论文标题
探测与边缘21厘米信号的暗物质相互作用的深色能量和散射
Probing Interacting Dark Energy and Scattering of Baryons with Dark Matter in Light of EDGES 21cm Signal
论文作者
论文摘要
边缘实验观察到了亮度温度的过量槽（$ -500^{+200} _ { - 500} $ mk），来自宇宙dawn时代的中性氢原子（HI）的21厘米吸收系的21厘米吸收系（$ z \ simeq 17.2 $）。我们考虑了暗物质和暗能量流体的可能相互作用，以及Baryon物质与暗物质的冷却，以解释观察到的$ T_ {21} $的多余槽。我们利用三种不同的暗物质 - 漆黑能量（DM-DE）相互作用模型来品尝这些模型在解释边缘结果时的生存能力。哈勃参数的演变通过DM-DE交互修改，这在这项工作中也解决了。反过来，这影响了HI 21cm的光学深度以及Baryon温度，从而影响$ T_ {21} $亮度温度。此外，我们还发现，DM-DE相互作用使我们能够在满足边缘结果方面探索不同的质量制度及其生存能力的暗物质。
The EDGES experiment has observed an excess trough ($-500^{+200}_{-500}$ mK) in the brightness temperature $T_{21}$ of the 21cm absorption line of neutral Hydrogen atom (HI) from the era of cosmic dawn ($z \simeq 17.2$). We consider possible interaction of Dark Matter and Dark Energy fluid along with the cooling off of the baryon matter by its collision with Dark Matter to explain the observed excess trough of $T_{21}$. We make use of three different Dark Matter-Dark Energy (DM-DE) interaction models to taste the viability of those models in explaining the EDGES results. The evolution of Hubble parameter is modified by DM-DE interactions and this is also addressed in this work. This in turn influences the optical depth of HI 21cm as well as the baryon temperature and thus effects the $T_{21}$ brightness temperature. In addition we also find that the DM-DE interaction enables us to explore Dark Matter with varied mass regimes and their viabilities in terms of satisfying the EDGES result.
