Propiedades de las Nebulosas Planetarias mediante el satélite Gaia

Abstract

The high precision of the astrometric and photometric parameters provided by the ESA (European Space Agency) Gaia satellite, has allowed us to study and analyse in depth the physical, chemical and evolutionary properties of stars in the Planetary Nebula (PN) phase. First, from the coordinates of the known PNe, we have developed an algorithm that identifies the most likely Gaia star source to be the Central Star (CS) of each of the PNe. Then, from the parallaxes of these sources, we have been able to estimate their distances, and to select a sample (composed by PNe with the most precise distances) on which to work. The knowledge of the distances has allowed us to calculate the intrinsic properties of the PNe and their CSs from their observational properties. To then be able to study their evolutionary state, and to analyse the binarity of various CSPNe. We have also made a similar study over stars in the post-AGB phase, the stellar phase previous to PN. Finally, we have carried out an analysis about the chemical composition of some of these nebulae, based on the spectra detected at the La Palma Observatory, and obtaining results of both their ionic and elemental abundances.