Hα fluorescence in ultraviolet active binary stars

Details Hα fluorescence in ultraviolet active binary stars Hα fluorescence in ultraviolet active binary stars

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001phdt.........3v&link_type=abstract

Thesis (PhD). UNIVERSITY OF FLORIDA, Source DAI-B 62/03, p. 1434, Sep 2001, 84 pages.

Computer Science

Scientific paper

Light curves, radial velocity curves, and Hα spectral profile models were generated for the eclipsing binaries V471 Tau and FF Aqr. We modeled an emission region on the cool star of each system to simulate fluorescent activity on the side of the star facing its hot companion. Comparisons of the models to our photometric and spectroscopic observations reveal additional components that may arise from the intrinsic chromospheric activity of the cooler star and be associated with dark spotted regions. More emissions were found at higher velocities that place the activity well above the star but still between the two stars. The sources of these excess emissions may be extended structures such as prominences, a partially ionized wind, or circumstellar material such as a ring or disk. The combined emissions greatly complicate a formerly simple illumination model.

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