Formation of Galactic Disks

Details Formation of Galactic Disks Formation of Galactic Disks

2002-03-27

arxiv.org/abs/astro-ph/0203492v1

Astronomy and Astrophysics

Astrophysics

Invited review, to appear in The Dynamics, Structure and History of Galaxies (Kenneth Freeman 60th Birthday Conference), eds.

Scientific paper

We review progress in understanding the formation of galactic disks in the standard cosmogonic scenario involving gravitational clustering of baryons and dark matter and dissipative collapse of the baryons. This scenario accounts remarkably well for the observed properties of galactic disks if they have retained most of the specific angular momentum they acquired by tidal torques. Early simulations, which included cooling of the gas but not star formation and the associated feedback, indicated instead that most of the angular momentum of the baryons would be transferred to the dark matter. Recent simulations indicate that this angular-momentum problem can be solved partially, and in some cases entirely, by feedback and other effects.

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