Velocity Dispersions Across Bulge Types

Details Velocity Dispersions Across Bulge Types Velocity Dispersions Across Bulge Types

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1240..239f&link_type=abstract

HUNTING FOR THE DARK: THE HIDDEN SIDE OF GALAXY FORMATION. Edited by Victor P. Debattista and Cristina C. Popescu AIP Conferen

Mathematics

Logic

Spiral Galaxies, Brightness, Merging, Telescopes, Velocity, Spiral Galaxies, Magnitudes And Colors, Luminosities, Galaxy Mergers, Collisions, And Tidal Interactions, Ground-Based Ultraviolet, Optical And Infrared Telescopes, Velocity, Acceleration, And Rotation

Scientific paper

We present first results from a long-slit spectroscopic survey of bulge kinematics in local spiral galaxies. Our optical spectra were obtained at the Hobby-Eberly Telescope with the LRS spectrograph and have a velocity resolution of 45 km/s (σ*), which allows us to resolve the velocity dispersions in the bulge regions of most objects in our sample. We find that the velocity dispersion profiles in morphological classical bulge galaxies are always centrally peaked while the velocity dispersion of morphologically disk-like bulges stays relatively flat towards the center-once strongly barred galaxies are discarded.

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