Effects of environment on sSFR profiles of late-type galaxies in the
  CALIFA survey
  We explore the effects of environment on star formation in late-type galaxies
by studying the dependence of the radial profiles of specific star formation
rate (sSFR) on environment and the stellar mass, using a sample of 275
late-type galaxies drawn from the CALIFA survey. We consider three different
discrete environments: field galaxies, galaxies in pairs, and galaxies in
groups, with stellar masses $9\le \log(M_{\star}/M_{\odot}) \le 12$, and
compare their sSFR profiles across the environments. Our results suggest that
the stellar mass is the main factor determining the sSFR profiles of late-type
galaxies; the influence of AGNs and bars are secondary. We find that the
relative size of the bulge plays a key role in depressing star formation
towards the center of late-type galaxies. The group environment determines
clear differences in the sSFR profiles of galaxies. We find evidence of an
outside-in action upon galaxies with stellar masses $9\le
\log(M_{\star}/M_{\odot}) \le 10$ in groups. We find a much stronger
suppression of star formation in the inner regions of massive galaxies in
groups, which may be an indication of a different merger history.
