Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apl%26c..36..323h&link_type=abstract
Astrophysical Letters and Communications, vol. 36, p. 323-327.
Astronomy and Astrophysics
Astrophysics
1
Galaxies, Distance Scale, Tully-Fisher Relation, Calibration
Scientific paper
In this paper we derive a Tully-Fisher relation from measured I band photometry and Hα rotation curves of a large survey of southern sky spiral galaxies obtained in Persic&Salucci (1995) by deprojecting and folding the raw Hα data of Mathewson, Ford and Buchhorn (1992). We calibrate the relation by combining several of the largest clusters in the survey, using an iterative maximum likelihood procedure to account for observational selection effects and Malmquist bias. We also incorporate a simple model for the line of sight depth of each cluster. Our results indicate a Tully-Fisher relation of intrinsic dispersion close to 0.3 mag, corresponding to a distance error dispersion of 13 percent. Application of this relation to mapping the large scale velocity field is underway.
Hendry Martin A.
Persic Massimo
Rauzy Stephane
Salucci Paolo
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