Is there a unique relation between absolute (blue) luminosity and total 21 CM linewidth of disk galaxies?

Details Is there a unique relation between absolute (blue) luminosity and total 21 CM linewidth of disk galaxies? Is there a unique relation between absolute (blue) luminosity and total 21 CM linewidth of disk galaxies?

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...132..253r&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 132, no. 2, March 1984, p. 253-264.

Astronomy and Astrophysics

Astronomy

89

Astrometry, Disk Galaxies, Galactic Radiation, Luminosity, Radio Astronomy, Centimeter Waves, Correction, Correlation Coefficients, Distance, Virgo Galactic Cluster

Scientific paper

Twenty-one-cm line observations for a sample of 130 galaxies in nearby groups and in the Virgo cluster were used together with well-established values from the literature for a discussion of the blue Tully-Fisher relation (TFR). Known distances of galaxies from the local group and the M81 group were used to calibrate the zeropoint of the TFR. Within the observational errors the slope of the TFR was the same for the whole sample, and was only weakly dependent on: (1) the correction used for internal extinction in the galaxies and (2) the inclusion of a galaxian type dependence of the TFR. The correlation coefficients between the slope of the TFR and the distance moduli are significant and always positive; distances derived via the TFR do depend on the adopted slope. Known H I profiles of Virgo cluster galaxies were used to check for differences in the TFR between group and cluster galaxies. The resulting distance of the Virgo cluster is 24.0 + or - 3.3 Mpc.

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