Light Curves and Roche Configurations of Near-Contact Binary AX Draconis

Details Light Curves and Roche Configurations of Near-Contact Binary AX Draconis Light Curves and Roche Configurations of Near-Contact Binary AX Draconis

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jass...20..239k&link_type=abstract

Journal of Astronomy and Space Sciences. Vol. 20, no. 4, 239-248

Astronomy and Astrophysics

Astronomy

Eclipsing Binary, Ax Dra, Photometry, Roche Configuration, Spot

Scientific paper

We completed the light curves of near-contact binary system AX Dra for 11 nights from March 2001 to May using the 61-cm reflector and VR filters at Sobaeksan Optical Astronomy Observatory. From our observations, seven new times of minimum light (three timings for primary eclipse, four for secondary) and the light elements consistent with recent observations were determined. Using the Wilson-Devinney binary code and the q-search method, we analyzed our VR light curves for various Roche configurations and mass ratios. As the results, we found the eclipsing binary AX Dra to be the FO Vir-type near-contact binary system interpreted as a detached or a semi-detached system, with the secondary filling its Roche lobe and the primary almost. Unlike the statistical study(Shaw 1994) of the FO Vir-type near-contact binary system, our VR light curves showed the O'Connell effect of all the same type and it's dimensions was about 0.008m.

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