... Identification and Analysis of Binary Star Systems using Probability Theory E. Grocheva and A. Kiselev Photographic Astrometry Department, Pulkovo Observatory, S.Petersburg, 196140, Russia, Email: gl@spb.iomail.lek.ru Abstract. Accurate identification of physical binary star systems has become of increasing interest in recent years. ... We chose 76 double stars from Pulkovo's observation program and calculated the probabilities of a random distribution for these pairs. ...

... By undertaking a spectral and photometric investi­ gation of the central part of the bright elliptical galaxy NGC 759, we have found an optical counterpart for the circumnuclear molecular gas ring with the radius of # 3 ## (# 1 kpc) which was earlier reported by Wiklind et al. ... 2 Fig. ... More likely, this ring may be a consequence of a tidal encounter between the elliptical galaxy NGC 759 and a large spiral galaxy which was accompanied by a substantial gas accretion. ...