Kavli Affiliate: Mark Vogelsberger
| First 5 Authors: Giulia Despali, Lauro Moscardini, Dylan Nelson, Annalisa Pillepich, Volker Springel
| Summary:
We introduce the AIDA-TNG project, a suite of cosmological
magnetohydrodynamic simulations that simultaneously model galaxy formation and
different variations of the underlying dark matter model. We consider the
standard cold dark matter model and five variations, including three warm dark
matter scenarios and two self-interacting models with constant or
velocity-dependent cross-section. In each model, we simulate two cosmological
boxes of 51.7 and 110.7 Mpc on a side, with the same initial conditions as
TNG50 and TNG100, and combine the variations in the physics of dark matter with
the fiducial IllustrisTNG galaxy formation model. The AIDA-TNG runs are thus
ideal for studying the simultaneous effect of baryons and alternative dark
matter models on observable properties of galaxies and large-scale structures.
We resolve haloes in the range between $10^{8}$ and
$4times10^{14},$M$_{odot}$ and scales down to the nominal resolution of 570
pc in the highest resolution runs. This work presents the first results on
statistical quantities such as the halo mass function and the matter power
spectrum; we quantify the modification in the number of haloes and the power on
scales smaller than 1 Mpc, due to the combination of baryonic and dark matter
physics. Despite being calibrated on cold dark matter, we find that the TNG
galaxy formation model can produce a realistic galaxy population in all
scenarios. The stellar and gas mass fraction, stellar mass function, black hole
mass as a function of stellar mass and star formation rate density are very
similar in all dark matter models, with some deviations only in the most
extreme warm dark matter model. Finally, we also quantify changes in halo
structure due to warm and self-interacting dark matter, which appear in the
density profiles, concentration-mass relation and galaxy sizes.
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