Dark matter in the inner parts of barred galaxies : The data

This paper presents surface photometry ( B, V, I, J, H, K) and Ha rotation curves of 27 isolated spiral galaxies. The final goal is to obtain the mass distribution of a sample of isolated spiral galaxies in order to model their gas kinematics. This is then compared to the observed rotation curve, to determine the necessity of a dark halo in the inner parts (Perez et al. 2004, AA Marquez & Moles 1999, AA Baggett et al. 1998, AJ, 116, 1626). Regarding the Kormendy relation ( Kormendy 1977, ApJ, 218, 333), in agreement with de Jong, no correlation between the bulge effective radius and its surface brightness is found, possibly due to the small range of bulge magnitudes covered. We find a smaller scatter in the structural relations when compared to non-isolated samples in agreement with Marquez & Moles ( 1999). Finally, a correlation between the disk scale-length and the bar size is observed, possibly reflecting the rapid growth of a bar.