MAGIC group and galaxy catalogs

Most of the new redshifts have apparent magnitudes in the z++ band z++_app>21.5. The spectroscopic redshift completeness is high: in the redshift range of [OII] emitters (0.25<z<1.5), where most of the groups are found, it globally reaches a maximum of 80% down to z++_app_=25.9, and it locally decreases from ~100% to ~50% in magnitude bins from z++_app_=23-24 to z++_app_=25.5. We find that the fraction of quiescent galaxies increases with local density and with the time spent in groups.

A morphological dichotomy is also found between bulge-dominated quiescent and disk-dominated star-forming galaxies. As environment gets denser, the peak of the stellar mass distribution shifts towards M*>10^10^M_{sun}_, the fraction of galaxies with M*<10^9^M_{sun}_ decreasing significantly, even for star-forming galaxies. We also highlight peculiar features such as close groups, extended nebulae, and a gravitational arc.

Our results suggest that galaxies are pre- processed in groups of increasing mass before entering rich groups and clusters. We publicly release two catalogs containing the properties of galaxies and groups, respectively.