R-CANIS-MAJORIS - REVISITED

U, B, and V light curves by Radhakrishnan et al. (1985) and H alpha (w ide) and H alpha (narrow) light curves by Edalati et al. (1989) of the semi-detached eclipsing binary system R Canis Majoris (R CMa) were an alyzed using the Wilson-Devinney synthetic light curve method keeping the two parameters, T-e,T-h (temperature of the hot component) and q ( mass-ratio m(c)/m(h)) as fixed at 7310 K and 0.158 (Tomkin 1995), resp ectively. From the results of these analyses the following absolute el ements of the system are obtained: m(h) = 1.070 +/- 0.20 M., m(c) = 0. 168 +/- 0.02 M., R(h) = 1.50 +/- 0.10 R., R(c) = 1.15 +/- 0.08 R., log L(h)/L., = 0.76 +/- 0.18 and log L(c)/L. = -0.41 +/- 0.16. From the p ositions of the primary and secondary components in the plots of log m versus log L, log R, and log T-e for main sequence stars, it is notic ed that both the components are overluminous, oversized, and hotter fo r their derived masses. Assuming the overluminosity of the primary com ponent to be due to overabundance of He, we calculated the initial mas ses of the original primary and secondary components of R CMa.