NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-26 T10:56:15 PDT
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For refcode 1996ApJ...463...60B:
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Copyright by American Astronomical Society. Reproduced by permission
1996ApJ...463...60B A NEW I-BAND TULLY-FISHER RELATION FOR THE FORNAX CLUSTER: IMPLICATION FOR THE FORNAX DISTANCE AND LOCAL SUPERCLUSTER VELOCITY FIELD M. BUREAU AND J. R. MOULD Mount Stromlo and Siding Spring Observatories, Institute of Advanced Studies, The Australian National University, Private Bag, Weston Creek P.O., ACT 2611, Australia AND L. STAVELEY-SMITH Australia Telescope National Facility, CSIRO, P.O. Box 76, Epping, NSW 2121, Australia Received 1995 June 5; accepted 1995 December 4 ABSTRACT The Fornax Cluster represents an important step in the extragalactic distance scale. Here we present a new I-band luminosity-H I velocity width (I-band Tully-Fisher) study of the cluster using an enlarged sampled of spiral galaxies in Fornax. I-band CCD photometry and 21 cm parameters are measured for 23 members of Fornax and compared with data for the Virgo Cluster. We obtain an accurate distance modulus of Fornax relative to Virgo of -0.06 +/- 0.15 mag. The low scatter of Fornax galaxies around the Tully-Fisher relation will make the cluster an ideal calibrator once a direct measurement of its distance is obtained. Furthermore, the H I content of the galaxies does not seem affected by the cluster environment. Here we use two different absolute calibration methods which yield an absolute distance to Fornax of 15.4 +/- 2.3 Mpc (absolute distance modulus of 30.94 +/- 0.33 mag). A simple model yields a Local Group Virgocentric flow velocity of 224 +/- 90 km s^-1^ which corresponds to a Hubble constant of H_0_ = 74 +/- 11 km s^-1^ Mpc^-1^ from the Fornax data. Subject headings: distance scale - galaxies: clusters: individual (Fornax) galaxies: distances and redshifts galaxies: photometry
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