AAS 198th Meeting, June 2001
Session 54. Galaxy Evolution and Surveys
Display, Wednesday, June 6, 2001, 10:00am-7:00pm, Exhibit Hall

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[54.02] Unraveling the Hybrid Stellar Velocity Fields in the Central Kpc of the Ringed-Barred Spiral Galaxies NGC 3351 and NGC 4736

E. J. Murphy (Tufts Univeristy), W. H. Waller (Tufts University), J. D. P. Kenney (Yale University)

We report on out continuing analysis of the line of sight velocity fields in the cores of two ringed-barred spiral galaxies. These velocity fields are based on integral field spectra obtained with the WIYN 3.5 meter telescopes DensePak multifiber array and Bench spectrograph. Our aim is to decompose the hybrid stellar velocity fields into their circular, streaming, and dispersive components.

We find that circular rotation dominates the kinematic energy outside a radius of 200 pc, indicating dick dominated galaxy cores. Maps of the non-circular residual velocities indicate streaming motions that are approximately 10 percent of the circular motion. Variations in the streaming and dispersive motions are presented and discussed.

E. J. M. acknowledges support from Tufts University, the National Science Foundation, and Sigma Xi, the Scientific Research Society.

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