Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...278..475b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 278, March 15, 1984, p. 475-485.
Astronomy and Astrophysics
Astronomy
59
Astrometry, Big Bang Cosmology, Red Shift, Spiral Galaxies, Astronomical Photometry, Diameters, Hubble Constant, Local Group (Astronomy), Radio Astronomy
Scientific paper
The authors have obtained H I spectra, optical photometry, and H-band photometry of a subsample of the Sandage-Tammann and Rubin et al. lists of distant Sc I galaxies. The final sample contains 20 galaxies in the velocity range 3000 - 13,500 km s-1. The infrared Tully-Fisher method is used to derive individual distances to these spiral galaxies. After applying a correction for Malmquist bias, the sample yields a Hubble ratio of 91±3 km s-1 Mpc-1. This value is in substantial agreement with an earlier value based on a sample of distant cluster spiral galaxies. The good agreement between the cluster and the Sc I sample strongly argues that environmental effects do not influence the slope of the spiral IR Tully-Fisher relation and that the zero point of the relation is universal. These data also provide further verification of significant infall motion of the Local Group toward Virgo.
Aaronson Marc
Bothun Gragory D.
Huchra John
Mould Jeremy
Schommer Bob
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