The distribution of bar strengths in disk galaxies is of fundamental importance in studies of galaxy evolution for two reasons. First, bars are the most important morphological features of galaxies that cross the spiral-S0 divide. They are a potentially fruitful way of comparing these two classes of disk galaxies and perhaps for better

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This proposal is a resubmission of an accepted RXTE AO 11 proposal. Our aim is to test evolutionary and type I burst models with the observed type I X-ray burst behaviour of the bright ultra-compact binary system 4U 1820-30. The short orbital period suggests that the companion white dwarf is hydrogen deficient, with evolutionary models predicting a

In a recent survey for baryonic matter at large scales in the Corona Borealis Supercluster, using the Sunyaev-Zeldovich (SZ) effect, it has been found SZ evidence (Génova-Santos et al. 2005, Battistelli et al. 2006) for a potentially large amount of warm/hot plasma towards the center of this supercluster, in a region where there are no known

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The presence of compact and massive star clusters is a characteristic property of many starburst and interacting galaxies. Their extreme mechanical and radiation energy outputs are now believed to be the largest negative feedback agents leading to a large-scale structuring of the ISM and limiting star formation in the host galaxies. The aim of our