The Hubble diagram for nuclear magnitudes of cluster galaxies

Details The Hubble diagram for nuclear magnitudes of cluster galaxies The Hubble diagram for nuclear magnitudes of cluster galaxies

Jan 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...203....6w&link_type=abstract

Astrophysical Journal, vol. 203, Jan. 1, 1976, pt. 1, p. 6-13. NSF-supported research.

Astronomy and Astrophysics

Astrophysics

32

Astronomical Photometry, Galactic Clusters, Galactic Nuclei, Hubble Diagram, Luminous Intensity, Cosmology, Electrophotometry, Galaxies, Red Shift, Tables (Data)

Scientific paper

Luminosities within central diameters of about 5 kpc (defined as the nuclear magnitudes) are given for the 10 brightest galaxies in each of nine rich clusters. Corrections required to use these magnitudes as relative distance indicators are discussed. The resulting Hubble diagram shows no evidence for significant non-Hubble velocities for cluster redshifts between 1000 km/s and 11,000 km/s. If the mean magnitudes of the five brightest nuclei in each cluster are considered, the deviation of the magnitude dispersion from the mean Hubble line is only 0.15 mag, and the deviation of the dispersion in the logarithm of the cluster redshift is 0.029.

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