Nitrogen abundances of the Be-type stars in 30 Doradus

Bibcode
2024MNRAS.527.5155D
DOI
10.1093/mnras/stad3537
Dufton, P. L.; Langer, N.; Lennon, D. J.; Schneider, F. R. N.; Evans, C. J.; Sana, H.; Taylor, W. D.
Referencia bibliográfica

Monthly Notices of the Royal Astronomical Society

Fecha de publicación:
1
2024
Revista
Monthly Notices of the Royal Astronomical Society
Número de autores
7
Número de autores del IAC
1
Número de citas
0
Número de citas referidas
0
Descripción
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 parameters and chemical compositions, in particular their nitrogen abundance. Reliable results were found for 23 targets comprising the largest Large Magellanic Cloud sample currently available. The nitrogen abundance estimates have been compared with predictions from evolutionary models for rapidly rotating single stars (or non-interacting multiple systems) and for interacting binaries. The observations appear to be incompatible with all the targets having a single star evolutionary history. The results agree better with a binary evolutionary history with at least 30 per cent of the VFTS sample having apparently evolved by this pathway. These conclusions are consistent with a previous analysis of the ve sin i-estimates for this Be-type sample.
Tipo
Con árbitro
Nubes de Magallanes
Galaxias
Cúmulos de estrellas

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