The authors review the multifrequency behaviour of the so-called non-magnetic cataclysmic variables (NMCVs) after having discussed the classification of the CVs following different known approaches. They remark some open questions and give some new inputs for a faster and more general development of the studies of such binary systems in which the

The authors present the first results of their multicolor polarimetric study of stars in the association Ara OB1. Stars belonging to the clusters NGC 6204, NGC 6193, NGC 6167, and the local field were observed as part of a global study of the region. The polarimetry shows that the orientation of the polarimetric vectors of member stars are very

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We present preliminary results of the kinematics of HII regions and diffuse gas in the irregular galaxies IC10 and NGC 4449. From Fabry-Perot Hα and [SII] observations, we have measured the radial velocities and velocity dispersions of the HII regions in these galaxies and compared them with a similar analysis done in the Small Magellanic Cloud. We