THE RADIO SOURCE POPULATION AT 15GHZ: IMPLICATIONS FOR CMB EXPERIMENTS
ANGELA C. TAYLOR
Cavendish Astrophysics, Cavendish Laboratory, Madingley Road,
Cambridge CB3 0HE, England


Abstract:
We present the preliminary results of a survey of radio sources in one of the Very Small Array (VSA) fields at 15 GHz. This is the highest radio frequency at which a survey has been done that is relevant to the issue of radio source contamination in CMB experiments. We find that the population of sources at 15GHz does not match that predicted by extrapolation from low frequency surveys, and that critically, 15 percent of the observed radio sources were not predicted. The rising spectra of many of the sources and the implications for CMB experiments at cm-wavelengths are discussed.