A systematic search for members of the Hyades Supercluster. IV - The metallic-line stars and ultrashort-period Cepheids

Abstract

view Abstract Citations (14) References (38) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A systematic search for members of the Hyades supercluster. IV. The metallic- line stars and ultrashort-period Cepheids. Eggen, O. J. Abstract The stars in the Bright Star Catalogue with β = 2.70 - 2.88 (Te ≡ 6700 - 8100K, spectral type A4 to F1) contain 127 members of the Hyades Supercluster, chosen on the basis of the direction of their proper motion. The available radial velocities confirm supercluster membership, within their uncertainty, for most of these stars. The older stars with β > 2.5 mag are Am and/or ultrashort-period Cepheids (USPC) with only a half-dozen exceptions, whereas in the younger population the Am stars and USPC represent only some 25% of the sample. Outside the center of the Hyades cluster, the largest concentration of supercluster stars is in a region of 30 pc radius between 60 and 80 pc above the Sun, where 30% of the expected stars in the temperature range discussed here are supercluster members. Publication: The Astronomical Journal Pub Date: June 1985 DOI: 10.1086/113812 Bibcode: 1985AJ.....90.1046E Keywords: A Stars; Cepheid Variables; Galactic Clusters; Metallic Stars; Star Distribution; Stellar Motions; Astronomical Catalogs; Binary Stars; Radial Velocity; Stellar Evolution; Stellar Mass; Stellar Models; Stellar Temperature; Astrophysics full text sources ADS | data products SIMBAD (130) Related Materials (4) Part 1: 1984AJ.....89..830E Part 2: 1984AJ.....89..839E Part 3: 1984AJ.....89.1358E Part 5: 1985AJ.....90..333E