Samenvatting
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-2 | English |
|---|---|
| Pagina's | 43-46 |
| Status | Published - 1-dec.-2002 |
| Evenement | Disks of Galaxies: Kinematics, Dynamics and Peturbations, - San Francisco, California, United States Duur: 20-feb.-2015 → … |
Conference
| Conference | Disks of Galaxies: Kinematics, Dynamics and Peturbations, |
|---|---|
| Land/Regio | United States |
| Stad | San Francisco, California |
| Periode | 20/02/2015 → … |