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arXiv 1010.2185astro-ph.HE
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星暴星系脉冲星风星云的γ射线

Gamma-rays from pulsar wind nebulae in starburst galaxies

Karl Mannheim, Dominik Elsässer, Omar Tibolla

摘要:

最近,已经从星爆星系NGC253探测到TeV能量的伽马射线发射(Acero等人,2009)和M82(Acciari等人,2009.有人声称,观测到的伽马射线是由超新星遗迹中加速的宇宙射线与星际气体相互作用产生的。在这里,我们表明,伽玛射线脉冲星风星云留下的超新星有助于TeV的光度在一个主要的方式。一个脉冲星风星云在10^5年的寿命中,在能量超过1 TeV时,产生的总光度约为太阳的10倍。在一个典型的星暴星系中,在4百万秒差距的距离上,大量的3 × 10^4脉冲星风星云很容易产生观测到的TeV伽马射线。

英文摘要:

Recently, gamma-ray emission at TeV energies has been detected from the starburst galaxies NGC253 (Acero et al., 2009) and M82 (Acciari et al., 2009. It has been claimed that pion production due to cosmic rays accelerated in supernova remnants interacting with the interstellar gas is responsible for the observed gamma rays. Here, we show that the gamma-ray pulsar wind nebulae left behind by the supernovae contribute to the TeV luminosity in a major way. A single pulsar wind nebula produces about ten times the total luminosity of the Sun at energies above 1 TeV during a lifetime of 10^5 years. A large number of 3x10^4 pulsar wind nebulae expected in a typical starburst galaxy at a distance of 4 Mpc can readily produce the observed TeV gamma rays.

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