Proper motions, membership, and internal motions in the globular cluster M3

Abstract

view Abstract Citations (97) References (22) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Proper motions, membership, and internal motions in the globular cluster M3. Cudworth, K. M. Abstract Relative proper motions with typical standard errors approximately equal to + or - 0.020 arcsec/century have been measured for 266 stars in the region of M3, yielding an excellent segregation of cluster members from the field stars. The cluster membership status of several variable stars and UV-bright stars is discussed. The internal proper motion dispersion has been detected and is isotropic from approximately 4 core radii out to approximately 15 core radii and probably anisotropic beyond approximately 15 core radii, in agreement with the best dynamical models. Comparison with radial velocity data yields the first astrometric distance to a globular cluster. A largely unsuccessful attempt is made to derive the absolute proper motion of the cluster. Publication: The Astronomical Journal Pub Date: September 1979 DOI: 10.1086/112543 Bibcode: 1979AJ.....84.1312C Keywords: Astrometry; Globular Clusters; Star Distribution; Stellar Motions; Astronomical Photometry; Distance; Hertzsprung-Russell Diagram; Tables (Data); Ultraviolet Radiation; Variable Stars; Astronomy; Globular Clusters:Internal Motions; Globular Clusters:Membership; Globular Clusters:Proper Motions full text sources ADS | data products SIMBAD (261)