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 …

We present near-infrared observations of 42 gravitationally lensed galaxies obtained in the
framework of the KMOS Lensed Emission Lines and VElocity Review (KLEVER) Survey, a …

We present high-resolution large-scale observations of the molecular and atomic gas in the
Local Group galaxy M 33. The observations were carried out using the HEterodyne Receiver …

The oxygen abundance gradients among nebular emission line regions in spiral galaxies
have been used as important constraints for models of chemical evolution. We present the …

We present a low-dispersion period–luminosity relation (PL) based on 154 Cepheids in
Messier 33 (M33) with Hubble Space Telescope (HST) photometry from the PHATTER …

Context. The stellar metallicity and its gradient place constraints on the formation and
evolution of galaxies. Aims. This is a study of the metallicity gradient of the LMC, SMC and …

Se presenta un resumen del estado actual de la investigación sobre las nebulosas
planetarias y sus estrellas centrales, y temas relacionados como los procesos atómicos en …

We present new homogeneous measurements of Na, Al, and three α-elements (Mg, Si, Ca)
for 75 Galactic Cepheids. The abundances are based on high spectral resolution (R~ 38 …

We present deep spectrophotometry of several H ii regions in the nearby low-mass spiral
galaxies NGC 300 and M33. The data have been taken with Ultraviolet–Visual Echelle …

We use planetary nebulae (PNe) as probes to determine the Galactic radial oxygen
gradients and other abundance patterns. We select data homogeneously from recent data …