view Abstract Citations (99) References (42) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Hyades main sequence. Eggen, O. J. Abstract Intermediate band, H-beta and RI observations of 72 Hyades cluster stars to V = 11 mag are reported and discussed. A modulus of 3.2 mag is derived on the basis of a comparison with field stars of large parallax. Also presented are observations of 98 main-sequence stars of the Hyades group that were previously found to be group members from kinematical considerations. Parallaxes of the group stars, computed on the assumption that they are members of an extended Hyades cluster, yield mean values of (U, V, W) = (+40.5, -18.4, -4.9) km/s, with dispersions of (2.3, 2.3, 6.0) km/s, compared with (+41.7, -18.4, -2.0) and (2.6, 1.3, 1.9) km/s for the brightest cluster members. It is noted that all the stars discussed can be considered as members of a supercluster in which only a slight relaxation control of the W velocities is present for stars far from the nucleus. Evidence is found, including that of the Praesepe cluster at Z = +80 pc, for some interchange between the U, V, and W velocities in stars farthest from the galactic plane, with the total cluster velocity being maintained. Publication: The Astrophysical Journal Supplement Series Pub Date: November 1982 DOI: 10.1086/190826 Bibcode: 1982ApJS...50..221E Keywords: Main Sequence Stars; Star Clusters; Stellar Evolution; Stellar Models; Radial Velocity; Stellar Luminosity; Stellar Parallax; Stellar Spectrophotometry; Tables (Data); Astronomy full text sources ADS | data products SIMBAD (235) GCPD (1)