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We determine the extinction curve in the zl = 0.83 lens galaxy of the gravitational lens SBS 0909+532 from the wavelength dependence of the flux ratio between the lensed quasar images (zs = 1.38) from 3400 to 9200Å. It is the first measurement of an extinction curve at a cosmological distance of comparable quality to those obtained within the

We report the first detection of polarization signals induced by the Zeeman Effect in lines of the E4Π-A4Π system of FeH located at 1.6 μm. Motivated by the tentative detection of this band in the intensity spectrum of late-type dwarfs, we have investigated in detail the full Stokes sunspot spectrum in the near-infrared around 1.6 μm, finding

Detection of objects with masses close to that of Jupiter in various astrophysical contexts will be feasible with GTC first light instruments. The mid-infrared camera, CANARICAM, will contribute to the detection and characterization of these objects orbiting around F-M stars and brown dwarfs. It will allow us to explore a domain of orbital radii

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We present Cu and Zn abundances for a sample of 30 stars spanning a metallicity range between solar and [Fe/H]=-3. LTE abundances were obtained using Kurucz model atmospheres and the near UV lines of Cu I 3273.95 and Zn I 3302.58 A observed at high spectral resolution. The trend of [Zn/Fe] vs [Fe/H] is essentially constant over the whole