The study of primitive asteroids is relevant to understanding the origin and evolution of our Solar System. These asteroids contain valuable information about volatile and organic compounds present during the prebiotic stages of Earth and other terrestrial planets. Interest in the main-belt asteroids that are the likely sources of primitive near
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Además ofrece acceso al repositorio de preprints del IAC: https://research.iac.es/preprints/l
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The PRIMitive Asteroids Spectroscopic Survey Library: PRIMASS-Lde Leon, Julia et al.102018
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The primordial Helium abundance
The primordial abundance of 4He, YP, is one of the hottest themes in present-day astronomy, mostly due to its cosmological relevance. The disagreement between different determinations has been currently reduced to the 1-2% level, but these differences are still large enough to have deep implications for Big-Bang nucleosynthesis. It is therefore
Luridiana, V.Fecha de publicación:
102003 -
The primordial helium abundance and the number of neutrino families
Based on observations of HII regions and on the new computations of the recombination coefficients of the HeI lines by Porter el al. we obtain a primordial helium abundance by mass of Y_P = 0.2446 ± 0.0029. We consider thirteen sources of error for the Y_P determination; some of them are mainly due to systematic effects, while the rest are mainly
Luridiana, V. et al.Fecha de publicación:
102016 -
The Properties of Quasar Hosts at the Peak of the Quasar Activity
We present near-infrared imaging obtained with ESO VLT/ISAAC of a sample of 16 low luminosity radio-quiet quasars (RQQs) at the epoch around the peak of the quasar activity (2 < z < 3), aimed at investigating their host galaxies. For 11 quasars, we are able to detect the host galaxies and derive their properties, while for the other 5 quasars
Kotilainen, Jari K. et al.Fecha de publicación:
102009 -
The properties of the young stellar populations in powerful radio galaxies at low and intermediate redshifts
We present high-quality, wide spectral coverage long-slit optical spectra for 12 powerful radio sources at low and intermediate redshifts (z < 0.7) that show evidence for a substantial ultraviolet (UV) excess. These data were taken using the William Herschel Telescope and the ESO Very Large Telescope with the aim of determining the detailed
Holt, J. et al.Fecha de publicación:
102007 -
The Pseudobulge of NGC 1292
The photometric and kinematic properties of Sb NGC 1292 suggest it hosts a pseudobulge. The properties of the stellar population of such a pseudobulge are consistent with a slow buildup within a scenario of secular evolution.
Morelli, L. et al.Fecha de publicación:
102008