%0 Journal Article
%T Color Correlations in (S+S) Binary Galaxies I. The Holmberg Effect
%A Hector Hernandez Toledo
%A Ivanio Puerari
%J Physics
%D 2000
%I arXiv
%X Relying on his photometry of galaxies, Holmberg (1958) found, more than 40 years ago, that the color indices of paired galaxies were closely correlated. Our deep broad-band BVRI CCD photometry of 45 (S+S) pairs from the Karachentsev (1972) catalogue (see Hernandez Toledo and Puerari, this volume), and additional (B-V) color information from the literature (50 extra (S+S) pairs), help us to confirm the effect. This "Holmberg Effect" has long been remained unverified and not explained yet.
%U http://arxiv.org/abs/astro-ph/0010530v1