Revised Photometric Elements of 5 Possible Sd-D Systems

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

Photoelectric lightcurves of five eclipsing binaries, suspected of having undersize subgiant secondaries (i.e. sd-d systems), have been reanalyzed by means of Wood's model in order to obtain homogeneous photometric elements. FL Lyr appears to be a normal main sequence detached system XX Cep and probably V 548 Cyg turn out to be common sd-systems, whereas only for TW Cas and AD Her might the sd-d classification be retained.

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