The main goal of this work is to find the best-fitting galaxy model for the Milky Way by comparin... more The main goal of this work is to find the best-fitting galaxy model for the Milky Way by comparing 10 different models with observed star counts and colour distributions. The observational data are taken from the Basel High-Latitude (Basel)and the Sloan Digital Sky (SDSS) photometric field star Surveys, respectively. We develop a code to derive synthetic spectra, absolute and apparent magnitudes and colours for stars given by a galactic evolutionary model (3D chemodynamical code for the Milky Way by Samland & Gerhard (2003)). The model galaxies provide stellar masses, ages, chemical abundances, velocities and positions at an evolutionary time of 13.5 Gyr. By means of the spectrophotometric data (given in the libraries of stellar evolutionary tracks (Padova 1994) and synthetic stellar spectra (BaSeL 3.2)), we build synthetic colour-magnitude diagrams, star counts, and ageand metallicity distributions for a number of viewing directions and field sizes. Our intention is to first compar...
The main goal of this work is to find the best-fitting galaxy model for the Milky Way by comparin... more The main goal of this work is to find the best-fitting galaxy model for the Milky Way by comparing 10 different models with observed star counts and colour distributions. The observational data are taken from the Basel High-Latitude (Basel)and the Sloan Digital Sky (SDSS) photometric field star Surveys, respectively. We develop a code to derive synthetic spectra, absolute and apparent magnitudes and colours for stars given by a galactic evolutionary model (3D chemodynamical code for the Milky Way by Samland & Gerhard (2003)). The model galaxies provide stellar masses, ages, chemical abundances, velocities and positions at an evolutionary time of 13.5 Gyr. By means of the spectrophotometric data (given in the libraries of stellar evolutionary tracks (Padova 1994) and synthetic stellar spectra (BaSeL 3.2)), we build synthetic colour-magnitude diagrams, star counts, and ageand metallicity distributions for a number of viewing directions and field sizes. Our intention is to first compar...
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Papers by Karin Ammon