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V. Hradecky (Harvard University), C. S. Kochanek (The Ohio State University), M. A. Pahre, M. A. Hartman, E. E. Falco, J. P. Huchra (Harvard-Smithsonian Center for Astrophysics)
We present the velocity function (VF) for a random sample of ~400 galaxies selected from the 2MASS galaxy catalog with near-infrared apparent magnitudes 10.50 \leq Ks \leq 11.25 mag. We obtained long-slit absorption-line (covering H\delta through NaD) and emission-line (centered on H\alpha) spectra along the major-axes of the target galaxies. We measure the rotation curves and velocity dispersions from the spectra for late- and early-type galaxies, respectively. We combine the kinematic properties with inclination angles derived from our near-infrared surface photometry to measure the VF. We compare our results to previous VF estimates that were derived from luminosity functions and kinematic relations constructed from inhomogeneous galaxy samples.
The author(s) of this abstract have provided an email address for comments about the abstract: vhradecky@cfa.harvard.edu
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Bulletin of the American Astronomical Society, 35#5
© 2003. The American Astronomical Soceity.