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Slowly-rotating nitrogen-rich O stars in 30 Doradus

Published online by Cambridge University Press:  29 August 2024

F. Tramper Open the ORCID record for F. Tramper [Opens in a new window]
F. Tramper*
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
*
email: frank.tramper@kuleuven.be
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Abstract

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The VLT/FLAMES Tarantula Survey (Evans et al. 2011) identified a group of slowly-rotating nitrogen-rich O-type stars that cannot be explained by current evolutionary models. Here we present high-quality VLT/UVES observations of four of these stars that allow a detailed quantitative spectroscopic analysis. We present the analysis of the spectra with a genetic algorithm, and discuss the future steps to be taken to further investigate the cause of the nitrogen enrichment.

Keywords

stars: abundancesstars: atmospheresstars: chemically peculiarstars: early-typestars: evolutionstars: fundamental parameters
Type
Poster Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S361: Massive Stars Near and Far , May 2022 , pp. 256 - 258
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

References

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Tramper, F., Sana, H., de Koter, A., et al. 2014, A&A, 572, A36 Google Scholar
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