| Abstract
| - Karachentsev's sample of 585 compact binary galaxies is inspected in order to see a signature of extended massive dark haloes around the component galaxies. Our approach utilizes the good velocity-separation resolution provided by this sample containing many close pairs, in order to see directly the expected trends in the $M/L$ vs. Xproj plane. A developed version of Turner's normalization, attempting to take into acount different sizes of binary orbits (increasing with luminosity), makes it possible to see "directly" a meaningful lower limit of $M/L$ from the emerging short-projection envelope in the $M/L$ vs. Xnorm diagram. This part of the diagram is little influenced by the incompleteness at large values of separation Xproj, which usually leads to too small values of mass-to-luminosity ratios. We conclude that these binaries give relatively direct evidence for the existence of massive dark haloes, with $M/L$ (conservatively) larger than about 25 (for $H_0 = 75$ km s -1/Mpc), consistent with the simulation studies on Karachentsev's triplets by Chernin & Mikkola ([CITE]) and on the binaries by Wiren et al. ([CITE]), and other more recent studies of the triplets (Karachentsev [CITE]).
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