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Paper: Temperatures in the Atmosphere of the Cool Component of CH Cygni
Volume: 318, Spectroscopically and Spatially Resolving the Components of Close Binary Stars
Page: 371
Authors: Jurdana-Sepic, R.; Kotnik-Karuza, D.; Majlinger, Z.; Pavlenko, Y.V.
Abstract: We have investigated the temperatures in the atmosphere of the cool component of CH Cygni by use of highly resolved optical and near infrared spectra taken in a short epoch of the 1998-2000 active phase. TiO absorption bands belonging to α, γ, γ′, β, δ, φ and ε band systems with partly resolved rotational structure have been studied and vibrational temperatures belonging to γ′ and φ system were obtained from the relative intensities of vibrational band heads. In order to determine the effective temperature we used model atmospheres appropriate for M giants and computed synthetic spectra by the line-to-line approach. Results are discussed in view of the previously determined rotational temperature.
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