Context: The discovery of multiple main sequences (MS) in the massive clusters NGC 2808 and Omega Centauri, along with multiple subgiant branches in NGC 1851...
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PublicationMultiple stellar populations in Magellanic Cloud clusters. I. An ordinary feature for intermediate age globulars in the LMC?
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PublicationMultiplicity of the red supergiant population in the young massive cluster NGC 330
Context. The multiplicity properties of massive stars are one of the important outstanding issues in stellar evolution. Quantifying the binary statistics of all...
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PublicationNew cluster candidates in dwarf galaxies of the Local Group
V and I images of the nearby dIrr galaxies Sextans A and Sextans B were searched for the clusters. The cadidates were selected, from a sample of non-stellar...
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PublicationNitrogen abundances of the Be-type stars in 30 Doradus
A sub-set of the 67 Be-type stars observed in 30 Doradus during the VLT-FLAMES Tarantula Survey (VFTS) campaign have been analysed to estimate atmospheric...
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PublicationNuclear star formation in the hotspot galaxy NGC 2903
We present high-resolution near-infrared imaging obtained using adaptive optics and HST/NICMOS, and ground-based spectroscopy of the hotspot galaxy NGC 2903...
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PublicationOn ageing star clusters using red supergiants independent of the fraction of interacting binary stars
We use the Binary Population and Spectral Synthesis models to test the recent suggestion that red supergiants can provide an accurate age estimate of a coeval...
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PublicationOn biases in the predictions of stellar population synthesis models
Sampling fluctuations in stellar populations give rise to dispersion in observables when a small number of sources contribute effectively to the observables...
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PublicationOn emission-line spectra obtained from evolutionary synthesis models. I. Dispersion in the ionising flux and Lowest Luminosity Limits
Stellar clusters with the same general physical properties (e.g., total mass, age, and star-formation mode) may have very different stellar mass spectra due to...
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PublicationOn emission-line spectra obtained from evolutionary synthesis models. II. Scale-relations and the estimation of mass dependences
Aims: In this paper we study the influence of the ionizing cluster mass on the emission line spectrum of H ii regions in order to determine the influence of low...