Elliptical Galaxy Halo Masses from Internal Kinematics

Details Elliptical Galaxy Halo Masses from Internal Kinematics Elliptical Galaxy Halo Masses from Internal Kinematics

2005-10-06

arxiv.org/abs/astro-ph/0510183v2

Astronomy and Astrophysics

Astrophysics

8 pages, 8 figs. Invited review contribution in Proceedings of XXIst IAP Colloquium, "Mass Profiles & Shapes of Cosmological S

Scientific paper

10.1051/eas:2006057

The halo masses of nearby individual elliptical galaxies can be estimated by using the kinematics of their stars, planetary nebulae, and globular clusters -- 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 the LCDM paradigm of galaxy formation.

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