Ages and masses of Delta Scuti stars in the Praesepe cluster

The study derives physical parameters and radial pulsation modes for three Delta Scuti stars in the Praesepe cluster: HD 73345, HD 73712, and HD 73746. Their ages and evolutionary masses are interpolated in the track systems of Iben (1967) and Paczynski (1970). These age estimates are combined with previous results for nine other Delta Scuti stars in the Praesepe cluster to obtain the following mean age estimates of this cluster: (14.2 +/- 1.3) x 10 exp 8 yr and (5.4 +/- 0.4) x 10 exp 8 yr. Age and evolutionary mass estimates of the 12 cluster variables are also obtained in the modern track system of Maeder and Meynet (1988), in which the weighted mean cluster age is (15.3 +/- 1.0) x 10 exp 8 yr. (AIAA)