NGC 5128, J.L. Sersic, Atlas de Galaxias Australes, 1968
NGC 253, J.L. Sersic, Atlas de Galaxias Australes, 1968
1st Extragalactic Astronomy Meeting, 1975, J.L. Sersic, T.G. Catellanos, P. Kaufman
NGC 2442, J.L. Sersic, Atlas de Galaxias Australes, 1968
2nd Extragalactic Astronomy Meeting, 1987
NGC 2997, J.L. Sersic, Atlas de Galaxias Australes, 1968
3rd Extragalactic Astronomy Meeting, 1996
NGC 55, J.L. Sersic, Atlas de Galaxias Australes, 1968

Andrea Biviano

 Italy – INAF-Osservatorio Astronomico di Trieste

The dark matter density profile of clusters of galaxies

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Abstract: Dark matter (DM) has been originally discovered in clusters of galaxies by Zwicky (1933). These systems currently remain excellent laboratories for probing DM properties through gravitational lensing, and the dynamical equilibrium of cluster visible components (intra-cluster plasma and galaxies). Comparison of the shape of cluster mass density profiles with predictions from cosmological simulations are used to constrain the properties of DM. Particularly useful in this respect is the determination of the inner slope (gammaDM) of the dark matter (DM) density profile. Cold DM cosmological simulations predict gammaDM~1. While significantly flatter slopes have been obtained in the literature, our new results, based on the CLASH-VLT data with MUSE follow-up observations, appear to reconcile the observational determinations of gammaDM with predictions from LambdaCDM cosmological simulations.

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