Involved people at OAB: Bonifazi, Lolli.
The aim of the work is to increase the database of the fundamental stellar parameters and to test stellar structure and evolution. For this purpose, photometric observations of many binary systems have been collected by means of various telescopes: 60 cm and ``Cassini'' 152 cm of the Bologna Obs. in Loiano and the 600 cm BAT of SAO in Russia, in order to derive their light curves. In addition, the eccentric systems DR Vul, V380 Cyg, RR Lyn, AK Her, ER Vul, BF Aur, which exhibit apsidal motion, are monitored with the 60 cm telescope to obtain precise timings of their light minima.
By means of the "Cassini" telescope - equipped with the Two-heads photometer - the systems XY Leo and RW Com (both of W Uma type) have been observed. With the same telescope (together with the 600 cm BAT, that collected also some spectra) we observed the very interesting PCV NN Serpentis.
The light curve analyses are performed adopting computer codes (Wilson-Devinney, WINK, EBOPC) based on geometric and physical models which account for the various effects acting on the systems components. [In collaboration with A. Guarnieri, C. Bartolini, A. Piccioni and G. Cosentino (Astr. Dept. Bologna Un.), G. Beskin (SAO), L. Milano (Napoli Un.) and F. Barone (Salerno Un.)].