the temperature for star 1 was estimated to be T1 = 7728 K, which is close to the temperature of an A8 V star (T1 = 7652 K; Cox 2000). By considering that the hot component is slightly evolved from the zero-age main-sequence stage, its temperature may be higher than T1 = 7652 K and the value of T1 = 7728 K may be more reliable.