The Environment Dependence of the Green Valley

COENDA, V, MARTÍNEZ, H. J. & MURIEL, H.

Congreso; XV Latin American Regional IAU Meeting Cartagena 2016; 2016

To shed light on the impact of internal and external quenching mechanisms upon galaxies, in this paper we compare properties of star forming, passive and transition galaxies in three discrete environments: field, groups as representative of intermediate mass systems, and the most massive virialised systems in theUniverse, X-ray clusters. We classify galaxies into three sequences: passive (PS), green valley (GV) and star forming (SFS), by meansof their UV-optical colour. We study a number of galaxy properties: UV-optical colour, stellar mass, morphology, specific star formation rate and the history of star formation.