FH Leonis, the first dwarf nova member of a multiple star system?

Abstract

Aims.Sudden brightenings of HD 96273 or BD+07 2411B were observed with the HIPPARCOS satellite in 1992, which still require a convincing explanation.
Methods: .A new analysis of all known data of these two stars is given, including additional information on the Balmer line equivalent widths.
Results: .The brightenings can be explained as SU UMa type dwarf nova outbursts, superimposed on the combined light of two normal F and G type main sequence stars. Since the hypothetical dwarf nova turns out to be located at the same distance as HD 96273 and BD+07 2411B, we possibly see here the first case of a cataclysmic variable as a member of a multiple star system. Questions on history and evolution, as well as possible ways to confirm this interpretation, are briefly outlined.