We have proposed a formation scenario for dSph galaxies which does not include any interaction with other galaxies, called the Dissolving Star Cluster Model. In this model the gas, accumulating inside the dark matter halo of the dwarf gañaxu. forms stars in form of small star clusters and associations which orbit the central region of the dark matter halo. These small entities do not survive for long and spread their stars along their trajectories, thereby forming the luminous component of the dSph galaxy as we see today. As the very faint and ultra-faint dSph galaxies have a very low stellar content, we have modified our scenario and start with a fractal distribution of stars in the centre of the DM halo. We obtain objects resembling the observed faint dSph galaxies and we find interesting correlations between the DM and the stellar distribution.
14/01/2025
Speaker: Michael Fellhauer (University of Concepcion, Chile)
Sala Lauree, Tuesday 14th, at 15:15