Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-10-21
Astron. Astrophys. 351, 827-833 (1999)
Astronomy and Astrophysics
Astrophysics
7 pages, 7 ps-figures. A&A Document Class V4.03. Astronomy & Astrophysics, accepted 29.9.1999
Scientific paper
A 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.
Ekholm Timo
Fouque' Pascal
Lanoix P.
Paturel Georges
Teerikorpi Pekka
No associations
LandOfFree
Investigations of the Local Supercluster Velocity Field II. A study using Tolman-Bondi solution and galaxies with accurate distances from the Cepheid PL-relation 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 Investigations of the Local Supercluster Velocity Field II. A study using Tolman-Bondi solution and galaxies with accurate distances from the Cepheid PL-relation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Investigations of the Local Supercluster Velocity Field II. A study using Tolman-Bondi solution and galaxies with accurate distances from the Cepheid PL-relation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-249709