We investigate the dependance of galaxy sizes and star-formation rates ( SFRs ) on environment using a mass-limited sample of quiescent and star-forming galaxies with log ( M _ { * } /M _ { \odot } ) \geq 9.5 at \bar { z } = 0.92 selected from the NMBS survey .
Using the GEEC2 spectroscopic cluster catalog and the accurate photometric redshifts from NMBS , we select quiescent and star-forming cluster ( \bar { \sigma } = 490 km s ^ { -1 } ) galaxies within two virial radius , R _ { vir } , intervals of 2 \textgreater R _ { vir } \textgreater 0.5 and R _ { vir } \textless 0.5 .
Galaxies residing outside of 2 R _ { vir } of both the cluster centres and additional candidate over-densities are defined as our field sample .
Galaxy structural parameters are measured from the COSMOS legacy HST /ACS F814W image .
The sizes and Sérsic indices of quiescent field and cluster galaxies have the same distribution regardless of R _ { vir } .
However , cluster star-forming galaxies within 0.5 R _ { vir } have lower mass - normalised average sizes , by 16 \pm { 7 } \% , and a higher fraction of Sérsic indices with n \textgreater 1 , than field star-forming galaxies .
The average SFRs of star-forming cluster galaxies show a trend of decreasing SFR with clustocentric radius .
The mass - normalised average SFR of cluster star-forming galaxies is a factor of 2 - 2.5 ( 7 - 9 \sigma ) lower than that of star-forming galaxies in the field .
While we find no significant dependence on environment for quiescent galaxies , the properties of star-forming galaxies are affected , which could be the result of environment acting on their gas content .