Physics
Scientific paper
Aug 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007phdt........14h&link_type=abstract
Proquest Dissertations And Theses 2007. Section 0013, Part 0606 238 pages; [Ed.D. dissertation].United States -- Indiana: Ball
Physics
Starspot, Photometry, Binary Stars
Scientific paper
Starspots are not well understood for contact binary star systems. The following properties of spots were systematically investigated: temperature, radius, colatitude, and longitude. Spots were modeled on an AE Phe like contact binary system. The spots were changed in a systematic manner. The light curve phases of primary minimum and primary maximum were affected by these parameter changes in a systematic manner, as well as the secondary minimum and maximum. It will be shown that it is possible to use the shift in these phases to study starspots over time. This information can also be used to identify the presence of spots in binary star systems.
Starspots on contact binary systems are not commonly found at a longitude near 180°. The results of this study show that starspots near 180 ° should be the easiest to detect using photometric techniques. This is the most significant result from this study. Either there is an unknown physical reason why contact binary stars do not have starspots near a longitude of 180°, or the stars pots are there and the photometric data has been misinterpreted.
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