UBV photometry of eclipsing binaries in the LMC

Details UBV photometry of eclipsing binaries in the LMC UBV photometry of eclipsing binaries in the LMC

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aj.....94.1169d&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 94, Nov. 1987, p. 1169-1177. Research supported by the University of Victoria and NS

Astronomy and Astrophysics

Astronomy

11

Astronomical Photometry, Eclipsing Binary Stars, Magellanic Clouds, Ubv Spectra, Brightness, Distance, Electrophotometry, Interstellar Extinction, Light Curve

Scientific paper

UBV photoelectric observations are presented for three eclipsing binaries in the LMC: HV 2241, HV 2765, and HV 5943. Prior to solving the light curves, the photoelectric data were corrected for crowding by studying models, based on CCD observations, of the fields around the variables. The brightnesses of contaminating stars, both near the variables and in the areas selected for sky measurements, were determined by simulating aperture photometry on the modeled star fields. The light curves were solved with the Wilson-Devinney program by making a systematic search of parameter space. Numerical simulations showed that a search involving only one fixed parameter, the mass ratio, produced systematic errors in the solution elements. However, a search involving two fixed parameters, the mass ratio and surface potential of the secondary component, found solution elements that are apparently free of systematic effects and correct within the uncertainties estimated for them by the program. Preliminary absolute dimensions are computed for the components, and the evolutionary status of the systems is discussed.

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