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Optical studies of galactic nebulae and of their exciting stars : The role of dust on the radius of the ionized hydrogen sphere

  • Part III: IR-Sources, Masers and Compact H II Regions
  • Conference paper
  • First Online:
H II Regions and Related Topics

Part of the book series: Lecture Notes in Physics ((LNP,volume 42))

Abstract

From new observational data, Georgelin, Lortet-Zuckermann and Monnet (1975) and Chopinet and Lortet-Zuckermann (1975) have rediscussed the use of the Zanstra method in order to derive the rate of stellar ultra-violet photons from hot stars and have studied the relation between the excitation of the nebular spectrum and the spectral type of the exciting star. I wish to show here that dust grains mixed within the ionized gas cannot be an efficient competitor with hydrogen atoms for the absorption of stellar Lyman photons, and thus that this mechanism cannot affect significantly the effective temperature scale derived by Georgelin, Lortet-Zuckermann and Monnet.

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References

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Authors and Affiliations

  1. Département d'Astrophysique Fondamentale, Observatoire de Meudon, Meudon, France

    M. C. Lortet

Authors
  1. M. C. Lortet
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T. L. Wilson D. Downes

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© 1975 Springer-Verlag

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Lortet, M.C. (1975). Optical studies of galactic nebulae and of their exciting stars : The role of dust on the radius of the ionized hydrogen sphere. In: Wilson, T.L., Downes, D. (eds) H II Regions and Related Topics. Lecture Notes in Physics, vol 42. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-07409-0_110

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  • DOI: https://doi.org/10.1007/3-540-07409-0_110

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-07409-0

  • Online ISBN: 978-3-540-37927-0

  • eBook Packages: Springer Book Archive

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