Berlin 2005 – wissenschaftliches Programm

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EP: Extraterrestrische Physik

EP 12: Astrophysik

EP 12.4: Vortrag

Dienstag, 8. März 2005, 15:00–15:15, TU BH349

Multi-colour analysis of NGC 5907 — •Andreas Just — Astronomisches Rechen-Institut, Moenchhofstr. 12-14, 69120 Heidelberg

The vertical luminosity and colour profiles of edge-on galaxies can be used to reconstruct the dynamical evolution and the star formation history of the disc. We use deep photometry in U,B,V,R, and I band to analyze the composition in age of the stellar component as a function of vertical height. With self-consistent disc models including the gravitational potential of the gas component and the dark matter halo and with dust extinction we compute for a large variety of star formation histories and dynamical heating functions the vertical luminosity and colour profiles. The multi-colour analysis allows strong constraints on the stellar disc evolution and also on inclination and on the dust component. The results are compared to the evolution of the solar neighbourhood.