A&A 426, 309-322 (2004)
MAFAGS-OS: New opacity sampling model atmospheres for A, F and G stars
II. Temperature determination and three "standard" starsF. Grupp
Universitäts Sternwarte München, Scheinerstr. 1, 81679 München, Germany
(Received 16 March 2004 / Accepted 17 June 2004)
The influence of the new MAFAGS-OS opacity sampling model atmosphere and its changed thermal structure is tested on two of the major methods to determine stellar effective temperatures: the infrared flux method and the Balmer line method. Both methods are shown to be affected by the new model. How a change of the resonance broadening theory according to Ali & Griem (1965) improves the theoretical Balmer line spectrum of the Sun is studied.
Key words: methods: numerical -- stars: individual: Procyon -- stars: individual: Groombridge 1830 -- stars: individual: HD 19445 -- stars: atmospheres -- Sun: fundamental parameters
© ESO 2004