The type-redshift relation in the Vaucouleurs' groups of galaxies

Details The type-redshift relation in the Vaucouleurs' groups of galaxies The type-redshift relation in the Vaucouleurs' groups of galaxies

Dec 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976a%26a....53..389j&link_type=abstract

Astronomy and Astrophysics, vol. 53, no. 3, Dec. 1976, p. 389-396.

Astronomy and Astrophysics

Astrophysics

12

Astronomical Spectroscopy, Galactic Clusters, Red Shift, Spectrum Analysis, Spiral Galaxies, Absorption Spectra, Emission Spectra, Error Analysis, Galactic Nuclei, Line Spectra, Radial Velocity

Scientific paper

The earlier result concerning the excess redshifts of Sb and Sc galaxies is confirmed in the Vaucouleurs' (1965) groups, especially for Sc and intermediate, Sbc, types. The results are at a 3-sigma level of significance. When a Sbc or Sc spiral is the main galaxy in a group, the negative z-residuals earlier found to be favored by main galaxies do not dominate. The type dependence of redshift exists both for optical and 21-cm line redshifts. Observational errors are discussed, showing that these are not the probable reason for the type dependence. Other kinds of interpretation are also discussed. Finally, a tentative model of the effect has been outlined which also explains certain other redshift features.

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