The absorbers towards Q0836+113

Details The absorbers towards Q0836+113 The absorbers towards Q0836+113

1996-10-18

arxiv.org/abs/astro-ph/9610141v1

Astronomy and Astrophysics

Astrophysics

6 pages, 6 figures, aatex. Accepted for publication in Astronomy & Astrophysics

Scientific paper

We have performed RIJHK_S imaging of the field around the z=2.67 quasar Q0836+113, which presents several metal line and a damped Ly\alpha absorption systems in its spectrum. The images reveal the existence of a red K_S=18.9 object \approx 11 arcsec from the quasar. On the basis of the empirical relationships between absorption radius and luminosity we conclude that this object may be the CIV absorber at z=1.82. This could be the first detection of a high redshift galaxy causing high-ionisation absorption. After carefully subtracting the QSO, we do not detect, up to a 3\sigma limiting magnitude for extended objects of K_S=20.8, the damped Ly\alpha absorber apparently detected as a Ly\alpha emitter at z=2.47. It is also suggested, that object ``SW'' from Wolfe et al. (1992) could be the galaxy responsible for the claimed MgII absorption at z=0.37.

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