Temperatures in the atmopshere of the cool component of CH Cygni

Details Temperatures in the atmopshere of the cool component of CH Cygni Temperatures in the atmopshere of the cool component of CH Cygni

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aspc..318..371j&link_type=abstract

In Spectroscopically and Spatially Resolving the Components of the Close Binary Stars, Proceedings of the Workshop held 20-24 Oc

Astronomy and Astrophysics

Astronomy

Scientific paper

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 ɛ 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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