Properties of simulated galaxies and supermassive black holes in cosmic voids

• DOI: 10.1093/mnras/staa219
• Publication Date: 2020-02-05T20:10:24Z
• Authors: Mélanie Habouzit; Alice Pisani; Andy Goulding; Yohan Dubois; Rachel S Somerville; Jenny E Greene
• Keywords: Void (composites); Stellar mass

Cosmic voids, the under-dense regions of cosmic web, are widely used to constrain cosmology. Voids contain few, isolated galaxies, presumably expected be less evolved and preserving memory pristine Universe. We use cosmological hydrodynamical simulation Horizon-AGN coupled void finder {\sc \texttt{VIDE}} investigate properties galaxies in voids at z=0. find that, closer centers, low-mass more common than their massive counterparts. At fixed dark matter halo mass, they have smaller stellar masses denser regions. The star formation rate diminishes when approaching but sSFR slightly increases, suggesting that form stars efficiently with respect mass. this can not only attributed prevalence galaxies. inner region also predominantly host BHs. However, BH mass galaxy ratios resemble those whole Our results suggest even if growth channels different environments, grow BHs a similar way. While large fraction low Eddington ratios, we 20\% could observed as AGN log10 L=41.5-42.5 erg/s hard X-ray (2-10 keV). These pave way future work larger next-generation hydro simulations, aiming confirm our findings prepare application on data from upcoming surveys such PFS, Euclid WFIRST.