Hostname: page-component-586b7cd67f-g8jcs Total loading time: 0 Render date: 2024-11-30T07:47:53.166Z Has data issue: false hasContentIssue false
  • English
  • Français

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

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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

Henize, K. G., Wray, J. D., Parsons, S. G., Benedict, G. F., Bruhweiler, F. C., Rybski, P. M., and O'Callaghan, F. G.: 1975, Astrophys. J. Letters 199, L119.Google Scholar
Hiltner, W. A., Garrison, R. F., and Schild, R. E.: 1969, Astrophys. J. 157, 313.CrossRefGoogle Scholar
Lesh, J. R.: 1968, Astrophys. J. Suppl. Ser. 17, 371.Google Scholar
Morgan, W. W. and Keenan, P. C.: 1973, Ann. Rev. Astron. Astrophys. 11, 29.Google Scholar
O'Callaghan, F. G., Henize, K. G., and Wray, J. D.: 1976, Appl. Opt. , in press.Google Scholar
Peytremann, E.: 1975, Astron. Astrophys. 39, 393.Google Scholar