Spectrophotometry of massive eclipsing binary stars

Details Spectrophotometry of massive eclipsing binary stars Spectrophotometry of massive eclipsing binary stars

Nov 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978phdt........10c&link_type=abstract

Ph.D. Thesis Iowa Univ., Iowa City.

Other

Binary Stars, Spectrophotometry, Emission Spectra, Spectrum Analysis, Stellar Spectra, Ultraviolet Spectra

Scientific paper

Normalized flux distributions were measured for U Ophiuchi, AG Persei, lambda Taurii, and V356 Sagittarii from July 1976 to March 1978. The spectra of lambda Taurii are matched by a B4 star and an A4 star at phases 0.77 to 0.90, and by a B3 star and an A4 star at other phases. The spectra of V356 Sagittarii are matched by a B3 star and an AO star, however, the spectra at isolated phases show excess ultraviolet light characteristic of hydrogen free-bound emission. The solutions for the system parameters given by Koch and Koegler (1977) and Popper (1974) were found to satisfy the observed light curves for U Ophiuchi and AG Persei, respectively. The observed normalized flux distributions were compared to normalized flux distributions calculated as a function of phase from a computer model. It was not possible to separate the effects of limb darkening and temperature.

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