Spectrophotometry of massive eclipsing binary stars

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

Sep 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apjs...41....1c&link_type=abstract

Astrophysical Journal Supplement Series, vol. 41, Sept. 1979, p. 1-45.

Statistics

4

Eclipsing Binary Stars, Stellar Envelopes, Stellar Spectrophotometry, Hydrogen, Normalizing (Statistics), Radiant Flux Density, Radiation Distribution, Tables (Data), Ultraviolet Spectra, Wavelengths

Scientific paper

Normalized flux distributions have been measured for U Oph, AG Per, Lambda Tau, and V356 Sgr. Light curves at 4700 A for U Oph and AG Per are used to check published eclipsing-binary-system parameters, and the parameters given by Koch and Koegler (1977) and Popper (1974) are employed for the analysis of U Oph and AG Per, respectively. No evidence of circumstellar matter is found for U Oph and AG Per. The results indicate that the spectra of Lambda Tau from phase 0.77 to 0.90 are characteristic of spectral type B4, that the spectra of V356 Sgr match B3 and A0 spectra except at isolated phases exhibiting UV excess light, and that the excess-light spectrum is characteristic of hydrogen free-bound emission. Color excesses and component-star temperatures and absolute visual magnitudes are determined for U Oph and AG Per.

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