Thick Disks in Other Galaxies

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

Thick disks are interesting because they have the potential to tell us about the history of galaxy disks. In the Milky Way, the oldest disk stars belong to the thick disk, suggesting that in our Galaxy at any rate, thick disk formation occurred very early in its disk history. Also, there is good evidence from n-body simulations that the accretion and destruction of a small satellite by a disk galaxy can form a thick disk. I will present new data on thick disks in several nearby edge-on disk galaxies (from deep CCD surface photometry) and discuss their properties in the context of formation models.

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