Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....71...19p&link_type=abstract
Astronomy and Astrophysics, vol. 71, no. 1-2, Jan. 1979, p. 19-28. In French.
Astronomy and Astrophysics
Astrophysics
7
Hubble Diagram, Luminous Intensity, Radial Velocity, Spiral Galaxies, Astrometry, Diameters, Distance, Statistical Correlation
Scientific paper
A diameter-luminosity relation has been determined which makes it possible to obtain distance moduli for spiral galaxies on the basis of diameters at the 25 mag B/sq arc sec level and Holmberg diameters. An absolute calibration (determination of K) is made using distance moduli from primary and secondary indicators. The diameter-luminosity relation is thus used to study the Hubble constant. For 281 spiral galaxies with known radial velocity, it is shown that there is a significant correlation between distance and radial velocity and that this relation does not disagree with Hubble's classical formulation over the range 5 log V(r) approximately equal to 13.5-18.0.
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