The radio Butcher-Oemler effect

Details The radio Butcher-Oemler effect The radio Butcher-Oemler effect

Nov 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999phdt........22m&link_type=abstract

Thesis (PhD). THE UNIVERSITY OF NEW MEXICO, Source DAI-B 61/01, p. 314, Jul 2000, 324 pages.

Computer Science

15

Scientific paper

The purpose of this study is to investigate the population of low-luminosity radio galaxies within very- rich clusters of galaxies, from the dense cores out to low density regions 2.5 Mpc from the cluster centers and over a significant redshift interval ( 0.02<~z<~0.41 ). Based on the local radio luminosity function and the far-infrared (FIR) radio correlation, many low-luminosity radio galaxies have their radio emission powered by synchrotron radiation resulting from ongoing star-formation. Thus we can use radio observations to select probable starbursting galaxies. To answer these questions, we have conducted a VLA 20 cm radio continuum survey of 36 very-rich clusters with 0.02 <= z <= 0.41, down to a constant radio luminosity limit of 2 × 1022 W Hz-1. We found that the population of radio-selected galaxies in distant rich z ~ 0.4 clusters with luminosities between 1022.3 W Hz-1 <= L1.4 <= 10 22.75 W Hz-1 is higher by a factor of >=5 compared to nearby rich clusters. An interesting discovery was made in the `E+A' population of the distant rich cluster C10939+4713. (Abstract shortened by UMI.)

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