The GOODS-North Radio Galaxies: On the Origin of the Radio Emission

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dc.creatorMorrison, G.
dc.creatorDickinson, M.
dc.creatorOwen, F.
dc.creatorDaddi, E.
dc.creatorChary, R.
dc.creatorBauer, F.
dc.creatorMobasher, B.
dc.creatorMacDonald, E.
dc.creatorKoekemoer, A.
dc.creatorPope, A.
dc.date2006-03-16
dc.date.accessioned2026-07-07T07:01:09Z
dc.date.available2026-07-07T07:01:09Z
dc.descriptionWe 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.
dc.descriptionThe Spitzer Science Center 2005 Conference Proceedings: 4 pages & 4 figures
dc.identifierhttps://arxiv.org/abs/astro-ph/0603412
dc.identifierhttp://arxiv.org/abs/astro-ph/0603412
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/108190
dc.subjectAstrophysics
dc.titleThe GOODS-North Radio Galaxies: On the Origin of the Radio Emission
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