We compute the spectral distortions of the cosmic microwave background (CMB) arising during the epoch of cosmological hydrogen recombination within the standard cosmological (concordance) model for frequencies in the range 1-3500 GHz. We follow the evolution of the populations of the hydrogen levels including states up to principle quantum number n

Polarimetry constitutes one of the fundamental tools for characterizing the surface texture and composition of airless Solar System bodies. In 2006, polarimetric observations led to the discovery of a new type of asteroids, which displays a peculiar polarimetric response. These asteroids are collectively known as "Barbarians", from (234) Barbara

LIRIS is an Instituto de Astrofísica de Canarias (IAC) project that consists in a near-infrared (0.9-2.4microns) intermediate resolution spectrograph, conceived as a common user instrument for the WHT. LIRIS will have imaging, long-slit and multi-object spectroscopy observing modes (~1000-3000 Å). Coronography, and polarimetry capabilities will

Context: Most globular clusters are believed to host a single stellar population. They can thus be considered a good place to study the Spite plateau and to search for possible evolutionary modifications of the Li content. Aims: We want to determine the Li content of subgiant (SG) and main sequence (MS) stars of the old, metal-poor globular cluster

Not Available

We report the evolution of the cloud of aerosols produced in the atmosphere of Jupiter by the impact of an object in 19 July 2009 (Sánchez-Lavega et al., Astrophys. J. Lett, Vol. 715, L155. 2010). This study is based on images obtained with a battery of ground-based telescopes and the Hubble Space Telescope in the visible and in the deep near