A&A Supplement Series, Vol. 125, October II 1997, 255-261
Received May 3; accepted December 20, 1996
Send offprint request: S. Rauzy (email@example.com)
ANPE and Centre de Physique Théorique, CNRS, Luminy Case 907, F-13288 Marseille Cedex 9, France
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