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[6.21] A Study of the Brightest Radio Emitting X-ray Galaxies

F. E. Bauer, J. J. Condon (National Radio Astronomy Observatory), T. X. Thuan (University of Virginia)

We present the results from a complete sample of galaxies which are both radio sources in the 1.4 GHz NRAO VLA Sky Survey (NVSS) and X-ray sources above 0.1 cnt/s in the ROSAT All-Sky Survey Bright Source Catalog (BSC). This sample is unique in its size (N\approx1500 galaxies and quasars), composition (a mixture of nearly normal galaxies, Seyferts, quasars, and clusters), and low average distance ( \approx0.1). We have obtained redshifts and classifications for the majority of a magnitude-limited (J \leq 18 and \delta \ge -20\deg) subsample. The spectra permit us to estimate multivariate radio-X-ray-optical luminosity functions of these local galaxies and model evolutionary effects as a function of classification type. We use IRAS data (detections and upper limits) to determine the dominant energy source (AGN, stars and stellar remnants, or hot gas) in most cases. Using optical spectra, IRAS luminosities or limits, and high-resolution 4.5 & 8 GHz VLA data, we test orientation-dependent "unified" models involving relativistic beaming and absorption by nuclear dust torii.

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