1995PASP..107..219A

We present results of a spectroscopic investigation of the A and B components of the visual binary VW Ari.
Result. are: 1) the atmospheric parameters for the stars are Teff = 7100 K, log g = 3.7 (A component), Teff = 7300 K, log g=4.3, V_t = 1.9 km s^-1 (B component); 2) the masses and radii are R_A ∼ 3.5 R_sun, R_B ∼ 1.6 R_sun; M_A ∼2.2 M_sun, M_B ∼ 1.8 M_sun; 3) abundances of 16 elements have been determined for VW Ari B. This star shows solar-like chemical composition for most of the elements. 4) Because of the complicated spectrum of VW Ari A (only a few very shallow lines are seen), we were able to estimate only Ca and Fe abundances in its atmosphere: [Ca/H] = -0.73, [Fe/H] = -0.46. The remarkable metallicity difference between the components strongly supports the hypothesis of stellar capture as most probable origin of the VW Ari system.