Investigations of the Local Supercluster Velocity Field II. A study using Tolman-Bondi solution and galaxies with accurate distances from the Cepheid PL-relation

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dc.creatorEkholm, T.
dc.creatorLanoix, P.
dc.creatorTeerikorpi, P.
dc.creatorPaturel, G.
dc.creatorFouque, P.
dc.date1999-10-21
dc.date.accessioned2026-07-07T02:33:58Z
dc.date.available2026-07-07T02:33:58Z
dc.descriptionA sample of 32 galaxies with accurate distance moduli from the Cepheid PL-relation (Lanoix 1999) has been used to study the dynamical behaviour of the Local (Virgo) supercluster. We used analytical Tolman-Bondi (TB) solutions for a spherically symmetric density excess embedded in the Einstein-deSitter universe (q_0=0.5). Using 12 galaxies within Theta=30 degr from the centre we found a mass estimate of 1.62M_virial for the Virgo cluster. This agrees with the finding of Teerikorpi et al. (1992} that TB-estimate may be larger than virial mass estimate from Tully & Shaya (1984). Our conclusions do not critically depend on our primary choice of the global H_0=57 km/s/Mpc established from SNe Ia (Lanoix 1999). The remaining galaxies outside Virgo region do not disagree with this value. Finally, we also found a TB-solution with the H_0 and q_0 cited yielding exactly one virial mass for the Virgo cluster.
dc.description7 pages, 7 ps-figures. A&A Document Class V4.03. Astronomy & Astrophysics, accepted 29.9.1999
dc.identifierhttps://arxiv.org/abs/astro-ph/9910387
dc.identifierhttp://arxiv.org/abs/astro-ph/9910387
dc.identifierAstron. Astrophys. 351, 827-833 (1999)
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/15062
dc.subjectAstrophysics
dc.titleInvestigations of the Local Supercluster Velocity Field II. A study using Tolman-Bondi solution and galaxies with accurate distances from the Cepheid PL-relation
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