2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/157443The observational properties of recurrent novae indicate that they can be divided into two subclasses:systems with a dwarf and a red giant secondary, respectively. The second type -- which includes RS Oph -- bears many similarities to symbiotic stars.10 pages, 3 figures, to appear in the Proceedings of the Meeting: RS Ophiuchi (2006), ed. by Nye Evans, Mike Bode and Tim O'Brien, the Astronomical Society of the Pacific Conference SeriesAstrophysicstext