The universal rotation curve of spiral galaxies – II. The dark matter distribution out to the virial radius |
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| Authors: | P Salucci A Lapi C Tonini G Gentile I Yegorova U Klein |
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| Institution: | SISSA International School for Advanced Studies, via Beirut 4, I–34013 Trieste, Italy;University of New Mexico, Department of Physics and Astronomy, 800 Yale Blvd NE, Albuquerque, NM 87131, USA;Argelander-Institut für Astronomie, Auf dem Hügel 71, D–53121 Bonn, Germany |
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| Abstract: | In the current ΛCDM cosmological scenario, N -body simulations provide us with a universal mass profile, and consequently a universal equilibrium circular velocity of the virialized objects, as galaxies. In this paper we obtain, by combining kinematical data of their inner regions with global observational properties, the universal rotation curve of disc galaxies and the corresponding mass distribution out to their virial radius. This curve extends the results of Paper I, concerning the inner luminous regions of Sb–Im spirals, out to the edge of the galaxy haloes. |
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| Keywords: | galaxies: formation galaxies: haloes galaxies: kinematics and dynamics dark matter |
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