Gas heating from spinning and non-spinning evaporating primordial black holes

Gas heating from spinning and non-spinning evaporating primordial black holes

Blog Article

Primordial black holes (PBHs) from the early Universe constitute a viable dark PS2 matter (DM) candidate and can span many orders of magnitude in mass.Light PBHs with masses around 1015 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 analyze gas heating from spinning evaporating PBHs.The resulting limits on Winter Sports - Snowshoes PBH DM abundance are found to be stronger for evaporating spinning PBHs than for non-spinning PBHs.