Variable K-type stars in the Pleiades cluster

Details Variable K-type stars in the Pleiades cluster Variable K-type stars in the Pleiades cluster

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982msngr..28...15v&link_type=abstract

ESO Messenger, June 1982, p. 15-18.

Physics

87

K Stars, Late Stars, Pleiades Cluster, Star Clusters, Stellar Spectrophotometry, Variable Stars, Angular Momentum, Light Curve, Stellar Rotation, Taurus Constellation

Scientific paper

Photometric observations of three late G and 16 early K stars in the Pleiades cluster in 1980-81 are reported. Light curves similar to BY Dra stars were observed and sorted by period. Spectroscopic data were also obtained for the stars Hz 1883 and Hz 3163, and rotational velocities of 150 and 75 km/sec, respectively, were detected, high for K-stars. Observed variations in the photometric and rotational periods are discussed in terms of rotational modulation signaled by inhomogeneous luminosity distribution over the stellar surface. Deformation of the stars into triaxial ellipsoids due to their fast rotation could produce light curves with two maxima and minima, which were recorded. Further theoretical work on the model for nonaxial symmetry for fast rotating stars is indicated, particularly in the case of binaries.

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