Velocity Dispersions Across Bulge Types

Journal Article · Tue Jun 08 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3458497· OSTI ID:21366931

Fabricius, Maximilian; Bender, Ralf; Hopp, Ulrich ^[1]; Saglia, Roberto; Drory, Niv ^[2]; Fisher, David ^[3]

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1. University Observatory of the Ludwig-Maximilians University (LMU) (Germany)
2. Max-Planck Institute for Extraterrestrial Physics (MPE) (Germany)
3. Department of Astronomy, University of Texas at Austin (United States)

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 (sigma*), 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.

• OSTI ID: 21366931
• Journal Information: AIP Conference Proceedings, Vol. 1240, Issue 1; Conference: Workshop on hunting for the dark: The hidden side of galaxy formation, Qawra (Malta), 19-23 Oct 2009; Other Information: DOI: 10.1063/1.3458497; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
BRIGHTNESS
GALAXIES
RESOLUTION
SPECTRA
TELESCOPES
VELOCITY
OPTICAL PROPERTIES
PHYSICAL PROPERTIES