Creation of a model atmosphere database for star sed models

Within the scope of this thesis, a library of synthetic spectrum has been created using model atmospheres for the spectral energy distributions (SED) of stars. Synthetic spectrums have been obtained to model the stellar energy distributions over a wide wavelength range (900 − 30000 Å) using their atmospheric parameters such as effective temperature (4000 − 15000 K), surface gravitational acceleration (3.0 − 5.0 cgs), metal abundance (-2.0 − +1.0 dex) and micro-turbulence velocity (0, 1, 2 km s−1). Using the spectrums in the synthetic spectrum library, a computer code was developed to find the best models representing the stellar spectral energy distributions with χ2. With the help of this code, not only the atmospheric parameters of the stars, but also information about the absorption of the interstellar medium between the star and the ground and a rough radius are obtained. The Association of Aur-OB2 was chosen as a sample region and the members of the association were first identified. The atmospheric parameters of the members were obtained from the literature, extinction and rough radius information were obtained by the developed code. The radius was calculated using the brightnesses obtained from the literature, atmospheric parameters and the extinction.