Stellar versus gaseous kinematics in E and SO galaxies

Details Stellar versus gaseous kinematics in E and SO galaxies Stellar versus gaseous kinematics in E and SO galaxies

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984aj.....89..356b&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 89, March 1984, p. 356-364.

Astronomy and Astrophysics

Astronomy

68

Astronomical Spectroscopy, Elliptical Galaxies, Gas Dynamics, Kinematics, Radial Velocity, Absorption Spectra, Data Reduction, Emission Spectra, Stellar Motions, Velocity Distribution

Scientific paper

Velocity dispersion profiles and radial velocity curves have been derived for three E-S0 galaxies, namely NGC 1052, NGC 3998, and NGC 4125, both from the emission and the absorption lines. In addition central values of the gas and stellar velocity dispersion are determined for NGC 2749. The gas velocity dispersion is systematically lower than that of the stars by 40 percent-95 percent. There is some indication of similarity in the shape of the gas and stellar velocity dispersion profiles. The rotational properties of gas and stars appear to be strongly decoupled. The possibilities that gas in ellipticals is of internal or external origin are discussed.

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