论文标题
暗物质an灭对伽马射线的贡献在大型星系中心附近的余星
Contribution of dark matter annihilation to gamma-ray burst afterglows near massive galaxy centers
论文作者
论文摘要
据信，伽马射线爆发（GRB）是由超级喷气式飞机提供动力的。如果这些喷气机会遇到并加速由粒子暗物质（DM）歼灭产生的过量电子和正电子，则观察到的电磁辐射将得到增强。在本文中，我们研究了GRB余辉发射，并在弱相互作用的巨大颗粒歼灭条件下存在丰富的DM。我们计算具有不同参数的GRB次源的光曲线和光谱，即DM密度，粒子DM质量，歼灭通道和星际介质的电子密度。我们发现，如果CircuMburst具有低电子密度（$ n \ sillsim 0.1〜 \ rm cm^{ - 3} $），并且如果DM具有较高的数字密度（$ρ__\ gtrsim 10^3〜3〜3〜 \ rm Gev〜cm gy〜cmm^cm^cm）根据标准的Galaxy DM密度曲线，具有DM贡献的GRB余潮可能在距离大型星系中心几十到数十帕斯克的距离处发生。
Gamma-ray bursts (GRBs) are believed to be powered by ultrarelativistic jets. If these jets encounter and accelerate excess electrons and positrons produced by particle dark matter (DM) annihilation, the observed electromagnetic radiation would be enhanced. In this paper, we study GRB afterglow emission with the presence of abundant DM under the weakly interacting massive particle annihilation conditions. We calculate the light curves and spectra of the GRB afterglows with different parameters, i.e., DM density, particle DM mass, annihilation channel, and electron density of the interstellar medium. We find that the effect of DM may become noticeable in the afterglow spectra if the circumburst has a low electron number density ($n \lesssim 0.1~\rm cm^{-3}$) and if the DM has a high number density ($ρ_χ\gtrsim 10^3~\rm GeV~cm^{-3}$). According to the standard galaxy DM density profile, GRB afterglows with DM contribution might occur at distances of several to tens of parsecs from the centers of massive galaxies.
