Back to Volume
Paper: Pattern Speed Measurements in Two Barred Galaxies
Volume: 249, The Central Kiloparsec of Starbursts and AGN: the La Palma Connection
Page: 78
Authors: Baker, A. J.; Schinnerer, E.; Scoville, N. Z.; Englmaier, P. P.; Tacconi, L. J.; Tacconi-Garman, L. E.; Thatte, N.
Abstract: Knowledge of the pattern speed in a barred galaxy is an important prerequisite for determining the radii of its dynamical resonances. Once identified, these can in turn be used to constrain models for nuclear fueling and secular evolution. Here, we present measurements of the pattern speeds in two barred galaxies---one direct (in NGC 1068, using the Tremaine--Weinberg method in the near infrared) and one indirect (in NGC 7479, using a fit to three-dimensional molecular emission-line data). We find good evidence that a configuration of dynamically decoupled ``bars within bars'' is present in each system. We thank ESO (and in particular, the User Support Group) for assistance with our service-mode observations of NGC 1068. We also acknowledge the scientific and technical staff at the Owens Valley Radio Observatory for making our observations possible. The CO (1 --> 0) data which were incorporated into our fitting for NGC 7479 were graciously provided by Susanne Hüttemeister and Susanne Aalto.
Back to Volume