@article{6a62462c9e114d8fb8c0fbaa082e5730,
title = "The edge of galaxy formation III: The effects of warm dark matter on Milky Way satellites and field dwarfs",
abstract = "In this third paper of the series, we investigate the effects of warm dark matter (WDM) with a particle mass of mWDM = 3 keV on the smallest galaxies in our Universe. We present a sample of 21 hydrodynamical cosmological simulations of dwarf galaxies and 20 simulations of satellite-host galaxy interaction that we performed both in a cold dark matter (CDM) and WDM scenario. In the WDM simulations, we observe a higher critical mass for the onset of star formation. Structure growth is delayed in WDM, as a result WDM haloes have a stellar population on average 2 Gyr younger than their CDM counterparts. Nevertheless, despite this delayed star formation, CDM and WDM galaxies are both able to reproduce the observed scaling relations for velocity dispersion, stellar mass, size, and metallicity at z = 0. WDM satellite haloes in a Milky Way mass host are more susceptible to tidal stripping due to their lower concentrations, but their galaxies can even survive longer than the CDM counterparts if they live in a dark matter halo with a stee per central slope. In agreement with our previous CDM satellite study we observe a steepening of the WDM satellites' central dark matter density slope due to stripping. The difference in the average stellar age for satellite galaxies, between CDM and WDM, could be used in the future for disentangling these two models.",
keywords = "Cosmology: theory, Dark matter, Galaxies: formation, Galaxies: kinematics and dynamics, Methods: numerical",
author = "Macci{\`o}, {Andrea V.} and Jonas Frings and Tobias Buck and Dutton, {Aaron A.} and Marvin Blank and Aura Obreja and Dixon, {Keri L.}",
note = "Funding Information: The authors gratefully acknowledge the Gauss Centre for Supercomputing e.V. (www.gauss-centre.eu) for funding this project by providing computing time on the GCS Supercomputer SuperMUC at Leibniz Supercomputing Centre (http://www.lrz.de) and the High Performance Computing resources at New York University Abu Dhabi. Part of this research was also carried out on the THEO cluster of the Max-Planck-Institut f{\"u}r Astronomie and on the HYDRA clusters at the Rechenzentrum in Garching. TB and AVM acknowledge funding from the Deutsche Forschungsgemeinschaft via the SFB 881 program {\textquoteleft}The Milky Way System{\textquoteright} (subproject A1 and A2). JF and AVM acknowledge funding and support through the graduate college Astrophysics of cosmological probes of gravity by Landesgraduiertenakademie Baden-W{\"u}rttemberg. JF and TB are members of the International Max-Planck Research School in Heidelberg. AO acknowledges support from the German Science Foundation (DFG) grant 1507011 847150-0. Funding Information: The authors gratefully acknowledge the Gauss Centre for Supercomputing e.V. (www.gauss-centre.eu) for funding this project by providing computing time on the GCS Supercomputer SuperMUC at Leibniz Supercomputing Centre (http://www.lrz.de) and the High Performance Computing resources at New York University Abu Dhabi. Part of this research was also carried out on the THEO cluster of the Max-Planck-Institut f{\"u}r Astronomie and on the HYDRA clusters at the Rechenzentrum in Garching. TB and AVM acknowledge funding from the Deutsche Forschungsgemeinschaft via the SFB 881 program 'The Milky Way System' (subproject A1 and A2). JF and AVM acknowledge funding and support through the graduate college Astrophysics of cosmological probes of gravity by Landesgraduiertenakademie Baden-W{\"u}rttemberg. JF and TB are members of the International Max-Planck Research School in Heidelberg. AO acknowledges support from the German Science Foundation (DFG) grant 1507011 847150-0. Publisher Copyright: {\textcopyright} 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society",
year = "2019",
month = apr,
day = "21",
doi = "10.1093/mnras/stz327",
language = "English (US)",
volume = "484",
pages = "5400--5408",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "4",
}