Dynamical Simulations of NGC 2523 and NGC 4245

Abstract

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.

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

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Cited by in corpus (7)

• New Colour-Mass to Light Relations: the role of the Asymptotic Giant Branch phase and of interstellar dust
• Rings and spirals in barred galaxies. III. Further comparisons and links to observations
• Pattern Speeds of Bars and Spiral Arms From H-alpha Velocity Fields
• Major structures of the inner Galaxy delineated by 6.7-GHz methanol masers
• On the Link Between Central Black Holes, Bar Dynamics, and Dark Matter Halos in Spiral Galaxies
• The structure of spiral galaxies: radial profiles in stellar Mass-to-Light ratio and the Dark Matter distribution
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