Key points are not available for this paper at this time.
By subtracting the cooling age of the dimmest white dwarf in the Hyades cluster from the age of the cluster, the mass of the white dwarf progenitor is estimated to be 3.0 solar masses, compared with the 2.25 solar masses for a main sequence stars near the turnoff point in the cluster. It is inferred that there should be at least 21 white dwarfs dimmer than the seven confirmed white dwarf cluster members which presumably derive from stars of initial mass 2.5-3 solar. It is found that about two fifths of all nearby white dwarfs are streaming within 13 deg of the direction of the Hyades convergent point with a velocity dispersion of 5 km/s about the cluster speed of 46.6 km/s. The shape of orbits of stars leaving a hypothetic cluster is examined and related to the supercluster concept of Eggen.
Weidemann et al. (Sun,) studied this question.