Abstract
Twenty-eight GHz-peaked-spectrum (GPS) radio sources, mainly radio galaxies, have been imaged in the r and i optical bands in order to study the host galaxies and investigate the importance of galaxy-galaxy interactions in leading to the formation of this class of compact radio source. Here we present the observational results, while a subsequent paper will be devoted to the analysis and discussion. We find new identifications for seven objects previously classified as empty fields and one object misidentified with a Galactic star. This reduces the fraction of empty fields in the 1991 O'Dea, Baum, and Stanghellini sample to only ∼ 8 %. We find and confirm that disturbed optical morphologies are a common characteristic of GPS radio galaxies
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