The Wilson-Devinney software package models these systems and allows one to incorporate the reflection effect, limb darkening and tidal effects into them.
The Wilson-Devinney software package models these systems and allows one to incorporate the reflection effect, limb darkening and tidal effects into them. The currently unexplained O'Connell Effect is the name given to the phenomenon of the maxima of these system's brightness clumping together on a visual diagram. Harlow Shapley proved that the Cepheidswere not actually this kind of system since the Cepheids' separation distance would have to be smaller than their individual sizes. Their light curves feature periodic dips since the plane of rotation of these systems coincides with a viewer's line of sight. Algol was called the ";demon star"; since it is one of these systems, which gave ancient observers the impression of ";winking."; For 10 points, name these extrinsic variable stars in which one star periodically occults the other star.
The Wilson-Devinney software package models these systems and allows one to incorporate the reflection effect, limb darkening and tidal effects into them.
eclipsing binary [accept word forms for  eclipse; prompt on "binary (star);" prompt on "variable stars" before "separation."]