We report here first results concerning stellar oxygen abundances in M33. Non-LTE model atmosphere and non-LTE line formation calculations were used to...
The stellar population of the star-forming region G61.48+0.09
Context: We present the results of a near-infrared photometric and spectroscopic study of the star-forming region G61.48+0.09. Aims: The purpose of this study...
The stellar populations of quiescent ultra-diffuse galaxies from optical to mid-infrared spectral energy distribution fitting
We use spectral energy distribution (SED) fitting to place constraints on the stellar population properties of 29 quiescent ultra-diffuse galaxies (UDGs) across...
The stellar populations of the Milky Way satellites: the early Universe through the color-magnitude diagram
The Milky Way satellites offer the possibility of studying their star formation histories in great detail. Color-magnitude diagrams (CMDs) reaching the old main...
The stellar spectral features of nearby galaxies in the near infrared: tracers of thermally pulsing asymptotic giant branch stars?
We analyse the stellar absorption features in high signal-to-noise ratio (S/N) near-infrared (NIR) spectra of the nuclear region of 12 nearby galaxies, mostly...
The Stellar Velocity Distribution Function in the Milky Way Galaxy
The stellar velocity distribution function in the solar vicinity is reexamined using data from the Sloan Digital Sky Survey Apache Point Observatory Galactic...
The stochastic nature of stellar population modelling
Since the early 1970s, stellar population modelling has been one of the basic tools for understanding the physics of unresolved systems from observation of...
The strange case of Na I in the atmosphere of HD 209458 b. Reconciling low- and high-resolution spectroscopic observations
Aims: We aim to investigate the origin of the discrepant results reported in the literature about the presence of Na I in the atmosphere of HD 209458 b, based...
The striking near-infrared morphology of the inner region in M100
New optical and near-infrared (NIR) K-band images of the inner 3 kpc region of the nearby Virgo spiral M100 (NGC 4321) display remarkable morphological changes...