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Ionization Structure in Equatorial Winds of B[e] Supergiants

Published online by Cambridge University Press:  26 May 2016

Michaela Kraus  and
Henny J.G.L.M. Lamers
Michaela Kraus
Affiliation:
Sterrenkundig Instituut, Universiteit Utrecht, Princetonplein 5, NL-3584 CC Utrecht, The Netherlands
Henny J.G.L.M. Lamers
Affiliation:
Sterrenkundig Instituut, Universiteit Utrecht, Princetonplein 5, NL-3584 CC Utrecht, The Netherlands

Abstract

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The non-spherically symmetric winds of B[e] supergiants are investigated. An empirical density distribution is chosen that accounts for the density concentrations and ratios derived from observations, and our model winds are assumed to contain only H and He. We calculate the Strömgren radii and the more accurate ionization fractions for H and He and find that in equatorial direction the winds of B[e] supergiants can become neutral very near the stellar surface. A neutral disk therefore exists around these stars in which molecules and dust can form which are shielded from the photodissociating stellar radiation field.

Type
Session 1 Observations of Rotating Stars
Information
Symposium - International Astronomical Union , Volume 215: Stellar Rotation , 2004 , pp. 107 - 108
Copyright
Copyright © Astronomical Society of the Pacific 2004 

References

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