A photometric survey of the Alpha Persei cluster for Delta Scuti variables

Abstract

view Abstract Citations (21) References (23) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A photometric survey of the alpha Persei cluster for delta Scuti variables. Slovak, M. H. Abstract To investigate the incidence of Delta Scuti variables in the Alpha Persei cluster, a program of differential photometry was undertaken which included 24 A- and F-type stars (V no more than 9.48) in or near the Delta Scuti instability strip. All stars in the sample were determined to have a high probability of cluster membership on the basis of multiple criteria, including proper motions, radial velocities, and extensive photometric data. Three variables were detected (BD +48 deg 894, BD +48 deg 905, and BD +47 deg 842). These are located in the region of the instability strip and have periods close to those predicted from the period-color-luminosity relation. The relative incidence of Delta Scuti variables in the cluster is approximately 25%. As in the Pleiades cluster, the main-sequence variables may be slower rotators than the nonvariables in the instability strip. The exclusion of pulsation among main-sequence Am stars in the cluster is also confirmed. Publication: The Astrophysical Journal Pub Date: July 1978 DOI: 10.1086/156250 Bibcode: 1978ApJ...223..192S Keywords: Star Clusters; Stellar Evolution; Stellar Spectrophotometry; Variable Stars; A Stars; F Stars; Main Sequence Stars; Pleiades Cluster; Radial Velocity; Stellar Motions; Astronomy; Delta Scuti Stars:Open Clusters full text sources ADS | data products SIMBAD (23)