Abstract
USING data for the brightest cluster galaxies, we here consider whether any anisotropy exists in the angular diameter–redshift relationship. This is in response to the finding of Rubin et al.1, who described a ‘curious’ distribution of radial velocities for ScI type galaxies having apparent magnitudes m in the range 14 < m < 15. For two distinct regions of sky, the mean radial velocity for these galaxies differs by ∼ 1,400 km s−1; the corresponding mean apparent magnitude differs by ∼ 0 mag, compared with the difference of 0.5 mag expected on the basis of this velocity difference. They tentatively concluded that the Hubble parameter H is not isotropic.
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EVANS, A., HART, D. No anisotropy in angular diameter–redshift relationship. Nature 259, 468–469 (1976). https://doi.org/10.1038/259468a0
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DOI: https://doi.org/10.1038/259468a0
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