Distance and Dynamical Mass of the Virgo Cluster
Résumé
Tolman-Bondi-model and distances from the Tully-Fisher relation yield a distance to Virgo cluster 20-24 Mpc. Comparison with Virgo core galaxies (Federspielet al.) seems to favour 24 Mpc. High quality distances from the extragalactic Cepheid PL-relation support 21 Mpc, which is our preferred value (Ekholm et al., \cite{E00}) . The Virgo cluster mass is 1.5-2 times larger than the Virgo virial mass (Tully & Shaya ). We find a steeper density profile for the gravitating matter (2.5-2.85) than for luminous matter (2.3).
