculate the multiwavelength spectrum from radio to gamma rays which emerges from the cloud as the result of cosmic ray interactions. The total energy output is dominated by the gamma ray emission, which can exceed the emission from other bands by an order of magnitude or more. This suggests that some of the unidentified TeV sources detected so far, with no obvious or very weak counterpart in other wavelengths, might be associated with clouds illuminated by cosmic rays coming from a nearby source.

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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