YZ Phe: an active contact binary with variation of the O'Connell effect and orbital period change

T. Sarotsakulchai, S. -B. Qian, B. Soonthornthum +7

YZ Phe is a very short-period contact binary (Sp.= $K2V$) with an orbital period of 0.2347 days near the short period limit (0.22 d). We present the complete light curves in $VRI…