Back to Volume
Paper: WIYN Integral-Field Kinematics of Disk Galaxies
Volume: 275, Disks of Galaxies: Kinematics, Dynamics and Perturbations
Page: 43
Authors: Bershady, M.; Verheijen, M.; Andersen, D.
Abstract: We have completed a new fiber array, SparsePak, optimized for low-surface-brightness studies of extended sources on the WIYN telescope. We are now using this array as a measuring engine of velocity and velocity-dispersion fields of stars and ionized gas in disk galaxies from high to low surface-brightness. Here we present commissioning data on the velocity ellipsoids, surface densities and mass-to-light ratios in two blue, high surface-brightness, yet small disks. If our preliminary results survive further observation and more sophisticated analysis, then NGC 3949 has σzR>> 1, implying strong vertical heating, while NGC 3982's disk is substantially sub-maximal. These galaxies are strikingly unlike the Milky Way, and yet would be seen more easily at high redshift.
Back to Volume