Stellar Surface Image of LO Pegasi via Light-curve Inversion

Details Stellar Surface Image of LO Pegasi via Light-curve Inversion Stellar Surface Image of LO Pegasi via Light-curve Inversion

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21343406h&link_type=abstract

American Astronomical Society, AAS Meeting #213, #434.06; Bulletin of the American Astronomical Society, Vol. 41, p.304

Astronomy and Astrophysics

Astronomy

Scientific paper

We present images of dark starspots on the surface of the K8 main-sequence star LO Pegasi. CCD images of the star and surrounding field were acquired through B, V, R and I filters at Perkins Observatory in June and July, 2008. The images were dark-subtracted and flat-fielded and then aperture photometry was performed to yield light curves through each of the four filters. These light curves were then simultaneously inverted via an algorithm devised by one of us (Harmon) so as to yield images of the spots based on the rotational modulation they produced in the light curves. The use of multiple filters significantly improves the latitude resolution of the reconstructions. Comparison of our results with results from 2006 and 2007 shows that the spot structure was more complex in 2008 than in the prior years.
This research was funded by the NSF REU Program and the Ohio Wesleyan University Summer Science Research Program.

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