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We present an analysis of the optical line emission from nearby barredgalaxies, and in particular look at the radial range occupied by the bar. Inmany cases this region is marked by what we term a 'star formation desert',with a marked deficit of HII regions in optical narrow-band H-alpha imaging.Here we present long-slit spectroscopy revealing that such regions do have lineemission, but that it is low-level, spatially smooth and almost ubiquitous. Therelative strengths of the H-alpha and the spectrally adjacent [NII] lines inthe regions are completely discrepant from those associated with star formationregions, and more closely match expectations for 'LINER' regions. We quantifythe total line emission from these extended, kpc-scale regions, and determinethe spurious contribution it would make to the determined star formation rateof these galaxies if interpreted as normal H-alpha emission. We concur withprevious studies that link this LINER emission to old stellar populations, e.g.post-asymptotic giant branch stars, and propose these strongly-barredearly-type spirals as a prime location for further tests of such emission.

Discovery of kpc-scale line emission in barred galaxies, not linked to AGN or star formation