Rotation Periods of Open-Cluster Stars. II

• Published in: Publications of the Astronomical Society of the Pacific Vol. 105; no. 694; pp. 1407 - 1414
• Main Authors: Prosser, Charles F., Shetrone, Matthew D., Marilli, Ettore, Catalano, Santo, Williams, Scott D., Backman, Dana E., Laaksonen, Bentley D., Adige, Vikram, Marschall, Laurence A., Stauffer, John R.
• Format: Journal Article
• Language: English
• Published: Chicago, IL American Institute of Physics 01.12.1993; University of Chicago Press
• Subjects: Astronomy; Comparison stars; Dwarf stars; Earth, ocean, space; Exact sciences and technology; K dwarfs; Light curves; Observational astronomy; Observational research; Observatories; Open clusters in the milky way; Rotation; Stars; Stellar clusters and associations; Stellar rotation; Stellar systems. Galactic and extragalactic objects and systems. The universe; Periods; Late type stars; K stars; G stars; Open clusters; Dwarf stars; Star clusters; Pleiades; F stars; Rotation; Photometry
• ISSN: 0004-6280; 1538-3873

We present the results from a photometric monitoring program of 21 stars observed during 1992 in the Pleiades and Alpha Persei open clusters. Period determinations for 16 stars are given, 13 of which are the first periods reported for these stars. Brightness variations for an additional five cluster stars are also given. One dwarf member of the α Per cluster is observed to have a period of rotation of only 4.39 hr, perhaps the shortest period currently known among BY Draconis variables. The individual photometric measurements have been deposited with the NSSDC. Combining current X-ray flux determinations with known photometric periods, we illustrate the X-ray activity/rotation relation among Pleiades dwarfs based on available data.