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On the sensitivity of He I singlet lines to the Fe IV model atom in O stars

2006; EDP Sciences; Volume: 456; Issue: 2 Linguagem: Inglês

10.1051/0004-6361

1432-0746

F. Najarro, D. J. Hillier, J. Puls, T. Lanz, F. Martins,

Astronomical Observations and Instrumentation

Aims.Recent calculations and analyses of O star spectra have revealed discrepancies between theory and observations, and between different theoretical calculations, for the strength of optical singlet transitions. We investigate the source of these discrepancies.