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Title: Spectrophotometric studies of CO Cephei
Authors: Shylaja, B. S
Keywords: Cepheid Variables;Eclipsing Binary Stars;Stellar Spectrophotometry;Wolf-Rayet Stars;Companion Stars;Emission Spectra;Helium;Light Curve;Nitrogen;Radial Velocity;Roche Limit;Stellar Atmospheres;Stellar Winds
Issue Date: Sep-1986
Publisher: Indian Academy of Sciences
Citation: Journal of Astrophysics and Astronomy, Vol. 7, No. 3, pp. 171 - 194
Abstract: Spectrophotometric and spectroscopic observations of CQ Cep, the shortest-period binary with a WN component, are presented. Excepting the N V 4603 A, the fluxes of all other emission lines show enhancement at minima. They can be explained by the Roche surfaces that take into account the strong wind of the WN7 component. Various radial velocity curves for emission and absorption give different orbital solutions with a general positive shift of gamma axes. Although N IV 4058 A represents the true motion of the WN7 component, its flux variations are influenced by geometric effects. There is no signature of the companion. The extent of the atmosphere of CQ Cephei appears larger than in V444Cyg, another eclipsing binary with a Wolf-Rayet component.
ISSN: 0250-6335
Appears in Collections:IIAP Publications

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