AAS 205th Meeting, 9-13 January 2005
Session 14 Variable Stars and Stellar Oscillations
Poster, Monday, January 10, 2005, 9:20am-6:30pm, Exhibit Hall

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[14.10] Spot topography of BD+22\circ 4409 (LO Peg) using Matrix Light-curve Inversion

R. O. Harmon, V. Saranathan (Ohio Wesleyan University)

We present maps of starspot distributions for the rapidly rotating K dwarf BD+22\circ4409 (LO Peg), based on BVRI light curves obtained from CCD images aquired in September 2004. The Matrix Light-curve Inversion technique used to invert the light curves is advantageous in that it makes no \emph{a priori} assumptions as to the number of spots or their shapes. The use of multicolor photometry improves the latitude resolution by taking advantage of the differences in the limb darkening in the various filter passbands. Doppler imaging reported in 1999 by Lister, et al. based on August 1993 data indicated cool features at both high and low latitudes. We report the present spot configuration based on our data.

The author(s) of this abstract have provided an email address for comments about the abstract: roharmon@owu.edu

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Bulletin of the American Astronomical Society, 36 5
© 2004. The American Astronomical Society.