1. The absorbing haloes around high-redshift radio galaxies: the UVES view
- Author
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Wilman, R.J., Jarvis, M.J., Röttgering, H.J.A., and Binette, L.
- Subjects
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RADIO galaxies , *RADIO sources (Astronomy) , *GALAXIES , *ASTRONOMY , *SPECTRUM analysis - Abstract
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 hasN(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 withN(HI)≃4×1014 cm−2, one of which has strong CIV absorption, implying a metallicity ofZ≃10 Z◎. 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. [Copyright &y& Elsevier]- Published
- 2003
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