New calculations of the Galactic contribution to microwave background radiation anisotropies are carried out and a probable Galactic predominance over cosmological signals at large scales is explored for these frequencies When we take into account a frequency-dependent contrast of molecular cloud with respect to the Galactic background of the

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Atomic emission spectroscopy is a passive spectroscopy technique widely used in the diagnosis of plasmas which does not alter the internal kinectic of the discharge during the measurement process, under high pressure conditions. Line profiles are adequately fitted by a Voigt function. One of the parameter which characterizes these spectral lines is

We report here the first results of a program aimed at obtaining high signal to noise (up to ~ 500) optical spectroscopy of a large sample of BL Lac objects using ESO VLT+FORS1. New spectroscopic observations have been obtained for 31 objects, which allows us to obtain new redshift for 13 targets and provide better classification for others. In a

We report on ESO-VLT near-IR adaptive optics imaging of one radio-loud and two radio quiet quasars at z > 2. In the first case we are able to resolve the QSO and find that it is hosted by an elliptical of MK = -27.6. This result, though restricted to a single object, extends up to z=2.5 the finding that cosmic evolution of radio-loud hosts follows