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The TOOT00 redshift survey of radio sources
Author(s) -
Vardoulaki E.,
Rawlings S.,
Hill G. J.,
Croft S.,
Brand K.,
Riley J.,
Willott C.
Publication year - 2006
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.200510524
Subject(s) - redshift , physics , astrophysics , quasar , redshift survey , galaxy , radio galaxy , astronomy
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 q ∼ 0.3 although the quasars appear reddened; below the RLF break f q →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. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)