Title
Rotational Periods and Starspot Activity of Young Solar-Type Dwarfs in the Open Cluster IC 4665
Roles
Bentley D. Laaksonen: Class of 1995
Document Type
Article
Publication Date
1996
Department 1
Physics
Abstract
We present the results of a V-band photometric monitoring survey of 15 late-type dwarfs in the young open cluster IC 4665. Low-amplitude periodic light variations are found for 8 stars and ascribed to the modulation by starspots that cover typically a few percent of the stellar disk. Periods range from 0.6 to 3.7d, translating to equatorial velocities between 13 and 93 km.s-1. That no period longer than 4d was detected suggests a relative paucity of extremely slow rotators (Veq << 10 km.s-1) among late-type dwarfs in IC 4665. The fractional number of slow rotators in IC 4665 is similar to that of Alpha Per cluster, suggesting that IC 4665 is close in age to Alpha Per (~50 Myr).
Copyright Note
This is the publisher's version of the work. This publication appears in Gettysburg College's institutional repository by permission of the copyright owner for personal use, not for redistribution.
Recommended Citation
Allain, S., et al. Rotational Periods and Starspot Activity of Young Solar-Type Dwarfs in the Open Cluster IC 4665. Astronomy and Astrophysics (1996) 305:498-506.
Required Publisher's Statement
Copyright held by Astronomy and Astrophysics. Original publisher's version is available at: http://www.aanda.org/
Included in
Other Astrophysics and Astronomy Commons, Stars, Interstellar Medium and the Galaxy Commons