Towards a Direct Detection of Warm Gas in Galactic Haloes at Cosmological Distances
Milan M. Cirkovic, J. Bland-Hawthorn, Srdjan Samurovic
Abstract
Recent highly sensitive detections of line emission from extended gas in the local universe demonstrate the feasibility of detecting Hα emitting galactic halos out to z1. We determine the form of the surface brightness vs. redshift dependence which takes into account UV background evolution. Successful detections will have a major impact on a wide range of fields, in particular, the source of ionization in QSO absorption systems.
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