Abstract

FRANCO-BALDERAS, A.; HERNANDEZ-TOLEDO, H. M.; DULTZIN-HACYAN, D.  and  ROSADO, M.. BV RI surface photometry of mixed morphology pairs of galaxies. III. The third data set. Rev. mex. astron. astrofis [online]. 2005, vol.41, n.2, pp.483-505. ISSN 0185-1101.

This is the third of a series of papers devoted to the study of the photometric properties of spiral and elliptical galaxies in interacting pairs. We report broad band (BV RI) total magnitudes, as well as surface brightness, color and geometric (ε = 1 - b/α, PA and α₄/α) profiles for a sample of 10 mixed morphology (E/S0+S) pairs drawn from the Karachentsev Catalogue of Isolate Pairs of Galaxies (KPG). Most of the objects reported here have their photometric parameters derived for the first time. Surface photometry in combination with image processing and color diagrams are useful to test and reevaluate the morphological classification of each galaxy in these pairs. We find 5 true (E+S) pairs in the present sample, 4 lenticular-spiral (S0+S) systems and 1 spiral-spiral (S+S) pair. We found no clear evidence of a Holmberg effect in our sample of mixed pairs. The existence of a large number of isolated (E+S) pairs (~ 50% in our sample) rises interesting questions for models of galaxy formation.

Keywords : Galaxies [Elliptical]; Galaxies [Fundamental parameters]; Galaxies [Interactions]; Galaxies [Phometry]; Galaxies [Spiral]; Galaxies [Structure].