Light Curve Analysis of All-Sky Automated Survey for Supernovae Data on a Sample of W Ursae Majoris Eclipsing Binary Stars in the Constellation Ursa Minor
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Abstract
In This research, I study fifty W Ursae Majoris eclipsing binaries of constellation Ursa Minor from a sample of the ASAS-SN Catalog of Variable Stars. The light curve with PHOEBE program based on the Wilson–Devinney algorithm was used. The results show that the fifty systems are the A-subtype of W Ursae Majoris eclipsing binary. I found the mass ratio of all systems less than 1. The primary component of all systems is the massive one. The light curve of AT UMi binary displays the effective temperature of secondary component more than primary component. The secondary components of all systems have radii larger than ZAMS evolutionary of about the same mass. The all of stars sample are the main sequence stars. The cool spots appear on the secondary component of the AP UMi and the RZ UMi binary. The degree of contact, the phase shift and the orbital inclination of all systems are corresponding to the geometric structure modeling.
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