Abstract
We present some insight on the ionization structure of the circumstellar disks around Be type stars based on the study of Balmer decrements for absorption-corrected emission lines. Owing to this analysis, three different ionization zones in the envelope are proposed: the inner one, completely ionized, of about ∼ 5R*, an intermediate recombination zone extending up to ∼ [10 - 20]R*, and an outer extended zone of neutral H.
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Torrejón, J., Bernabeu, G. & Fabregat, J. On the Ionization Structure of Circumstellar Disks Around Be Type Stars. Astrophysics and Space Science 263, 243–246 (1998). https://doi.org/10.1023/A:1002126731267
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DOI: https://doi.org/10.1023/A:1002126731267