Oral comunication
J. Brinchmann
Abstract
We will present the first results from MUSE-Faint, a 100 hr MUSE GTO survey of ultra-faint dwarf galaxies around the Milky Way with the aim to understand better the early formation of these faint sources and to constrain the nature of dark matter. The focus in this talk is on Eridanus 2 which has a putative stellar cluster. Since ultra-faint dwarfs are strongly dark matter dominated, the surivial of this cluster can be used to constrain the abundance of MAssive Compact Halo Objects to dark matter. Using the unique capabilities MUSE we are able to, for the first time, demonstrate that the cluster is indeed real and place new and more robust constraints on the contribution of MACHOs to dark matter (Zoutendijk et al, submitted). We also show that if MACHOs make up a large fraction of dark matter they must have masses less than ~10 Msun.
XXIX Encontro Nacional de Estudantes de Astronomia
Lisboa, Portugal
2019 September
