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For refcode 1993MNRAS.263..211R:
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Copyright by Royal Astronomical Society. 1993MNRAS.263..211R Tully-Fisher distances to M 31-like galaxies in the Coma cluster Herbert J. Rood and B. A. Williams PO Box 1330, Princeton, NJ 08542, USA Department of Astrophysical Sciences, Princeton University, Peyton Hall, Princeton, NJ 08544, USA Accepted 1993 January 15. Received 1993 January 11; in original form 1992 January 9 ABSTRACT Newly observed H I 21-cm linewidths for eight galaxies and morphological types for 33 galaxies are combined with data in the literature to construct a homogeneous magnitude-limited sample of spiral galaxies in the Coma cluster. From this sample, we identify the seven Coma M31-like galaxies, i.e. the spiral members with inclinations i >= 44^deg^ and deprojected linewidths {DELTA}V_c_ >= 440 km s^-1^. The distance moduli of these seven galaxies obtained by application of a blue-band Tully-Fisher (TF) relation are used to measure the distance to the Coma cluster. Our result, which is free of `Malmquist' bias at the 36 level, is a distance modulus of {mu}^0^ = 34.4+/-0.2, which corresponds to a Hubble constant H_0_ ~ 90 km s^-1^ Mpc^-1^. The observed rms dispersion of blue-band TF distance moduli for the seven Coma M31-like galaxies is 0.14 mag, which is consistent with observational uncertainties alone, i.e. no intrinsic dispersion of the blue-band TF relation has been detected above the observational rms noise level of 0.14 mag. This small scatter is a specific result of our strict selection criteria adopted at the onset of the analysis. Key words: galaxies: clusters: individual: Coma - galaxies: distances and redshifts - galaxies: spiral - distance scale - radio lines: galaxies.
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