Outflow of Matter in the Chromosphere of α Orionis

  • L. Goldberg
Part of the Astrophysics and Space Science Library book series (ASSL, volume 89)


The spectrum of α Orionis is composite and consist of three components: 1) a photospheric spectrum characterized by symmetric absorption lines more or less typical of the spectrum of an M2 supergiant, except for their very great widths; 2) a shell spectrum consisting of P Cygni-type profiles of neutral and singly-ionized metallic lines of very low excitation potential; and 3) asymmetric absorption lines, including Hα, Hβ, FeI lines of intermediate excitation potential and the infrared triplet of Ca+, which appear to be formed in a relatively warm layer, probably an extended chromosphere.



Copyright information

© D. Reidel Publishing Company, Dordrecht, Holland 1981

Authors and Affiliations

  • L. Goldberg
    • 1
  1. 1.Kitt Peak National ObservatoryUSA

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