Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...353..524r&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 353, April 20, 1990, p. 524-532. Research supported by Lowell Observatory a
Astronomy and Astrophysics
Astrophysics
18
Main Sequence Stars, Star Clusters, Stellar Activity, Stellar Rotation, Annual Variations, Radial Velocity, Stellar Spectrophotometry, Variability
Scientific paper
High-precision, differential, Stromgren b, y photometric observations of nine members of the Coma star cluster, spectral types of F3 V to K0 V, were made at Lowell Observatory between 1984 and 1987. It is found that four G-type stars in this sample were all variable on both seasonal and year-to-year time scales, and the single K-type star also showed hints of variability. In contrast, four F-type stars were not detectably variable on either time scale. The variable stars tended to become slightly bluer as they brightened. The low-level photometric variability of Coma stars appears to resemble closely that observed among similar stars in the Hyades cluster.
Lockwood Wesley G.
Radick Richard R.
Skiff Brian A.
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