Astronomy and Astrophysics – Astronomy
Scientific paper
May 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pasp...95..319e&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 95, May 1983, p. 319-324. Research supported by the Kon
Astronomy and Astrophysics
Astronomy
1
B Stars, Eclipsing Binary Stars, Light Curve, Stellar Spectrophotometry, Ultraviolet Spectra, Variable Stars, Interstellar Extinction, Main Sequence Stars, Orbital Elements, Stellar Color, Stellar Luminosity, Stellar Mass
Scientific paper
The early-type eclipsing binary Delta Pictoris has been studied with 260 observations in each of five UV bands. These are the most accurate observations to date, and no strong evidence for light-curve complications produced by circumstellar material has been found. Combined light curves from four epochs separated by intervals of six months do not show any strong dips or shoulders as seen in earlier investigations. The strength of th C IV wavelength 1550 line is independent of phase to better than 0.01 m. The root-mean-square scatterer shown by the light curves ranges from 0.006 m to 0.014 and may be evidence that either or both of the components are intrinsically variable. The integrated colors of the system are consistent with a B1 V spectral type and very little interstellar extinction. A detached solution of the light curves for a Roche model well with the spectroscopic mass ratio, but a semidetached solution cannot be ruled out.
Eaton Joel A.
Wu Congjun
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