The dependence of the Tully-Fisher relation on morphological type

Details The dependence of the Tully-Fisher relation on morphological type The dependence of the Tully-Fisher relation on morphological type

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...309..512g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 309, Oct. 15, 1986, p. 512-521.

Mathematics

Logic

26

Galactic Rotation, Galactic Structure, Spiral Galaxies, Angular Velocity, Brightness Distribution, Hubble Constant, Mass To Light Ratios, Velocity Distribution

Scientific paper

A sample of 124 galaxies with Hubble types Sab-Sb and Scd-Sd is analyzed to investigate the dependence of the B band Tully-Fisher relation on morphological type, together with the apparent Hubble rate variation with velocities reported in a previous paper. From that sample, the following conclusions are derived: (1) the offset of the zero-point of the Tully-Fisher relation in the B band for, respectively, the Sab-Sb and the Scd-Sd galaxies varies from about 0.5 mag to about 1.6 mag as the calibrating slope varies from 5 to 10; and (2) for a given 'class' (Sab-Sb or Scd-Sd) the dispersion of the Tully-Fisher relation increases from about 0.5 mag to about 0.75 mag as the slope varies from 5 to 10.

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