Molecular spectroscopy of CH Cygni in the 1998-2000 active phase (CROSBI ID 492976)
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Podaci o odgovornosti
Kotnik-Karuza, Dubravka ; Jurdana-Šepic, Rajka ; Majlinger, Zlatko
engleski
Molecular spectroscopy of CH Cygni in the 1998-2000 active phase
We study the very peculiar symbiotic binary CH Cygni, in particular the physical conditions in the photosphere of its cool component which has been classfied as an M late type giant due to its spectral appearance in the optical and near IR spectral region during quiescent and active phases. Several consecutive spectra obtained with different exposure times covering the region ~4800-9000 A were obtained in the time of the 1998-2000 activity (November 1999). We have concentrated our investigations on the TiO absorption bands which are the most outstanding feature in these spectra. The bands, some of which give evidence of a resolved rotational structure, have been identified as members of the a, g, g', b, d, f, e band systems. Measurement of the band head relative intensities and intensities of some rotational lines have led to determination of excitation temperatures of the coolest layers in the red giant's photosphere. These results have been compared to the excitation temperatures obtained by use of the same method during one of the quiescent phases of the star.
CH Cyg ; excitation temperature ; TiO molecule ; optical spectrum ; vibration ; rotation
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Podaci o prilogu
80-80.
2003.
objavljeno
Podaci o matičnoj publikaciji
JENAM 2003 : Abstracts
Budimpešta: EAS
Podaci o skupu
JENAM 2003
poster
25.08.2003-30.08.2003
Budimpešta, Mađarska