The mass of radio galaxies from low to high redshift

Details The mass of radio galaxies from low to high redshift The mass of radio galaxies from low to high redshift

2001-12-14

arxiv.org/abs/astro-ph/0112341v1

Astronomy and Astrophysics

Astrophysics

6 pages, 3 figures. To appear in ESO conference "The mass of galaxies from low to high redshift", Venice Oct 24-26, 2001

Scientific paper

Using a new radio sample, 6C* designed to find radio galaxies at z > 4 along with the complete 3CRR and 6CE sample we extend the radio galaxy K-z relation to z~4.5. The 6C* K-z data significantly improve delineation of the K-z relation for radio galaxies at high redshift (z >2). In a spatially flat universe with a cosmological constant (Omega_M=0.3 and Omega_Lambda=0.7), the most luminous radio sources appear to be associated with galaxies with a luminosity distribution with a high mean (~5L*), and a low dispersion (~0.5 mag) which formed their stars at epochs corresponding to z >~ 2.5.

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