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arXiv 0811.1383astro-ph
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微类星体中中微子产生的磁场效应

Magnetic field effects on neutrino production in microquasars

Matías M. Reynoso, Gustavo E. Romero

摘要:

研究了微类星体中磁场对中微子产生的影响。我们计算了在喷流中p-γ和p-p相互作用中产生的π介子和μ介子的稳定粒子分布,考虑了所有能量损失的影响。由于次级π介子和μ介子的同步辐射损失,所获得的中微子发射被显著地修改。对到达地球的中微子通量的估计意味着,从致密物体附近探测高能中微子可能是困难的。然而,在有风的微类星体的情况下,喷流中的高能质子与风的密集团块物质的相互作用可以产生可检测的中微子。这是因为距离致密天体较远的π介子和μ介子不会受到同步加速器损耗的影响。

英文摘要:

We investigate the effects of magnetic fields on neutrino production in microquasars. We calculate the steady particle distributions for the pions and muons generated in p-gamma and p-p interactions in the jet taking the effects of all energy losses into account. The obtained neutrino emission is significantly modified due to the synchrotron losses suffered by secondary pions and muons. The estimates made for neutrino fluxes arriving on the Earth imply that detection of high-energy neutrinos from the vicinity of the compact object can be difficult. However, in the case of windy microquasars, the interaction of energetic protons in the jet with matter of dense clumps of the wind could produce detectable neutrinos. This is because the pions and muons at larger distances from the compact object will not be affected by synchrotron losses.

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