标题： 来自大尺度结构形成和温热星系际介质的伽马射线：基于伽马射线的宇宙重子测定 显示英文标题

标题： Gamma-Rays from Large Scale Structure Formation and the Warm-Hot Intergalactic Medium: Cosmic Baryometry with Gamma-Rays

摘要： 结果显示，电子在大尺度结构形成冲击波中加速产生的逆康普顿伽马射线可能会受到非引力效应（如辐射冷却和星系形成）的严重影响，在伽马射线源计数或星系际背景贡献上带来数量级的不确定性。 然而，这也意味着此类伽马射线在未来可能为我们提供关于宇宙重子成分比例的有价值信息，特别是关于温热-高热星系际介质的信息，据信宇宙中的大多数重子都存在于这一介质中。 我们通过半解析建模的方法来解决这个问题，该方法自洽地处理了合并冲击波和吸积冲击波。 显示英文摘要

摘要： It is shown that inverse Compton gamma-rays from electrons accelerated in large scale structure formation shocks can be crucially affected by non-gravitational effects such as radiative cooling and galaxy formation, with corresponding uncertainties by an order of magnitude in either the gamma-ray source counts or the extragalactic background contribution. However, this also implies that such gamma-rays may in the near future provide us with valuable information about the fraction of cosmic baryons in different forms, particularly the warm-hot intergalactic medium where the majority of the baryons in the universe are believed to reside. We address this problem in a simple way through semi-analytic modeling of structure formation shocks which self-consistently treats merger and accretion shocks.