论文标题
旋转和非旋转蒸发原始黑洞的气体加热
Gas Heating from Spinning and Non-Spinning Evaporating Primordial Black Holes
论文作者
论文摘要
早期宇宙的原始黑洞（PBH）构成了一个可行的暗物质（DM）候选者，可以跨越质量的许多数量级。质量约为$ 10^{15} $ g的轻质PBH有助于DM，并将通过霍金（Hawking）辐射有效蒸发，从而导致一系列可观察的签名。发射将在周围的星际介质中沉积能量和热量。我们通过蒸发非旋转PBH来重新审视矮星系加热的限制，并发现来自狮子座矮星系的保守限制比以前建议的明显弱。此外，我们分析了从蒸发PBHS旋转的气体加热。发现PBH DM丰度的最终极限对于蒸发旋转PBH的限制比非旋转PBH更强。
Primordial black holes (PBHs) from the early Universe constitute a viable dark matter (DM) candidate and can span many orders of magnitude in mass. Light PBHs with masses around $10^{15}$ g contribute to DM and will efficiently evaporate through Hawking radiation at present time, leading to a slew of observable signatures. The emission will deposit energy and heat in the surrounding interstellar medium. We revisit the constraints from dwarf galaxy heating by evaporating non-spinning PBHs and find that conservative constraints from Leo T dwarf galaxy are significantly weaker than previously suggested. Furthermore, we analyse gas heating from spinning evaporating PBHs. The resulting limits on PBH DM abundance are found to be stronger for evaporating spinning PBHs than for non-spinning PBHs.
