The absorbing haloes around high-redshift radio galaxies: the UVES view

Details The absorbing haloes around high-redshift radio galaxies: the UVES view The absorbing haloes around high-redshift radio galaxies: the UVES view

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003newar..47..279w&link_type=abstract

New Astronomy Reviews, Volume 47, Issue 4-5, p. 279-283.

Astronomy and Astrophysics

Astronomy

4

Scientific paper

We summarise the properties of the absorbing haloes around two high-redshift radio galaxies studied with the VLT-UVES echelle spectrograph. The absorbers in 0943-242 (/z=2.92) exhibit little further structure compared with previous data-the main absorber still has N(HI)~=1019 cm-2-reinforcing the picture in which the absorbing gas occupies a smooth shell beyond the emission line halo. In 0200+015 (/z=2.23) the main absorber now splits into two spatially-resolved systems with N(HI)~=4×1014 cm-2, one of which has strong CIV absorption, implying a metallicity of /Z~=10 Zsolar. We explain the differences between the two sources with an evolutionary scenario, invoking interaction with the expanding radio source and metal enrichment via a starburst superwind.

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