We present an analysis of the galaxy stellar mass function in different environments at intermediate redshift ( 0.3 \leq z \leq 0.8 ) for two mass-limited galaxy samples .
We use the IMACS Cluster Building Survey ( ICBS ; M _ { \ast } \geq 10 ^ { 10.5 } M _ { \odot } ) to study cluster , group and field galaxies at z = 0.3 – 0.45 , and the ESO Distant Cluster Survey ( EDisCS ; M _ { \ast } \geq 10 ^ { 10.2 } M _ { \odot } ) to investigate cluster and group galaxies at z = 0.4 – 0.8 .
Our analysis thus includes galaxies with masses reaching just below that of the Milky Way .
Excluding the brightest cluster galaxies , we show that the shape of the mass distribution does not seem to depend on global environment , Our two main results are : ( 1 ) Galaxies in the virialised regions of clusters , in groups , and in the field follow similar mass distributions .
( 2 ) Comparing the ICBS and EDisCS mass functions to mass functions in the local universe , we detect evolution from z \sim 0.4 – 0.6 to z \sim 0.07 in the sense that the population of low-mass galaxies has grown with time with respect to the population of massive galaxies .
This evolution is independent of environment , i.e. , the same for clusters and the field .
Furthermore , considering only cluster galaxies , we find that no differences can be detected in their mass functions either within the virialised regions , or when we compare galaxies inside and outside the virial radius .
Finally , we find that red and blue galaxies have different mass functions .
However , the shapes of the mass functions of blue and red galaxies do not seem to depend on their environment ( clusters groups and the field ) .