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We carry out a photometric study of a poor group of late-type galaxies aroundIC 65, with the aim: (a) to search for new dwarf members and to measure theirphotometric characteristics; (b) to search for possible effects of mutualinteractions on the morphology and star-formation characteristics of luminousand faint group members; (c) to evaluate the evolutionary status of thisparticular group. We make use of our BRI CCD observations, DPOSS blue and redframes, and the 2MASS JHK frames. In addition, we use the HI imaging data, thefar-infrared and radio data from the literature. Search for dwarf galaxies ismade using the SExtractor software. Detailed surface photometry is performedwith the MIDAS package. Four LSB galaxies were classified as probable dwarfmembers of the group and the BRI physical and model parameters were derived forthe first time for all true and probable group members. Newly found dIrrgalaxies around the IC 65 contain a number of H II regions, which show a rangeof ages and propagating star-formation. Mildly disturbed gaseous and/or stellarmorphology is found in several group members. Various structural, dynamical,and star-forming characteristics let us conclude that the IC 65 group is atypical poor assembly of late-type galaxies at an early stage of its dynamicalevolution with some evidence of intragroup (tidal) interactions.

Photometric study of the IC 65 group of galaxies