Two-colour Photoelectric Photometry of GO Cygni

Open Access
Publisher Website
Google Scholar
Abstract
Photoelectric light-curves in the blue and yellow have been obtained for GO Cygni from observations with tht Cambridge pulse-counting photometer during the period 1950 August to 1951 October. The paper reports, analyses and discusses these observations. Both light-curves show strong asymmetrical terms in the variation of light between eclipses; the observations show that the processes giving rise to these terms suffer intrinsic variations. The observed differences of magnitude at maxima are compared with O'Connell's statistical conclusions. Elements for the binary are derived by Russell's method, Pearce's spectrographic observations being utilized. The comparison of the light-curves in the two colours gives evidence that the observed secondary spectrum (type Ao) is due to reflection, the spectral type of the secondary if unaffected by reflection being later than F8. The assumption that the radiation of the secondary arises from a point close to the primary star serves to reconcile the deduced masses with the general mass–spectral type relationship.

This publication has 0 references indexed in Scilit: