A Universal Density Profile for Dark and Luminous Matter?

Details A Universal Density Profile for Dark and Luminous Matter? A Universal Density Profile for Dark and Luminous Matter?

2005-02-24

arxiv.org/abs/astro-ph/0502515v1

Astrophys.J. 624 (2005) L85-L88

Astronomy and Astrophysics

Astrophysics

4 pages

Scientific paper

10.1086/430636

We explore similarities in the luminosity distribution of early type galaxies and the mass profiles of LCDM halos. The spatial structure of these systems may be accurately described by a simple law where the logarithmic slope of the projected density is a power law of radius; the Sersic law. We show that this law provides a significantly better fit than a three-parameter generalization of the NFW profile and derive the best-fitting Sersic parameters for a set of high-resolution LCDM halos spanning a wide range in mass. The mean Sersic n values are 3.0 for dwarf- and galaxy-sized halos and 2.4 for cluster-sized halos, similar to the values that characterize luminous elliptical galaxies. We discuss possible reasons why the same law should describe dark and luminous systems that span a range of over seven decades in mass.

Affiliated with

Also associated with

No associations

Rating

A Universal Density Profile for Dark and Luminous Matter? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A Universal Density Profile for Dark and Luminous Matter?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Universal Density Profile for Dark and Luminous Matter? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-235035