We report on the distribution of metallicities, [Fe/H], for very metal-poor stars in the halo of the Galaxy. Although the primary information on the nature of the Metallicity Distribution Function (MDF) is obtained from the two major recent surveys for metal-poor stars, the HK survey of Beers and collaborators, and the Hamburg/ESO Survey of

The latest results from the Jodrell Bank -- IAC two-element 33 GHz interferometer will be presented. Measurements are made of the amplitude of Cosmic Microwave Background (CMB) fluctuations on angular scales of 1o (l =208 ± 18) and 2o (l = 106 ± 19). The first results on a deep scan at 2o resolution showed a clear detection at all RAs with Δ T = 43

We present very deep near-infrared imaging in the Js, H and Ks-bands of the HDF-S and the field around the z=0.83 cluster MS1054-03 with ISAAC on the VLT. For the HDF-S this resulted in the deepest ground-based infrared observations to date and the deepest Ks-band in any field. We constructed Ks-selected multicolor catalogs in both fields

Ground based and HST imaging of quasars (see, e.g., Dunlop et al. 2003; Pagani et al. 2003 and references therein) clearly indicate that at z 0.5 quasars are hosted in massive galaxies dominated by the spheroidal component. While radio loud quasars (RLQ) are exclusively hosted by ellipticals exceeding by 2-3 mag L*, radio quiet quasars (RQQ) are

We want to test the observed type I X-ray burst behaviour of the bright ultra-compact binary system 4U 1820-30 with evolutionary and burst models. The short orbital period suggests that the companion white dwarf is hydrogen deficient, with evolutionary models predicting a composition of either pure helium or a small amount of hydrogen (~5-35% by

We present deep IJHK_s and H_2 images of a region in the Chamaeleon I dark cloud containing the very low-mass young object [KG2001]102, in an attempt to search for multiplicity and molecular outflows in the vicinity of this object. No low-velocity shocked structures were detected on our H_2 image. The broad-band and narrow-band images show that