Comunicazione
Constraining physical processes in local star-forming galaxies using CAMELS cosmological simulations.
Busillo V., Tortora C.
I will analyze the structural properties and dark matter content of local star-forming galaxies in the mass range $[10^9, 10^{11}]M_{\odot}$, by comparing the CAMELS cosmological simulations to the observed scaling relations from the SPARC sample. The relations considered are the correlations of size, internal dark matter fraction, internal dark matter mass and total mass with total stellar mass. I will explain how these relations can be used to constrain cosmological and astrophysical parameters, by searching for the combination which minimizes the $\chi^2$ evaluated with respect to the observations. For the IllustrisTNG suite, we find results consistent within $1\sigma$ with the nine-year WMAP observations. Results for the supernovae feedback parameters indicate that simulations with lower outflow wind energy per unit SFR better reproduce the observations. AGN feedback parameter variations show negligible effects on the trends within the mass range considered. For the SIMBA suite, simulations predict large central dark matter mass, with trends reconciliable with observations only by using parameter values which are inconsistent with most observational constraints.