Stellar dynamical evidence for dark halos in elliptical galaxies - The case of NGC 4472, IC 4296, and NGC 7144

Details Stellar dynamical evidence for dark halos in elliptical galaxies - The case of NGC 4472, IC 4296, and NGC 7144 Stellar dynamical evidence for dark halos in elliptical galaxies - The case of NGC 4472, IC 4296, and NGC 7144

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...403..567s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 403, no. 2, p. 567-572.

Physics

81

Dark Matter, Elliptical Galaxies, Galactic Halos, Stellar Physics, Astronomical Models, Astronomical Spectroscopy, Dynamic Models, Stellar Rotation

Scientific paper

Long-slit spectroscopy has been used to obtain extended and accurate major-axis kinematic profiles and line-strength gradients for the three elliptical galaxies NGC 4472, IC 4296, and NGC 7144. In the last of these, the stellar rotation curve and velocity dispersion profile extend to 75 arcsec from the center. The either flat or slowly increasing velocity dispersion profiles of these galaxies imply the dominant role of massive dark halos in their dynamics.

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