Mostrando ítems 1-10 de 35
Arasa Agudo, Raúl (Fecha de defensa: 2011-07-20)
Durant les últimes dècades la quantitat de gasos i partícules contaminants que s’han injectat a l’atmosfera ha augmentat considerablement. Evidència d’aquesta informació són les elevades concentracions ...
Masqué Saumell, Josep Maria (Fecha de defensa: 2012-03-23)
The region GGD 27, located in Sagittarius at a distance of 1.7 kpc, is an active star forming region. The most well-known observational signature of this region, the HH 80/81/80N jet, is one of the ...
Busquet Rico, Gemma (Fecha de defensa: 2010-12-20)
[spa] Diversos estudios observacionales, principalmente de regiones de formación estelar de baja masa, muestran que el cociente NH3/N2H+ es bajo en núcleos asociados con objetos estelares jóvenes mientras ...
Font Ribera, Andreu (Fecha de defensa: 2011-09-30)
[cat] Gran part dels estudis presentats en aquesta tesi doctoral estan vinculats als esforços per detectar les oscil·lacions acústiques dels barions (BAO, de l’anglès Baryon Acoustic Oscillations) en ...
Mateu i Santaeulària, Mireia (Fecha de defensa: 2016-02-05)
In this work, a subsynoptic characterization of tropopause fold structures is derived from one-year of global, high resolution GFS (Global Forecasting System, 0.3 degrees) data analyses and 10 years of ...
Morales Peralta, Juan Carlos (Fecha de defensa: 2010-06-14)
The comparison between stellar structure models and observations of low-mass stars revealed that the stellar radii predicted by models for these stars are about 10% lower than observed, while effective ...
Ossó Castillón, Albert (Fecha de defensa: 2014-07-10)
In 1985 Joseph Farman and his colleagues of the British Antarctic Survey published a paper [Farman et al. 1985] showing that the total ozone content of the atmosphere during the Antarctic spring had ...
Frau Méndez, Pau (Fecha de defensa: 2012-06-12)
It is some observational evidence that dense cores are the birthplace of low-mass stars. These regions, apparently quiescent, are capable of surviving several free-fall times and, potentially, collapse ...
Baena Gallé, Roberto (Fecha de defensa: 2013-12-09)
Adaptive optics (AO) systems are used to increase the spatial resolution achieved by ground-based telescopes, which are limited by the atmospheric motion of air layers above them. Therefore, the real ...
Monguió i Montells, Maria (Fecha de defensa: 2013-11-22)
The main purpose of this thesis is to map the radial variation of the stellar density for the young stellar population in the Galactic anticenter direction in order to understand the structure and ...