A model for a dark matter core at the galactic center

Abstract

We consider a toy model for the supermassive compact object at the galactic center that does not require the presence of a black hole. We assume a matter distribution of weakly interacting particles with a density profile inferred from dark matter profiles in the outer regions. We show that rotation curves close to the center of the Milky Way galaxy can be explained within this model. We also show that the motion of test particles (stars) at distances of the order of 100 astronomical units can not be distinguished from the motion of corresponding particles in the Schwarzschild geometry. However, differences arise at shorter distances, suggesting that it could be possible to observationally test the validity of the model in the near future.

9 pages, 9 figures

References in corpus (6)

• The mass distribution and gravitational potential of the Milky Way
• Event-horizon-scale structure in the supermassive black hole candidate at the Galactic Centre
• How to tell a gravastar from a black hole
• Evidence for dark matter in the inner Milky Way
• Gravastar Shadows
• Giant HI Hole inside the 3-kpc Ring and the North Polar Spur - The Galactic Crater -

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• Effects of non-vanishing dark matter pressure in the Milky Way galaxy
• Viscous Dark Energy Accretion Activities : Sonic Speed, Angular Momentum and Mach Number Studies
• Luminosity of accretion disks in compact objects with quadrupole