Journal article
HALO ORBITS IN COSMOLOGICAL DISK GALAXIES: TRACERS OF FORMATION HISTORY
Abstract
We analyze the orbits of stars and dark matter particles in the halo of a disk galaxy formed in a cosmological hydrodynamical simulation. The halo is oblate within the inner ∼20 kpc and triaxial beyond this radius. About 43% of orbits are short axis tubes—the rest belong to orbit families that characterize triaxial potentials (boxes, long-axis tubes and chaotic orbits), but their shapes are close to axisymmetric. We find no evidence that the …
Authors
Valluri M; Debattista VP; Stinson GS; Bailin J; Quinn TR; Couchman HMP; Wadsley J
Journal
The Astrophysical Journal, Vol. 767, No. 1,
Publisher
American Astronomical Society
Publication Date
April 10, 2013
DOI
10.1088/0004-637x/767/1/93
ISSN
0004-637X