Context: Unevolved metal-poor stars constitute a fossil record of the early Galaxy, and can provide invaluable information on the properties of the first...
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PublicaciónFirst stars XI. Chemical composition of the extremely metal-poor dwarfs in the binary CS 22876-032
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PublicaciónFundamental physics with ESPRESSO: a new determination of the D/H ratio towards PKS1937-101
Primordial abundances of light elements are sensitive to the physics of the early Universe and can directly constrain cosmological quantities, such as the...
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PublicaciónGalactic evolution of oxygen. OH lines in 3D hydrodynamical model atmospheres
Context. Oxygen is the third most common element in the Universe. The measurement of oxygen lines in metal-poor unevolved stars, in particular near-UV OH lines...
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PublicaciónGalactic planetary nebulae with precise nebular abundances as a tool to understand the evolution of asymptotic giant branch stars
We present nucleosynthesis predictions (HeCNOCl) from asymptotic giant branch (AGB) models, with diffusive overshooting from all the convective borders, in the...
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PublicaciónGamma-ray line emission from OB associations and young open clusters. II. The Cygnus region
Gamma-ray and microwave observations of the Cygnus region reveal an intense signal of 1.809 Me line emission, attributed to radioactive decay of 26, that is...
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PublicaciónHeavy Element Nucleosynthesis in the Brightest Galactic Asymptotic Giant Branch Stars
We present updated calculations of stellar evolutionary sequences and detailed nucleosynthesis predictions for the brightest asymptotic giant branch (AGB) stars...
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PublicaciónHeavy-element yields and abundances of asymptotic giant branch models with a Small Magellanic Cloud metallicity
We present new theoretical stellar yields and surface abundances for asymptotic giant branch (AGB) models with a metallicity appropriate for stars in the Small...
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PublicaciónHot bottom burning and s-process nucleosynthesis in massive AGB stars at the beginning of the thermally-pulsing phase
We report the first spectroscopic identification of massive Galactic asymptotic giant branch (AGB) stars at the beginning of the thermal pulse (TP) phase. These...
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PublicaciónIdentification of Near-infrared [Se iii] and [Kr vi] Emission Lines in Planetary Nebulae
We identify [Se iii] 1.0994 μm in the planetary nebula (PN) NGC 5315 and [Kr vi] 1.2330 μm in three PNe from spectra obtained with the Folded-Port InfraRed...