Large-scale peculiar velocity fields in superclusters of galaxies

Details Large-scale peculiar velocity fields in superclusters of galaxies Large-scale peculiar velocity fields in superclusters of galaxies

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...382...19g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 382, Nov. 20, 1991, p. 19-25.

Astronomy and Astrophysics

Astrophysics

15

Galactic Clusters, H Lines, Velocity Distribution, Astronomical Catalogs, Calibrating, Charge Coupled Devices, Error Analysis

Scientific paper

The Tully-Fisher relation is used to derive distances of 262 galaxies in seven clusters. Care is taken to reduce possible causes of error in the distance determination and to evaluate sources of scatter in the distance-velocity relation. The scatter in Virgo, A262 (and possibly in the Coma and Hercules superclusters) is real and is evidence of large-scale (50 Mpc) peculiar velocity fields. In the Virgo region the existence of background galaxies infalling toward the cluster is confirmed and evidence is found for infalling foreground objects. The Cancer cluster is confirmed to be an unbound collection of groups. The Hubble relation is linear from 0 to 13,000 km/s with H(0) = 90 +/-17 km/s Mpc.

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