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On the formation of Balmer emission lines in the model envelopes of Be stars

Published online by Cambridge University Press:  26 May 2016

T. Kogure ,
S. Suzuki  and
M. Mon
T. Kogure
Affiliation:
Bisei Astronomical Observatry, Miyama, Bisei, Okayama
S. Suzuki
Affiliation:
Kanazawa Institute of Technology, Kanazawa, Ishikawa
M. Mon
Affiliation:
Department of Astronomy, Kyoto University, Kyoto

Abstract

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We consider the formation of the Balmer emission lines and the decrement Hα/Hβ/Hγ, by solving the non-LTE problems in elementary regions of the envelope divided by equal line-of-sight velocities. These envelope-elements are characterized by different optical depths in the Balmer lines and by different dilution factors for the incident stellar radiation. It is shown that the decrements sensitively depend on these parameters of the envelope-elements. We show that the observed spectral-type dependence and large scatter of the decrements among Be stars can be explained in terms of the variation of these physical parameters.

Type
6. Be Stars: Circumstellar Environment
Information
Symposium - International Astronomical Union , Volume 162: Pulsation, Rotation and Mass Loss in Early-Type Stars , 1994 , pp. 378 - 379
Copyright
Copyright © Kluwer 1994 

References

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