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Abstract

Abstract

[*] Dark matter in elliptical galaxies Carollo C.M., de Zeeuw P.T., van der Marel R.P., Danziger I.J., Qian E.E. ApJ Letters, 441, L25-L28, 1995 © 1995. The American Astronomical Society. All Rights Reserved. Accepted journal version (.ps 392 kb) (.ps.gz 120 kb) Scanned paper from ADS (.ps 328 kb) (.ps.gz 272 kb)

[*] Citations to this paper in the ADS

We present measurements of the shape of the stellar line-of-sight velocity distribution out to two effective radii along the major axes of the four elliptical galaxies NGC 2434, 2663, 3706, and 5018. The velocity dispersion profiles are flat or decline gently with radius. We compare the data to the predictions of f=f(E,L_z) axisymmetric models with and without dark matter. Strong tangential anisotropy is ruled out at large radii. We conclude from our measurements that massive dark halos must be present in three of the four galaxies, while for the fourth galaxy (NGC 2663) the case is inconclusive.

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Last modified December 8, 1998.
Roeland van der Marel, marel@stsci.edu.
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