Dynamics in Galaxy Halos

Details Dynamics in Galaxy Halos Dynamics in Galaxy Halos

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006rmxac..26r.198r&link_type=abstract

XI IAU Regional Latin American Meeting of Astronomy (Eds. L. Infante & M. Rubio) Revista Mexicana de Astronomía y Astrofísica (S

Astronomy and Astrophysics

Astronomy

Scientific paper

The outskirts of galaxies offer crucial clues about their formation history. There are clear predictions in the λCDM paradigm for the distribution of mass, angular momentum, and orbit types in galaxy halos. I present work from several interrelated programs to study the dynamics of nearby galaxy halos--including a systematic survey of ordinary elliptical galaxies. The observational probes include X-ray emission and the kinematics of stars, planetary nebulae, and globular clusters. Initial results imply dark matter halos in L* galaxies with concentrations too low for λCDM, while in brighter galaxies, there appears to be too much dark matter for the MOND gravitational theory.

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