Naslov
Atmospheric thermal structure of a sample of M type giants

Autori
Jurdana-Šepić, Rajka ; Kotnik-Karuza, Dubravka

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

Izvornik
Abstract Book JENAM 2000 (9th European Astronomical Society Conference) / A. Cherepaschuk - Moskva : European Astronomical Society, 2000

Skup
JENAM 2000 (9th European Astronomical Society Conference)

Mjesto i datum
Moskva, Ruska Federacija, 30.05.2000. - 04.06.2000

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
M giant stars; stellar atmospheres

Sažetak
The evolution of binary systems depends strongly on the mass transfer beetwen the two components, the one of which is often a late type giant. In order to understand it and in the case when the mass transfer occurs via stellar wind, it is important to investigate the thermal structure of the giant's photosphere. The calibration of effective temperature scale and establishment of its correlation to the excitation temperature for different spectral subtypes has significant implications in determination of the atmospheric structure for cool giant stars. We took the sample of 10 M type giants of luminostiy class III and subtypes M2-M8 located in the Galactic plane and determined their vibrational temperatures from the gamma band system of the TiO molecule. The relationship between Texc and Teff has proved to be sensitive to the choice of the Teff calibration scale. The deviations of Texc with respect to the Teff for our stars have been used as an indicator of the depth of the atmospheric layers in which molecular bands are formed.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA