Imaging Starspots on LO Pegasi via Light-curve Inversion

Details Imaging Starspots on LO Pegasi via Light-curve Inversion Imaging Starspots on LO Pegasi via Light-curve Inversion

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.6007h&link_type=abstract

American Astronomical Society, AAS Meeting #211, #60.07; Bulletin of the American Astronomical Society, Vol. 39, p.844

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We present maps of the star LO Pegasi obtained via Light-curve Inversion, a computational technique which produces an image of a star's surface features based on variations in the star's observed brightness as dark starspots rotate into and out of view from Earth. LO Pegasi is a rapidly rotating (P=10.17 hr) K8V young solar analog. We inverted BVRI light curves obtained from CCD images acquired on July 7-9 and July 22-23, 2007 at Perkins Observatory in Delaware, OH. Using multiple filters significantly improves the latitude resolution of our maps. Our inversions revealed the presence of a large mid-latitude spot or spotted region on the map from July 7-9, which appears to have evolved into a more complex two-spot configuration by July 22-23.
The authors wish to acknowledge the support of the NSF REU Program and the Ohio Wesleyan University Summer Science Research Program.

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