Breaking age/metallicity degeneracy ([19], [1]) is crucial for understanding stellar populations in elliptical galaxies. Spectroscopic properties, such as line...

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We review recent advances in our understanding of massive stars through the analysis of their spectra. Improvements in model atmospheres and analysis methods...

The atmospheric parameters were derived using a strictly spectroscopic method based on the LTE analysis of equivalent widths of FeI and FeII lines. With...

This work is based on the Hobby-Eberly Telescope spectra obtained with the High Resolution Spectrograph, which we use for determination of abundances and...

We present results obtained from a spectroscopic analysis of high-resolution spectra taken with the ESPADONS spectrograph at the Canada-France-Hawaii Telescope...

We present first results of an spectroscopic analysis of 7 O supergiants in Cyg OB2 using two different model atmosphere codes (Santolaya-Rey, Puls, Herrero...

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