Hostname: page-component-78c5997874-v9fdk Total loading time: 0 Render date: 2024-11-17T14:02:37.440Z Has data issue: false hasContentIssue false
  • English
  • Français

The Effect of Silicon and Carbon opacity on ultraviolet stellar spectra

Published online by Cambridge University Press:  14 August 2015

Owen Gingerich  and
David Latham
Owen Gingerich
Affiliation:
Smithsonian Astrophysical Observatory and Harvard College Observatory, Cambridge, Mass., U.S.A.
David Latham
Affiliation:
Smithsonian Astrophysical Observatory and Harvard College Observatory, Cambridge, Mass., U.S.A.

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Silicon and especially carbon bound-free absorptions considerably reduce the emergent flux in the ultraviolet for stars near spectral type A0 (Teff = 10000 K). An overabundance of silicon and/or an underabundance of carbon can affect the Balmer discontinuity and the Paschen continuum by a few per cent at most. However, the abundances of these ultraviolet absorbers will have little effect on the temperature distribution calculated for a star if the model is chosen to match the visual spectrum. An examination of the ultraviolet spectrum of Sirius shows that still more opacity is needed; part of this absorption can be supplied by line blanketing.

Type
Part I: Stellar Fluxes
Information
Symposium - International Astronomical Union , Volume 36: Ultraviolet Stellar Spectra and Related Ground-Based Observations , 1970 , pp. 64 - 70
Copyright
Copyright © Reidel 1970 

References

Gingerich, O. and Rich, J. C.: 1966, Astron. J. 71, 161.Google Scholar
Stecher, T. P.: 1969, Astron. J. 74, 98.Google Scholar
Strom, S. E. and Strom, K. M.: 1969, Astrophys. J. 155, 17.CrossRefGoogle Scholar
Tousey, R.: 1963, Space Sci. Rev. 2, 3.CrossRefGoogle Scholar