http://arxiv.org/abs/1909.07395
We use a high performance fully GPU $N$-body code with adaptive time steps to show that dark matter candidates in the form of primordial black holes can induce a cusp-to-core transition in low-mass dwarf galaxies via dynamical friction by dark matter particles at 1 M${\odot}$ mass resolution acting on primordial black holes in the mass range 25 – 100 M${\odot}.$ This mechanism requires a lower limit on the primordial black hole mass fraction of 1$\%$ of the total dwarf galaxy dark matter content. The transition time-scale is between 1 and 8 Gyr and depends on the mass, the mass fraction and the scale radius of the initial density profile of the primordial black hole distribution.
P. Boldrini, Y. Miki, A. Wagner, et. al.
Wed, 18 Sep 19
53/64
Comments: 7 pages, 6 figures, submitted to MNRAS
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