INFRARED SURFACE PHOTOMETRY OF 3C 65 - STELLAR EVOLUTION AND THE TOLMAN SIGNAL

We present an analysis of the infrared surface brightness profile of t he high-redshift radio galaxy 3C 65 (z = 1.176), which is well fitted by a de Vaucouleurs r1/4 law. A model surface fitting routine yields c haracteristic photometric parameters comparable to those of low-redshi ft radio galaxies and brighest cluster members (BCMs) in standard cosm ologies. The small displacement of this galaxy from the locus of low-r edshift systems on the mu(r)-log r(e) plane suggests that little or no luminosity evolution is required in a cosmological model with [OMEGA0 , lambda0) = [1, 0], while a modest degree of luminosity evolution, ac countable by passive evolution of the stellar population, is implied i n models with [0, 0] or [0.1, 0.9]. A nonexpanding cosmology is unlike ly because it would require 3C 65 to lie at the extreme end of the dis tribution of properties of local gE galaxies, and the effects of plaus ible stellar and/or dynamic evolution would make 3C 65 even more extre me by the present epoch.