Constraints on Feedback in the local Universe: The relation between star
  formation and AGN activity in early type galaxies
  We address the relation between star formation and AGN activity in a sample
of 231 nearby ($0.0002<z<0.0358$) early type galaxies by carrying out a
multi-wavelength study using archival observations in the UV, IR and radio. Our
results indicate that early type galaxies in the current epoch are rarely
powerful AGNs, with $P<10^{22}\,WHz^{-1}$ for a majority of the galaxies. Only
massive galaxies are capable of hosting powerful radio sources while less
massive galaxies are hosts to lower radio power sources. Evidence of ongoing
star formation is seen in approximately 7% of the sample. The SFR of these
galaxies is less than 0.1 $M_{\odot}yr^{-1}$. They also tend to be radio faint
($P<10^{22}\,WHz^{-1}$). There is a nearly equal fraction of star forming
galaxies in radio faint ($P<10^{22}\,WHz^{-1}$) and radio bright galaxies
($P\geq10^{22}\,WHz^{-1}$) suggesting that both star formation and radio mode
feedback are constrained to be very low in our sample. We notice that our
galaxy sample and the Brightest Cluster Galaxies (BCGs) follow similar trends
in radio power versus SFR. This may be produced if both radio power and SFR are
related to stellar mass.
