Speaker
Pol Mollitor
(L)
Description
We study three high resolution cosmological hydrodynamical
simulations of Milky Way-sized halos
including a comparison with the corresponding DM-only runs performed with the
adaptive mesh refinement code RAMSES. We analyse the stellar and gas distribution and find one of our simulated galaxies with interesting Milky Way like features with regard to several observational tests.
Thanks to consistently tuned star formation rate and supernovae
feedback, we manage to obtain an extended disk and a flat rotation
curve with the circular velocity and the dark matter density in the solar
neighbourhood in agreement with observations. With a
careful look at the derivation of the stellar-to-halo mass ratio, we
also obtain competitive values for this criterion.
Concerning the dark matter distribution, we explicitly
show the interaction with the baryons and show how the dark matter is
first contracted by star formation and then cored by feedback
processes. Analysing the clump spectrum, we find a shift in mass with
regard to DM-only run and obtain a high mass satellite
distribution comparable with the Milky Way spheroidal dwarf galaxies.
This work will be very soon on arxiv.
In this consistent framework, we may also comment on dark matter detection phenomenology which will be the subject of subsequent papers.
Primary author
Pol Mollitor
(L)
Co-authors
Emmanuel Nezri
(CNRS)
Prof.
Romain Teyssier
(Institute for Theoretical Physics, University of Zurich)
