Dynamical Simulations of NGC 2523 and NGC 4245

Details Dynamical Simulations of NGC 2523 and NGC 4245 Dynamical Simulations of NGC 2523 and NGC 4245

2008-09-15

arxiv.org/abs/0809.2478v1

Astronomy and Astrophysics

Astrophysics

29 pages, 3 tables, 13 figures. Accepted for publication in The Astronomical Journal

Scientific paper

10.1088/0004-6256/137/1/19

We present dynamical simulations of NGC 2523 and NGC 4245, two barred galaxies (types SB(r)b and SB(r)0/a, respectively) with prominent inner rings. Our goal is to estimate the bar pattern speeds in these galaxies by matching a sticky-particle simulation to the $B$-band morphology, using near-infrared $K_s$-band images to define the gravitational potentials. We compare the pattern speeds derived by this method with those derived in our previous paper using the well-known Tremaine-Weinberg continuity equation method. The inner rings in these galaxies, which are likely to be resonance features, help to constrain the dynamical models. We find that both methods give the same pattern speeds within the errors.

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