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- W3013604805 abstract "We study the core mass -- halo mass relation of bosonic dark matter halos, in the form of self-gravitating Bose-Einstein condensates, harbouring a supermassive black hole. We use the ``velocity dispersion tracing'' relation according to which the velocity dispersion in the core $v_c^2sim GM_c/R_c$ is of the same order as the velocity dispersion in the halo $v_h^2sim GM_h/r_h$ (this relation can be justified from thermodynamical arguments) and the approximate analytical mass-radius relation of the quantum core in the presence of a central black hole obtained in our previous paper [P.H. Chavanis, Eur. Phys. J. Plus 134, 352 (2019)]. For a given minimum halo mass $(M_h)_{rm min}sim 10^8, M_{odot}$ determined by the observations, the only free parameter of our model is the scattering length $a_s$ of the bosons (their mass $m$ is then determined by the characteristics of the minimum halo). For noninteracting bosons and for bosons with a repulsive self-interaction, we find that the core mass $M_c$ increases with the halo mass $M_h$ and achieves a maximum value $(M_c)_{rm max}$ at some halo mass $(M_h)_{*}$ before decreasing. The whole series of equilibria is stable. For bosons with an attractive self-interaction, we find that the core mass achieves a maximum value $(M_c)_{rm max}$ at some halo mass $(M_h)_{*}$ before decreasing. The series of equilibria becomes unstable above a maximum halo mass $(M_h)_{rm max}ge (M_h)_{*}$. In the absence of black hole $(M_h)_{rm max}=(M_h)_{*}$. At that point, the quantum core (similar to a dilute axion star) collapses. We perform a similar study for fermionic dark matter halos. We find that they behave similarly to bosonic dark matter halos with a repulsive self-interaction, the Pauli principle for fermions playing the role of the repulsive self-interaction for bosons." @default.
- W3013604805 created "2020-04-03" @default.
- W3013604805 creator A5007478460 @default.
- W3013604805 date "2020-03-26" @default.
- W3013604805 modified "2023-09-30" @default.
- W3013604805 title "Core mass-halo mass relation of bosonic and fermionic dark matter halos harboring a supermassive black hole" @default.
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- W3013604805 doi "https://doi.org/10.1103/physrevd.101.063532" @default.
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