2024/01/10 by Jia-Shu Niu, Niu, Jia-Shu, Hui-Fang Xue +1 · 1 citation
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Galaxies: Formation, Evolution, Phenomena #Scientific Research and Discoveries
paper · pdf · doi:10.48550/arxiv.2401.04931
In our galaxy, the white dwarfs (WDs) will inevitably capture the dark matter (DM) particles streaming through them, if there exist interactions between DM particles and nuclei/electrons. At the same time, these DM particles can also be evaporated by the nuclei/electrons in a WD if they have proper mass and the WD is not too cold. The evaporation of DM particles will lead to a faster cooling evolution than that predicted by the stellar evolution theory. In this work, we ascribe the faster cooling evolution of three observed WDs to the capture and evaporation of DM particles, and get the possible DM particle's mass and DM-electron cross section as follows: for F(q) = 1, 40 MeV/c2 \lesssim mχ \lesssim 70 MeV/c2 and 10-57 cm2 \lesssim σχ,e \lesssim 10-55 cm2; for F(q) = (αme)2/q2, 30 MeV/c2 \lesssim mχ \lesssim 60 MeV/c2 and 10-53 cm2 \lesssim σχ,e \lesssim 10-51 cm2. These results are beyond the detection capabilities of current direct detection experiments and should be cross checked by more novel scenarios in the future.