  We report on a preliminary study concerning the origin of radio emission
within radio galaxies at L(1.4GHz)>1E24 W/Hz in the GOODS-N field. In the local
universe, Condon et al. (2002) and Yun et al. (2001) have shown that in
galaxies with radio luminosities greater than 1E23 W/Hz the majority of the
radio emission originates from a `monster' i.e., an AGN. Using the Chandra
2Msec X-ray image centered on the GOODS-N field and a reprocessed VLA HDF
A-array data plus newly acquired VLA B-array data (rms=5.3microJy), we find
that radio galaxies (with spectroscopic redshifts; all have z>1) with
L(1.4GHz)>1E24 W/Hz typically have an X-ray detection rate of 72% (60% emit
hard X-rays suggesting an AGN origin for the radio emission) in contrast to 25%
for radio galaxies with L < 1E23 W/Hz. The ACS images of these L(1.4 GHz) >
1E24 W/Hz galaxies typically show compact rather than extended galaxy
morphology which is generally found for the less luminous radio emitting
galaxies but a few appear to be ongoing galaxy mergers. We also present SED
fitting for these luminous radio galaxies including Spitzer IRAC & MIPS 24um
photometry and 60% show distinct power-law SED indicative of an AGN. Initial
results tell us that the X-ray emitting radio galaxy population are generally
not submm sources but the few (~10%) that are SCUBA sources appear to be the
small AGN population found by Pope et al. and others.
