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Elliptical Galaxy Halo Massesfrom Internal Kinematics

Published online by Cambridge University Press:  19 May 2006

G.A. Mamon ,
F. Combes ,
C. Deffayet ,
B. Fort  and
A.J. Romanowsky
A.J. Romanowsky*
Affiliation:
Departamento de Física, Universidad de Concepción, Casilla 160-C, Concepción, Chile
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Abstract

The halo masses of nearby individual elliptical galaxiescan be estimated by using the kinematics of their stars, planetary nebulae, and globularclusters–ideally in combination.With currently improving coverage of galaxies of ordinary luminosities and morphologies,systematic trends may be identified.Bright, boxy ellipticals show strong signatures of dark matter,while faint, disky ones typically do not.The former result is problematic for the MOND theory of gravity, and the latter is a challenge to explain in theΛCDM paradigm of galaxy formation.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 20: Mass Profiles and Shapes of Cosmological Structures , 2006 , pp. 119 - 126
Copyright
© EAS, EDP Sciences, 2006

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