Gas metallicities and early evolution of distant radiogalaxies

Details Gas metallicities and early evolution of distant radiogalaxies Gas metallicities and early evolution of distant radiogalaxies

2000-08-04

arxiv.org/abs/astro-ph/0008085v1

Astrophys.Space Sci. 277 (2001) 571-574

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure. To appear in proceedings of the Euroconference: ''The Evolution of Galaxies. I - Observational Clues'' ed.

Scientific paper

By modeling the rich emission line spectra of a sample of high redshift (HzRG, z\sim 2.5) radio galaxies we find that solar and supersolar metallicities are common in the extended gas of these objects. Our models and the comparison with high redshift quasars suggest that HzRG at z\sim 2.5 are associated with intense star formation activity. This is consistent with chemical evolution models for giant ellipticals and it supports the idea that distant powerful radio galaxies are progenitors of giant ellipticals. We might be witnessing different evolutive status in different objects.

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