# Can fermionic dark matter mimic supermassive black holes?

## TL;DR

This paper proposes a model where fermionic dark matter forms dense cores that can mimic supermassive black holes and explain galactic dynamics, unifying dark matter halo and central compact object within a single framework.

## Contribution

It introduces a unified fermionic dark matter model that accounts for both galactic halos and central supermassive objects, aligning with observational data.

## Key findings

- Dense fermion cores can mimic supermassive black holes.
- Model explains stellar dynamics around Milky Way's center.
- Compatible with observed galaxy rotation curves.

## Abstract

We analyze the intriguing possibility to explain both dark mass components in a galaxy: the dark matter (DM) halo and the supermassive dark compact object lying at the center, by a unified approach in terms of a quasi-relaxed system of massive, neutral fermions in general relativity. The solutions to the mass distribution of such a model that fulfill realistic halo boundary conditions inferred from observations, develop a highly-density core supported by the fermion degeneracy pressure able to mimic massive black holes at the center of galaxies. Remarkably, these dense core-diluted halo configurations can explain the dynamics of the closest stars around Milky Way's center (SgrA*) all the way to the halo rotation curve, without spoiling the baryonic bulge-disk components, for a narrow particle mass range $mc^2 \sim 10$-$10^2$~keV.