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Nebular diagnostics of hot star atmospheres

Published online by Cambridge University Press:  26 May 2016

Grazyna Stasińska ,
Daniel Schaerer  and
Claude J. Zeippen
Grazyna Stasińska
Affiliation:
Laboratoire de l'Univers et de ses Theories, Observatoire de Paris-Meudon, F-92195 Meudon, la France
Daniel Schaerer
Affiliation:
Laboratoire d'Astrophysique, Observatoire de Midi-Pyrénées, 14 avenue E. Belin, F-31400 Toulouse, la France
Claude J. Zeippen
Affiliation:
Laboratoire de l'Univers et de ses Theories, Observatoire de Paris-Meudon, F-92195 Meudon, la France

Abstract

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The ionization structure of nebulae depends on the spectral energy distribution of the ionizing stars. Therefore nebulae are potential tools to check the validity of the energy distribution predicted by stellar atmosphere models. However, the problem is complicated by the fact that the ionization structure also depends on the nebular density distribution and that the predictions of photo-ionization models strongly rely on atomic physics computations, which bear their own uncertainties.

Type
Part 3. Location and Distribution of Massive Stars
Information
Symposium - International Astronomical Union , Volume 212: A Massive Star Odyssey: From Main Sequence to Supernova , 2003 , pp. 481 - 486
Copyright
Copyright © Astronomical Society of the Pacific 2003 

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