Other
Scientific paper
Nov 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000esasp.456..211l&link_type=abstract
ISO beyond the peaks: The 2nd ISO workshop on analytical spectroscopy. Eds. A. Salama, M.F.Kessler, K. Leech & B. Schulz. ESA-SP
Other
3
Infrared: Stars, Stars: Early-Type, Fundamental Parameters
Scientific paper
We present 2.4 to 4.1 μm spectra of OB-type stars that were taken both during the nominal and post-helium programme of ISO SWS. Some important diagnostic lines for basic stellar and stellar wind properties are located within this band. Some important diagnostic lines for basic stellar parameters and of the wind properties are located within this band. The spectral type coverage of our sample does not allow us to confidently generalize characteristics, however, we are able to derive important line trends. We also notice an absence of a general trend in the behaviour of the leading Brackett lines of the B supergiants. This seems to indicate that the wind properties of those stars vary significantly while optical characteristics related to spectral type are similar. This study is part of the near-infrared spectroscopy of early-type stars for classification work. This field has recently been developed by Blum et al.(1997), Hanson et al.(1998), Meyer et al.(1998) and others. An infrared spectral calibration is fundamental, for instance for the investigation of massive star formation. This study is part of the work in the context of the SWS stellar classification programme. The spectra presented here will be published in an atlas of about 300 stellar spectra covering the entire MK-classification. For more details see Vandenbussche et al., this proceedings.
de Koter Alex
Kaper Lex
Lenorzer Annique
Morris Pat
Vandenbussche Bart
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