[22.05] Anomalous Colors of Spotted Variable Stars in the Alpha Persei Cluster

AAS 205th Meeting, 9-13 January 2005
Session 22 Open Clusters Young and Old
Poster, Monday, January 10, 2005, 9:20am-6:30pm, Exhibit Hall

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[22.05] Anomalous Colors of Spotted Variable Stars in the Alpha Persei Cluster

D. M. Terndrup, M. H. Pinsonneault, D. An, J. Marshall, T. Scaife (OSU), A. Daane (OSU/Clemson)

We present time-series photometry in BVRI of several spotted G-K stars in the Alpha Persei open cluster. Such stars are known to have anomalous colors, particularly but not exclusively in B-V, which need to be accounted for in the determination of cluster distances from main-sequence fitting. We describe a method for correcting the anomalous colors once vsini or the rotation period is known, and provide a new measurement of the distance and age of Alpha Persei.

The author(s) of this abstract have provided an email address for comments about the abstract: terndrup@astronomy.ohio-state.edu

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