Virgo supercluster and the mean mass density of the Universe
Journal Article
·
· Astrophys. J., Lett. Ed.; (United States)
Recent measurements of the anisotropy of the microwave background radiation of the local Hubble flow suggest that the local group of galaxies has a motion of 300--500 km s/sup -1/ directed toward Virgo. If this velocity is generated by the Virgo supercluster, it provides a powerful test of the cosmological parameter ..cap omega... Using a catalog of redshift data complete to m/sub b/=14.0, we have computed the mean overdensity delta-bar toward the Virgo cluster to be approx.2.0 +- 0.3. When this result is combined with a nonlinear spherically symmetric flow model around Virgo, we derive ..cap omega.. approx. = 0.4 +- 0.1. Thus the measured mass-to-light ratio of the universe continues to rise with increasing scale size of measurement.
- Research Organization:
- Harvard-Smithsonian Center for Astrophysics
- OSTI ID:
- 5071457
- Journal Information:
- Astrophys. J., Lett. Ed.; (United States), Journal Name: Astrophys. J., Lett. Ed.; (United States) Vol. 238:3; ISSN AJLEA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Dynamics of superclusters: initial determination of the mass density of the universe at large scales
Survey of galaxy redshifts. III. The density field and the induced gravity field
Is the local supercluster a physical association
Journal Article
·
Tue Apr 14 23:00:00 EST 1981
· Astrophys. J., Lett. Ed.; (United States)
·
OSTI ID:6192143
Survey of galaxy redshifts. III. The density field and the induced gravity field
Journal Article
·
Sun Mar 14 23:00:00 EST 1982
· Astrophys. J.; (United States)
·
OSTI ID:5169498
Is the local supercluster a physical association
Journal Article
·
Wed Dec 31 23:00:00 EST 1975
· Astrophys. J., v. 203, no. 1, pp. 23-32
·
OSTI ID:4029149