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EA: Dark-matter-deficient galaxies in the Illustris-TNG simulations – Tau
April 21, 2022 @ 10:00 am - 10:15 am
In the standard model of galaxy formation, galaxies form within a halo of dark matter, which is the component that dominates the matter budget of the Universe. Surprisingly, some recent observations have discovered a few galaxies that lack dark matter and that would therefore be dominated by baryonic matter. Dark matter deficient galaxies (DMDGs) could have lost their dark matter halos due to interactions during their evolution; in particular, during their fusion history. In this work, we study the population of dark matter deficient galaxies at different redshifts using the hydrodynamical simulation IllustrisTNG, which follows the evolution of dark matter and baryonic matter. We analyse the dark matter fraction of these galaxies considering their total mass and also within their central regions. We also analyse the evolution of their baryonic and dark matter components tracing them through time, as the satellite orbits its host halo in order to determine if the loss of the dark matter is due to the tidal stripping that could be taking place.