The Galaxy as a fundamental standard for extragalactic distances. II - A first critical test of long and short scales using the Tully-Fisher relations

Details The Galaxy as a fundamental standard for extragalactic distances. II - A first critical test of long and short scales using the Tully-Fisher relations The Galaxy as a fundamental standard for extragalactic distances. II - A first critical test of long and short scales using the Tully-Fisher relations

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982crasb.294..903d&link_type=abstract

Academie des Sciences (Paris), Comptes Rendus, Serie II - Mechanique, Physique, Chimie, Sciences de l'Univers, Sciences de la Te

Physics

3

Celestial Reference Systems, Galactic Rotation, Milky Way Galaxy, Correlation, Disk Galaxies, Distance, Hubble Constant, Magnitude, Virgo Galactic Cluster

Scientific paper

The linear correlations between absolute magnitude and maximal rotational speed are employed to construct scales of extragalactic distances. The width of the 21 cm blue band yields the total magnitude, which is corrected for effects of inclination and velocity dispersion. Comparison with previous values obtained for 11 galaxies in the Local Group shows good agreement for the short scale, which requires only 5 percent correction. Errors of 12-15 percent in magnitude were found on the long scale. When applied to the Virgo cluster, the errors show extremely high levels of significance.

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