Dark-to-luminous properties of early type galaxies

Details Dark-to-luminous properties of early type galaxies Dark-to-luminous properties of early type galaxies

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004bdmh.confe..67n&link_type=abstract

"Proceedings of "Baryons in Dark Matter Halos". Novigrad, Croatia, 5-9 Oct 2004. Editors: R. Dettmar, U. Klein, P. Salucci. Publ

Physics

Scientific paper

In a sample of early-type galaxies we have found a correlation between the mass-to-light ratios (M L) gradients, ∇ ϒ, and the properties of their light distribution, in particular with their luminosity. Brightest galaxies appear the most dark-matter dominated. We discuss whether such a trend is expected in the ΛCDM framework. We conclude that the gradients in most of the brightest galaxies may fit in well with the ΛCDM predictions, but that there is also a population of fainter galaxies whose gradients are so low as to imply an unreasonably high star formation efficiency ɛSF

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