Naslov
Molekulska spektroskopija CH Cygni u aktivnoj fazi 1998-2000
(Molecular spectroscopy of CH Cygni in the 1998-2000 active phase)

Autori
Kotnik-Karuza, Dubravka ; Jurdana-Šepic, Rajka ; Majlinger, Zlatko

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
JENAM 2003 : Abstracts / - Budimpešta : EAS, 2003, 80-80

Skup
JENAM 2003

Mjesto i datum
Budimpešta, Mađarska, 25.08.2003. - 30.08.2003

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
CH Cyg ; excitation temperature ; TiO molecule ; optical spectrum ; vibration ; rotation

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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