Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.229...53j&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 229, Nov. 1, 1987, p. 53-59.
Astronomy and Astrophysics
Astronomy
17
Cosmology, Elliptical Galaxies, Galactic Clusters, Sky Surveys (Astronomy), Anisotropy, Infrared Sources (Astronomy), Local Group (Astronomy), Relic Radiation, Velocity Distribution
Scientific paper
Large-scale deviations from isotropic Hubble flow are investigated using first-ranked cluster elliptical galaxies. The sky coverage of the sample used precludes a general solution for a dipole anisotropy, but it is well suited to investigation of the component of any motion of these galaxies along a direction defined by the dipole anisotropy in the 2.7-K cosmic background radiation. The cluster ellipticals have a velocity component along this direction of approximately 600 km/s. This result is consistent with the large-scale streaming found in a reinvestigation of the Rubin et al. (1976) spiral galaxies in the infrared (Collins et al., 1986), and that found for a different sample of elliptical galaxies by Dressler et al. (1987). However, the recent result of Aaronson et al. (1986), who found a Local Group motion consistent with their sample of 10 clusters being at rest with respect to the cosmic background radiation, is not confirmed.
Collins Charles Aloysius
James Phil A.
Joseph Robert D.
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