Masaq Index
arXiv 1996-10-18 0 views

The absorbers towards Q0836+113

Benitez, N. · Martinez-Gonzalez, E. · Sanz, J. L. · Aguirre, A. · Alises, M.

Original · EN

We have performed RIJHKₛ imaging of the field around the z=2.67 quasar Q0836+113, which presents several metal line and a damped Lyαabsorption systems in its spectrum. The images reveal the existence of a red Kₛ=18.9 object ≈ 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 3σlimiting magnitude for extended objects of Kₛ=20.8, the damped Lyαabsorber apparently detected as a Lyαemitter 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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