论文标题
乳层外磁场对乳清外喀马射线发射的影响
Influence of extragalactic magnetic fields on extragalactic cascade gamma-ray emission
论文作者
论文摘要
我们讨论了乳层磁场对在电磁级联反应中产生的伽马射线发射强度的影响，该级别的脉络电磁层来自超高的能量宇宙射线，这些射线在播出外层次空间中传播。宇宙射线和级联颗粒都大多是出于星系，银河系簇和大规模结构而传播，因为它们的相对体积很小。因此，它们的磁场会微弱地影响级联产生的发射。然而，当应该知道喀马伽马射线背景的组成部分，包括级联伽玛射线发射时，对这种影响的估计值可能是有用的搜索暗物质颗粒。为了研究磁场对级联发射的影响，我们分析了〜10^（-6）和10^（-12）g的宇宙颗粒的传播（前者是典型的内部星系和簇，而后者在空隙，外部星系和簇中很常见）。在〜10^7-10^9 eV范围内，级联伽马射线发射的计算光谱相似。因此，分析在此范围内的级联发射，不必指定外层磁场模型。
We discuss the influence of extragalactic magnetic fields on the intensity of gamma-ray emission produced in electromagnetic cascades from ultra-high energy cosmic rays propagating in extragalactic space. Both cosmic rays and cascade particles propagate mostly out of galaxies, galactic clusters, and large scale structures as their relative volume is small. Therefore their magnetic fields weakly affect emission produced in cascades. Yet estimates of this influence can be useful searching for dark matter particles, when components of extragalactic gamma-ray background should be known, including cascade gamma-ray emission. To study magnetic field influence on cascade emission we analyze cosmic particle propagation in fields of ~10^(-6) and 10^(-12) G (the former is typical inside galaxies and clusters and the latter is common in voids and outside galaxies and clusters). The calculated spectra of cascade gamma-ray emission are similar in the range of ~10^7-10^9 eV. So analyzing cascade emission in this range it is not necessary to specify models of extragalactic magnetic field.
