论文标题
模糊的$ pp $ - 通道中微子来源
Obscured $pp$-channel neutrino sources
论文作者
论文摘要
我们探讨了天体中性中微子是在$ pp $互相的情况下与源云附近的气云一起产生的可能性的，该气体充当光束垃圾场，这足以通过对这种气体的成对产生来显着减弱相关的伽马射线磁通量。这样，这种来源可以潜在地提供天体中微子的通量，同时避免对非巨大贡献对外层次伽玛射线背景的非巨大贡献的现有限制。定义模型后，我们实施了蒙特卡洛模拟，并将其应用于不同的情况。首先，我们研究了一组活跃的星系，这些星系表现出模糊的迹象。我们发现，目前，我们模型中这些对象的预期中微子通量低于现有的排除限制，但已经可以限制此类来源中加速的质子的量。其次，我们研究了由一系列模糊来源产生的弥漫性中微子通量。我们发现，这样的人口确实可以减轻伴随背景灯光的张力。我们讨论了超光红外星系代表这样的来源类别的可能性。
We explore the possibility that the astrophysical neutrinos are produced in $pp$-interactions with a gas cloud near the source acting as a beam dump, which is sufficiently dense to significantly attenuate the associated gamma-ray flux through pair-production on this gas. In this way, such sources could potentially supply the astrophysical neutrino flux whilst avoiding the existing constraints on the non-blazar contribution to the extragalactic gamma-ray background. After defining our model, we implement a Monte Carlo simulation and apply this to different scenarios. First, we investigate a set of active galaxies which exhibit signs of obscuration. We find that, currently, the expected neutrino flux from these objects in our model is below the existing exclusion limits, but can already constrain the amount of protons accelerated in such sources. Second, we investigate the diffuse neutrino flux generated by a population of obscured sources. We find that such a population can indeed alleviate the tension with the extragalactic background light. We discuss the possibility that ultra-luminous infrared galaxies represent such a source class.
