Are we falling into the Virgo cluster
Abstract
Values of the Hubble constant for the proportionality between velocity and distance of distant galaxies, derived from data of 25 groups and clusters in the redshift range 200 to 7000 km/sec, are presented. It is shown by the redshift-distance relations of these clusters that the derived Hubble constant from the nearest cluster, Virgo, is 15 km/sec/Mpc less than those derived from farther clusters in the 20-95 Mpc range. An infall velocity value of 232 + or - 31 km/sec is derived if the observed difference in the Hubble constant with distance and direction is considered as being due to an infall motion of the Local Group toward the Virgo cluster. The derivation for the Hubble constant using the farther groups and clusters is 75 + or - 2.5 km/sec/Mpc.
- Publication:
-
Publications of the Astronomical Society of Australia
- Pub Date:
- 1981
- DOI:
- Bibcode:
- 1981PASA....4..172V
- Keywords:
-
- Astrometry;
- Galactic Clusters;
- Hubble Constant;
- Red Shift;
- Virgo Galactic Cluster;
- Astrophysics