Disentangling Effective Temperatures of Individual Eclipsing Binary Components by Means of Color-Index Constraining
Authors: Prša, A.; Zwitter, T.
Source: Astrophysics and Space Science, Volume 304, Numbers 1-4, August 2006 , pp. 347-350(4)
Abstract:Eclipsing binary stars are gratifying objects because of their unique geometrical properties upon which all important physical parameters such as masses, radii, temperatures, luminosities and distance may be obtained in absolute scale. This poses strict demand on the model to be free of systematic effects that would influence the results later used for calibrations, catalogs and evolution theory. We present an objective scheme of obtaining individual temperatures of both binary system components by means of color-index constraining, with the only requirement that the observational data-set is acquired in a standard photometric system. We show that for a modest case of two similar main-sequence components the erroneous approach of assuming the temperature of the primary star from the color index yields temperatures which are systematically wrong by ∼ 100K.
Document Type: Research Article
Publication date: August 1, 2006