Core Kinematics in Nearby Giant Spiral Galaxies

Details Core Kinematics in Nearby Giant Spiral Galaxies Core Kinematics in Nearby Giant Spiral Galaxies

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000noao.prop..451w&link_type=abstract

NOAO Proposal ID #2000B-0451

Computer Science

Scientific paper

We propose to carry out integral-field spectroscopy of the stellar cores in a selection of nearby giant spiral galaxies, using the WIYN 3.5- m telescope, DensePak fiber array, and Bench spectrograph. The resulting spectra will be analyzed to derive maps of stellar radial velocity and velocity dispersion in the host galaxies. Previous observations with this system has shown that it effectively and efficiently yields kinematic maps of galaxy cores at distances out to the Virgo Cluster. Here, we propose to concentrate on nearby unclustered giant spiral galaxies, in an effort to evaluate the balance of rotational and dispersive motions across the Hubble types. We will concentrate on low-inclination galaxies, whose velocity dispersions are more easily mapped. The kinematics of young and old stellar populations will be decomposed by separately analyzing the distinct features which these stellar groups produce in the resulting spectra. In this way, we will evaluate which age groups are most closely associated with rotational, dispersive, and multiple-core motions -- and how these kinematic properties trend with Hubble type.

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