We present a 30 year compilation of V-band differential photometry for the Pleiades K dwarf HII 1883. HII 1883 has an average rotational period (Pr ot) of ~ 0.235d and displays rotational modulation due to non-uniform surface brightness as large as 0.2 magnitudes in V.Preliminary work yields a cycle period of ∼ 9yrs and rotational shear oPr ot/(Pr ot) considerably less than solar. With such a long baseline of data available we can explore many aspects of the star’s photometric variability. We present studies of the variation of the rotational modulation amplitude, (V), and Pr ot over the cycle.
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.
Milingo, J.B., et al. Rotational Modulation, Shear, and Cyclic Activity in HII 1883. Proceedings of the International Astronomical Union 2010 (273), 74-77.
Required Publisher's Statement
Original publisher's version available at: http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=8360132