The peculiar velocity field in the Perseus-Pisces supercluster

Results are reported from a program to study peculiar motions of galaxies in the Per-Psc supercluster. The data set consists of newly obtained CCD photometry and published 21-cm line widths for 320 spiral galaxies. The peculiar velocities of these objects are estimated using the Tully-Fisher relatio...

Full description

Saved in:
Bibliographic Details
Published inThe Astrophysical journal Vol. 351; p. L5
Main Author Willick, Jeffrey A.
Format Journal Article
LanguageEnglish
Published Legacy CDMS 01.03.1990
Subjects
640105 - Astrophysics & Cosmology- Galaxies
Astrophysics
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CONFIGURATION
GALAXY CLUSTERS
GRAVITATION
MECHANICS
PHOTOMETRY
RADIAL VELOCITY
RED SHIFT
SPIRAL CONFIGURATION
VELOCITY
Online AccessGet full text

Cover

More Information
Summary:Results are reported from a program to study peculiar motions of galaxies in the Per-Psc supercluster. The data set consists of newly obtained CCD photometry and published 21-cm line widths for 320 spiral galaxies. The peculiar velocities of these objects are estimated using the Tully-Fisher relation, calibrated with respect to an independent sample of cluster galaxies. Analysis shows that the principal feature of the velocity field in the Per-Psc region is a coherent streaming toward the Local Group. Nearly all the galaxies well in the foreground (cz less than about 2000 km/sec) have negtive peculiar velocities of amplitude about 1000 km/sec. A great majority of objects in the background of the supercluster, out to redshifts of about 7000 km/sec, also have very large negative peculiar velocities. The supercluster ridge itself, at a redshift or about 5000 km/sec, appears to consist of positive and negative peculiar-velocity groups of galaxies, but with negative peculiar velocities predominating both in amplitude and in number of objects involved.
Bibliography:CDMS
Legacy CDMS
ISSN:0004-637X
1538-4357
DOI:10.1086/185666