标题： 轴子夸克团暗物质的光辉：(III) 银河系紫外背景之谜 显示英文标题

标题： The Glow of Axion Quark Nugget Dark Matter: (III) The Mysteries of the Milky Way UV Background

摘要： 轴子夸克核（AQNs）是假设存在的具有核密度的天体物理对象，它们可能在夸克-强子相变期间形成，并且可能是当今暗物质的主要组成部分。 这些对象的质量大于几克，尺寸小于微米。 它们还将有助于解释物质-反物质不对称性以及宇宙中可见部分和暗部分之间的相似性，即$\Omega_{\text{DM}} \sim \Omega_{\text{visible}}$。 这些复合对象表现为冷暗物质，与普通物质相互作用并产生广泛的电磁辐射。 本研究旨在计算太阳系周围 1 千秒差距区域内，由于反物质 AQNs 与重子相互作用产生的远紫外（FUV）电磁信号。 为此，我们使用了银河系的高分辨率流体动力学模拟，即 FIRE-2 Latter 套件，以选择类似太阳系的区域。 从这些区域模拟的气体和暗物质分布中，我们计算了由 AQN 模型生成的 FUV 背景辐射。 我们发现结果与新地平线号探测器上的 Alice 光谱仪最近确认的 FUV 过剩一致，这证实了十年前 GALEX 首次发现的 FUV 过剩。 我们还讨论了本工作的潜在宇宙学意义，表明星系中存在一种新的 FUV 辐射源，与暗物质和重子之间的相互作用相关。 显示英文摘要

摘要： Axion quark nuggets (AQNs) are hypothetical objects with nuclear density that would have formed during the quark-hadron transition and could make up most of the dark matter today. These objects have a mass greater than a few grams and are sub-micrometer in size. They would also help explain the matter-antimatter asymmetry and the similarity between visible and dark components of the universe, i.e. $\Omega_{\text{DM}} \sim \Omega_{\text{visible}}$. These composite objects behave as cold dark matter, interacting with ordinary matter and producing pervasive electromagnetic radiation. This work aims to calculate the FUV electromagnetic signature in a 1 kpc region surrounding the solar system, resulting from the interaction between antimatter AQNs and baryons. To this end, we use the high-resolution hydrodynamic simulation of the Milky Way, FIRE-2 Latter suite, to select solar system-like regions. From the simulated gas and dark matter distributions in these regions, we calculate the FUV background radiation generated by the AQN model. We find that the results are consistent with the FUV excess recently confirmed by the Alice spectrograph aboard New Horizons, which corroborated the FUV excess initially discovered by GALEX a decade ago. We also discuss the potential cosmological implications of our work, which suggest the existence of a new source of FUV radiation in galaxies, linked to the interaction between dark matter and baryons.