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Date and Time of the Query: 2019-08-24 T01:25:07 PDT
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For refcode 2000ApJ...533..781R:
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2000ApJ...533..781R The Correlation between Galaxy H I Line Widths and K' Luminosities Barry Rothberg, Will Saunders, R. Brent Tully, and Peter L. Witchalls Received 1999 August 17; accepted 1999 November 15 ABSTRACT 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 2.1 microns. A template luminosity-line width relation is derived based on 65 galaxies drawn from two magnitude-limited cluster samples. The zero point is determined using four galaxies with accurately known distances. The calibration is applied to give the distance to the Pisces Cluster (59 Mpc) at a redshift in the cosmic microwave background frame of 4771 km s^-1^. The resultant value of the Hubble constant is 81 km s^-1^ Mpc^-1^. The largest sources of uncertainty are the small number of zero-point calibrators at this time at K' and the present application to only one cluster. Subject heading: distance scale-galaxies: distances and redshifts -galaxies: fundamental parameters
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