The Correlation Between Galaxy HI Linewidths and K ′ Luminosities

  title={The Correlation Between Galaxy HI Linewidths and K ′ Luminosities},
  author={Barry Rothberg and W. Saunders and Richard Brent Tully and Peter L. Witchalls},
The relationship between galaxy luminosities and rotation rates is studied with total luminosities in the K ′ band. Extinction problems are essentially eliminated at this band centered at 2.1μm. A template luminosity–linewidth relation is derived based on 65 galaxies drawn from two magnitude-limited cluster samples. The zero-point is determined using 4 galaxies with accurately known distances. The calibration is applied to give the distance to the Pisces Cluster (60 Mpc) at a redshift in the… CONTINUE READING