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We analyze a (120 h^{-1} Mpc)^3 adaptive mesh refinement hydrodynamicsimulation that contains a higher-resolution 31 x 31 x 35 h^{-3} Mpc subvolumecentered on a ~30 Mpc diameter void. Our detailed ~1 kpc resolution allows usto identify 1300 galaxies within this void to a limiting halo mass of ~10^{10}M_sun. Nearly 1000 galaxies are found to be in underdense regions, with 300galaxies residing in regions less than half the mean density of the simulationvolume. We construct mock observations of the stellar and gas properties ofthese systems, and reproduce the range of colors and luminosities observed inthe SDSS for nearby (z < 0.03) galaxies. We find no trends with density for themost luminous (M_r < -18) galaxies, however our dwarf void galaxies (M_r >-16), though they are less reliably resolved, typically appear bluer, withhigher rates of star formation and specific star formation and lower meanstellar ages than galaxies in average density environments. We find asignificant population of low luminosity (M_r ~ -14) dwarf galaxies that ispreferentially located in low density regions and specifically in the voidcenter. This population may help to reduce, but not remove, the discrepancybetween the predicted and observed number of void galaxies.

Simulated void galaxies in the standard cold dark matter model