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Ultraviolet Si IV/C IV Ratios for Be Stars

Published online by Cambridge University Press:  14 August 2015

Karl G. Henize ,
James D. Wray ,
S. B. Parsons  and
G. F. Benedict
Karl G. Henize
Affiliation:
Dept. of Astronomy, University of Texas, Austin, Tex., U.S.A.
James D. Wray
Affiliation:
Dept. of Astronomy, University of Texas, Austin, Tex., U.S.A.
S. B. Parsons
Affiliation:
Dept. of Astronomy, University of Texas, Austin, Tex., U.S.A.
G. F. Benedict
Affiliation:
Dept. of Astronomy, University of Texas, Austin, Tex., U.S.A.

Abstract

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The intensities of the very strong lines of C IV λ 1549 Å and Si IV λλ 1394, 1403 Å observed in spectra obtained with Skylab experiment S019 provide a sensitive discrimination of spectral type between B0 and B2. Eye estimates of the Si IV/C IV ratio are tabulated for 33 B0-B2, class III-V stars of which 11 are emission-line stars. Seven of the emission-line stars show significantly smaller ratios than normal stars of the same MK class. The most outstanding examples are 60 Cyg, o Pup, η Cen, and Ara.

Type
Part III: New Observational Techniques
Information
Symposium - International Astronomical Union , Volume 70: Be and Shell Stars , 1976 , pp. 191 - 195
Copyright
Copyright © Reidel 1976 

References

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