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For refcode 1991ApJ...376....8F:
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Copyright by American Astronomical Society. Reproduced by permission
1991ApJ...376....8F THE DISTANCE TO THE COMA CLUSTER USING THE B-BAND TULLY-FISHER RELATION M. FUKUGITA Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606, Japan S. OKAMURA AND K. TARUSAWA Kiso Observatory, Institute of Astronomy, University of Tokyo, Mitake-mura, Kiso-gun, Nagano 397-01, Japan H. J. ROOD Institute for Advanced Study, Princeton, NJ 08540 AND B. A. WILLIAMS Department of Physics, University of Delaware, Newark, DE 19716 Received 1990 August 13; accepted 1991 January 16 ABSTRACT The distance to the Coma cluster was estimated using the B-band Tully- Fisher relation. We took all galaxies for which H I line width data are available in a circle of 4^deg^ radius centered on the Coma cluster, and carried out photographic surface photometry on them. The sample represents a substantial fraction of all spiral galaxies for m_z_< 15.5 mag inside this circle. We estimated carefully possible errors which would enter in each step to form the Tully-Fisher relation. In particular, a detailed estimate was made of the cluster population incompleteness bias for the distance estimation. We found that the correction for the sample incompleteness, when combined with the dispersion of the Tully-Fisher relation, increases the distance modulus by 0.3 mag, but that it cannot be as large as the value recently suspected by Kraan-Kortweg, Cameron and Tammann. As our best estimate for the Coma cluster we obtained the distance modulus of (m - M)^0^= 34.5 +/- 0.4, which corresponds to a Hubble constant H_0_ = 92^+21^_-17_km s^-1^ Mpc^-1^. Subject headings: cosmology - galaxies: clustering - galaxies: distances galaxies: photometry - radio sources: 21 cm radiation
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