Journal
ASTROPHYSICAL JOURNAL
Volume 624, Issue 2, Pages L85-L88Publisher
IOP Publishing Ltd
DOI: 10.1086/430636
Keywords
dark matter; galaxies : elliptical and lenticular, cD; galaxies : structure
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We explore similarities in the luminosity distribution of early-type galaxies and the mass profiles of Lambda CDM halos. The spatial structure of these systems may be accurately described by a simple law in which the logarithmic slope of the density varies as a power of the radius: the Sersic law. We show that this law provides a significantly better fit to a set of high-resolution Lambda CDM halos than a three-parameter generalization of the Navarro-Frenk-White profile. We discuss possible reasons why the same law should describe dark and luminous systems that span a range of over 7 decades in mass.
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