Collapse of Lyman Alpha Clouds to Galaxies with Flat Rotation Curves

Details Collapse of Lyman Alpha Clouds to Galaxies with Flat Rotation Curves Collapse of Lyman Alpha Clouds to Galaxies with Flat Rotation Curves

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..apr.y6005c&link_type=abstract

American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As

Astronomy and Astrophysics

Astrophysics

Scientific paper

We hypothesize that a lyman alpha cloud does not need to transport angular momentum outward as it collapses to form a galaxy with a flat rotation curve, M_interior ∝ R. A cloud with uniform density and solid-body rotation naturally has the angular momentum distribution of a disk with a flat rotation curve, so the cloud should be able to collapse to a spiral galaxy while conserving the angular momentum and radial ordering of all mass elements. To test this hypothesis, we will use a simplified nbody + hydrodynamics code which can rigorously banish all transfer of angular momentum while still preserving the essential features of dissipative baryonic collapse.

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