Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...254....8d&link_type=abstract
Astrophysical Journal, Part 1, vol. 254, Mar. 1, 1982, p. 8-15.
Astronomy and Astrophysics
Astronomy
22
Distance, Galactic Structure, Hubble Constant, Radio Sources (Astronomy), Spectral Line Width, Virgo Galactic Cluster, Galactic Rotation, Infrared Spectra, Line Spectra, Luminosity, Radial Velocity, Velocity Distribution
Scientific paper
Several methods are used to test the proposal that the slope of the Tully-Fisher (1977) equation is the same in the blue and IR bands, and that its zero point depends on morphological type. It is shown that the large sample of 21 cm line widths analyzed in Bottinelli et al. (1980) does not support the broad proposal that the slope of the Tully-Fisher relation is 10 in the blue band, and that its zero point is a rapidly-varying function of morphological type. The calibration employed in Bottinelli et al. (1980) is confirmed.
Bottinelli Lucette
Buta Ron
de Vaucouleurs Gerard
Gouguenheim Lucienne
Paturel Georges
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