Using the VLA and the VLBA we have observed water maser emission in the proto-planetary nebula candidate IRAS 19134+2131, in which the water maser spectrum has double radial-velocity peaks separated by ˜100 km s-1. The main purpose of this study is to reveal the 3-D kinematics of the masers in detail, which indicates a fast ( ˜110 km s-1) bipolar

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We have investigated the nature of the energy source of 36 LINERs with Chandra X-ray observations selected from the catalogue by Carrillo et al. (1999). In most galaxies a nuclear compact source has been detected in the hard band (2-8 KeV). However they show a rather irregular morphology embedded in diffuse X-ray emission for lower energies (0.3-2

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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