DM4 - Self Gravitating Systems and Dark Matter |
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Speaker |
Argüelles, Carlos R. |
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Coauthors |
Argüelles, Carlos R.; Krut, Andreas; Rueda, Jorge A.; Ruffini, R. |
| Talk Title |
Novel constraints on fermionic dark matter from galactic observables |
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Abstract |
We have recently introduced a new model for the distribution of dark matter in galaxies, the Ruffini-Argüelles- Rueda (RAR) model, based on a self-gravitating system of massive fermions at fi nite temperatures. The RAR model, for fermion masses above keV, successfully describes the DM halos in galaxies, and predicts the existence of a denser quantum core towards the centre of each con figuration. We demonstrate here, for the first time, that the introduction of a cutoff in the fermion phase-space distribution, necessary to account for the fi nite Galaxy size, defi nes a new solution with a compact quantum core which represents an alternative to the central BH scenario for SgrA*. For a fermion mass in the range 48 keV < m < 345 keV, the DM halo distribution agrees with the Milky Way rotation curve data, while harbors a dense quantum core of 4x10^6 Mo within the S2 star pericentre. In particular, for a fermion mass of m ~ 50 keV the model is able to explain the DM halos from typical dwarf to elliptical galaxies, while harboring massive dark compact objects from 10^3 Mo up to 10^8 Mo at their respective centres. |
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