THE STELLAR-TO-HALO MASS RELATION OF LOCAL GALAXIES SEGREGATES BY COLOR

• Published in: The Astrophysical journal Vol. 799; no. 2; pp. 1 - 21
• Main Authors: Rodriguez-Puebla, Aldo, Avila-Reese, Vladimir, Yang, Xiaohu, Foucaud, Sebastien, Drory, Niv, Jing, Y P
• Format: Journal Article
• Language: English
• Published: United States 01-02-2015
• Subjects: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COLOR; COMPARATIVE EVALUATIONS; CORRELATION FUNCTIONS; GALACTIC EVOLUTION; Galactic halos; Galaxies; LUMINOSITY; MASS; MILKY WAY; NONLUMINOUS MATTER; Occupation; Quenching; SATELLITES; STAR EVOLUTION; STARS; STATISTICS; Stellar mass
• ISSN: 1538-4357; 0004-637X; 1538-4357
• DOI: 10.1088/0004-637X/799/2/130

By means of a statistical approach that combines different semi-empirical methods of galaxy-halo connection, we derive the stellar-to-halo mass relations (SHMR) of local blue and red central galaxies. We also constrain the fraction of halos hosting blue/red central galaxies and the occupation statistics of blue and red satellites as a function of halo mass, M[subh]. For the observational input we use the blue and red central/satellite galaxy stellar mass functions and two-point correlation functions in the stellar mass range of 9 < log(M[sub *]/M) < 12. Our results suggest that the SHMR of central galaxies at large masses is shaped by mass quenching. At low masses processes that delay star formation without invoking too strong supernova-driven outflows could explain the high M[sub *]-to-M[subh] ratios of blue centrals as compared to those of the scarce red centrals.