Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977ap%26ss..49...99j&link_type=abstract
Astrophysics and Space Science, vol. 49, no. 1, June 1977, p. 99-111.
Astronomy and Astrophysics
Astrophysics
2
Astronomical Catalogs, Compact Galaxies, Galactic Clusters, Galactic Structure, Quasars, Red Shift, Correlation, Velocity Distribution
Scientific paper
A possible physical relationship between intrinsic redshift and compactness is investigated using data on 82 compact galaxies with measured redshifts belonging to clusters, groups, or pairs that also include normal galaxies with measured redshifts. A mean residual redshift of +163 + or - 76 km/s is determined for the whole sample with a chance probability of 0.015, and it is noted that there is a high frequency of compact galaxies among those with a large discrepant redshift relative to the redshifts of other system members. A positive mean residual redshift is also indicated for relatively compact normal galaxies, positive correlations are observed between the residual magnitudes and symbolic residual velocities of compact galaxies, and it is shown that redshift is correlated with magnitude in groups and pairs of compact galaxies. When there is a color difference between components, the bluer component is generally found to have the larger redshift. The association of quasars with clusters and groups of galaxies is discussed, and some apparently real physical associations are suggested.
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