Helioseismology has allowed us to study the structure of the Sun in unprecedented detail.
One of the triumphs of the theory of stellar evolution was that helioseismic studies had …

In this review/tutorial we explore planetary nebulae as a stage in the evolution of low-to-
intermediate-mass stars, as major contributors to the mass and chemical enrichment of the …

The chemical evolution of the Universe is governed by the chemical yields from stars, which
in turn are determined primarily by the initial stellar mass. Even stars as low as 0.9 M⊙ can …

We study the gas phase metallicity (O/H) and nitrogen abundance gradients traced by star-
forming regions in a representative sample of 550 nearby galaxies in the stellar mass range …

Using combined asteroseismic and spectroscopic observations of 418 red-giant stars close
to the Galactic disc plane (6 kpc< R Gal≲ 13 kpc,| Z Gal|< 0.3 kpc), we measure the age …

We present stellar yields calculated from detailed models of low and intermediate-mass
asymptotic giant branch (AGB) stars. We evolve models with a range of mass from 1 to 6 …

The distribution of metals in the Galaxy provides important information about galaxy
formation and evolution. H ii regions are the most luminous objects in the Milky Way at mid …

We present the first results of a pilot study aimed at understanding the influence of bars on
the evolution of galaxy discs through the study of their stellar content. We examine here the …

Context. Open clusters offer a unique possibility to study the time evolution of the radial
metallicity gradients of several elements in our Galaxy, because they span large intervals in …

Context. The present number of Galactic open clusters that have high resolution abundance
determinations, not only of [Fe/H], but also of other key elements, is largely insufficient to …