WIYN Integral-Field Kinematics of Disk Galaxies

M. Bershady, M. Verheijen, D. Andersen



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 σz/σR>> 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.
Originele taal-2English
StatusPublished - 1-dec-2002
EvenementDisks of Galaxies: Kinematics, Dynamics and Peturbations, - San Francisco, California, United States
Duur: 20-feb-2015 → …


ConferenceDisks of Galaxies: Kinematics, Dynamics and Peturbations,
Land/RegioUnited States
StadSan Francisco, California
Periode20/02/2015 → …

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