A Critical Appraisal of Atlas9 and Nextgen5 Model Atmospheres

The fitting atmosphere parameters (Teff, g, and [Fe/H]) for over 300 stars in the Gunn & Striker (1983) and Jacoby et al. (1984) catalogs have been obtained relying on the Kurucz (1992) ATLAS9 and Hauschildt et al. (1999) NextGen5 synthesis models. The output results are compared, and a critical appraisal of both theoretical codes is performed.