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izvor podataka: crosbi

Search for the remnants of the 1977-1986 outburst in the quiescent phase of CH Cygni (CROSBI ID 95174)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Jurdana, Rajka ; Kotnik-Karuza, Dubravka Search for the remnants of the 1977-1986 outburst in the quiescent phase of CH Cygni // Astronomy and astrophysics. Supplement series, 108 (1994), 533-545-x

Podaci o odgovornosti

Jurdana, Rajka ; Kotnik-Karuza, Dubravka

engleski

Search for the remnants of the 1977-1986 outburst in the quiescent phase of CH Cygni

We present the results of spectroscopic measurements of line spectra of the symbiotic star CH Cygni in the optical region of the EM spectrum. The observations extend over a period of two years (1987-89) and cover the quiescent state of the star. Although in most spectra the flat transition part of the curve of growth was predominant, a refined fitting procedure made possible the evaluation of the excitation temperature and microturbulent velocity for neutral metals in the red giant's photosphere. A regular decrease of the excitation temperature within the same interval for the investigated elements has been found, with the exception of Fe I for which the temperatures are higher. The microturbulent velocities show small erratic variations around a mean value, which is greater for Fe I than for the other elements. This could be explained by a stratification in the photosphere of the cool component.

stars:CH Cyg - binaries: symbiotics - stars:atmospheres

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Podaci o izdanju

108

1994.

533-545-x

objavljeno

0365-0138

1286-4846

Povezanost rada

Fizika