The TOOT00 Redshift Survey of Radio Sources

Details The TOOT00 Redshift Survey of Radio Sources The TOOT00 Redshift Survey of Radio Sources

2005-09-16

arxiv.org/abs/astro-ph/0509491v1

Astronomy and Astrophysics

Astrophysics

4 pages, 5 figures, to be published in AN (proceedings of the Granada Workshop on High Redshift Radio Galaxies)

Scientific paper

10.1002/asna.200510524

We present first results from the study of the TOOT00 region consisting of 47 radio sources brighter than 100 mJy at 151 MHz. We have 81% spectroscopic redshift completeness. From the K-z diagram we deduce that the host galaxies are similar to ~3 L* passively evolved elliptical galaxies and thus estimate the redshifts of the 9 sources without a secure spectroscopic redshift yielding a median redshift of 1.287. Above the RLF break we have a quasar fraction f ~ 0.3 although the quasars appear reddened; below the RLF break f -> 0 if we exclude flat-spectrum radio sources. We present a histogram of the number of TOOT00 radio sources versus their redshift which looks broadly like the Willott et al. (2001) prediction for TOOT, although the observed ratio of high to low redshift objects is somewhat lower than the prediction.

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