Galaxy velocity dispersions using a cross-correlation method

Details Galaxy velocity dispersions using a cross-correlation method Galaxy velocity dispersions using a cross-correlation method

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...366...38d&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 366, Jan. 1, 1991, p. 38-49.

Statistics

Computation

40

Astronomical Spectroscopy, Computational Astrophysics, Cross Correlation, Galactic Evolution, Galactic Rotation, Emission Spectra, Galactic Nuclei, Galactic Structure, Giant Stars, K Stars, Velocity Distribution

Scientific paper

A cross-correlation method for measuring velocity dispersions, introduced by Tonry and Davis (1979) and used for measuring velocity dispersions for 350 elliptical galaxies, is modified. The resulting technique is used to tabulate central velocity dispersions for 79 additional early-type galaxies, and various tests of the effects of random and systematic errors are carried out to establish the accuracy of the results. A significant difference between the present cross-correlation technique and that proposed by Tonry and Davis is described.

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