A&A Supplement Series, Vol. 125, October II 1997, 255-261

Received May 3; accepted December 20, 1996

Calibration of the Tully-Fisher relation in the field

S. Rauzy

Send offprint request: S. Rauzy (rauzy@cpt.univ-mrs.fr)
ANPE and Centre de Physique Théorique, CNRS, Luminy Case 907, F-13288 Marseille Cedex 9, France

Abstract:

A new technique for calibrating slope and relative zero-point of Tully-Fisher like relations by using a sample of distant field galaxies is proposed. Based on a null-correlation approach (NCA), the technique is insensitive to the presence of selection effects on apparent magnitude m and on log line-width distance indicator p. This interesting property is used for discarding nearby galaxies of the observed sample. It is shown that such a subsampling allows in effect to attenuate biases on calibration parameters created by the presence of radial peculiar velocities.

keywords: galaxies: distances and redshifts -- distance scale

• 1. Introduction
• 2. Distance and velocity estimates
• 3. Calibration using null-correlation approach
• 4. Conclusion
• A. The distance estimator
• B. Correlation between and
• C. Correlation between and
• D. Application to the Mathewson field galaxies sample
• References