Recent models for the large-scale Galactic magnetic fields in the literature have been largely constrained by synchrotron emission and Faraday rotation measures. We use three different but representative models to compare their predicted polarized synchrotron and dust emission with that measured by the Planck satellite. We first update these models

The secondary cosmic microwave background (CMB) B-modes stem from the post-decoupling distortion of the polarization E-modes due to the gravitational lensing effect of large-scale structures. These lensing-induced B-modes constitute both a valuable probe of the dark matter distribution and an important contaminant for the extraction of the primary

The Virgo cluster is the largest Sunyaev-Zeldovich (SZ) source in the sky, both in terms of angular size and total integrated flux. Planck's wide angular scale and frequency coverage, together with its high sensitivity, enable a detailed study of this big object through the SZ effect. Virgo is well resolved by Planck, showing an elongated structure

The OAS Project has been run with the support of the Spanish research funding agencies during the last dozen years . Within its framework, research on cultural astronomy has been developed for a s eries of ancient civilizations , from the Atlantic Islands to the Arabian Peninsula and beyond, with the Meditterranean Sea as the principal axis of

Se presenta un análisis arqueoastronómico de la orientación definida por los muros del santuario de entrada del oppidum ibérico Cerro de las Cabezas (Valdepeñas, Ciudad Real), situado en la Oretania septentrional, así como de otros recintos pertinentes para el análisis. El resultado más relevante es que dos de los muros perimetrales del santuario

New accurate and homogeneous optical UBVRI photometry has been obtained for variable stars in the Galactic globular cluster ω Cen (NGC 5139). We secured 8202 CCD images covering a time interval of 24 years and a sky area of 84 × 48 arcmin. The current data were complemented with data available in the literature and provided new, homogeneous