2007MNRAS.381..663K

High-resolution spectroscopic observations around the Hα line and BVRI photometry of the eclipsing short-period RS CVn star UV Leo are presented. The simultaneous light-curve solution and radial velocity-curve solution led to the following values of the global parameters of the binary: temperatures T₁= 6000±100 K and T₂= 5970±20 K; masses M₁= 0.976±0.067M_☉ and M₂= 0.931±0.052M_☉; separation a = 3.716±0.048R_☉; orbital inclination; radii R₁= 1.115±0.052R_☉ and R₂= 1.078±0.051R_☉; equatorial velocities V₁= 98.8±2.3km/s and V₂= 89.6±2.7km/s. These results lead to the conclusion that the two components of UV Leo are slightly oversized for their masses and lie within the main-sequence band on the mass-radius diagram, close to the isochrone 9x10¹⁰yr.