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| Title: |
Circumstellar material in Algols and Serpentids
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| Author(s): |
Plavec, M. J.; Dobias, J. J.; Etzel, P. B.; Weiland, J. L.
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| Abstract: |
The observations of the emission lines of C 4, N 5, Si 4, etc. in interacting binaries of the Algol and W Serpentid types are reviewed. So far, seven Serpentid are known, and seven bona fide Algol-type semidetached systems were found to display the same kind of emission lines, only on a weaker scale. Interesting differences are observed in both the absolute and relative strengths of the emission lines. In some systems, the C 4 resonance doublet is the strongest, while in others, the N 5 doublet is definitely stronger. The main cause of this dichotomy is suspected to be the varying degree of CNO processing of the observed material. But the variable ratio of the strength of the C 2 line to that of the C 4 line suggests temperature differences between the emitting regions of the individual systems, too.
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| NASA Center: |
NASA (non Center Specific)
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| Publication Date: |
Dec 1, 1984
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| Document Source: |
CASI |
| Online Source: |
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| Document ID: |
19850012741
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| Accession ID: |
85N21051
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| Publication Information: |
NASA. Goddard Space Flight Center Future of Ultraviolet Astronomy Based on Six Years of IUE Res., p 420-423, Number of Pages = 4 |
| Price Code: |
A01 |
| Keywords: |
BINARY STARS; EMISSION SPECTRA; IUE; LINE SPECTRA; STELLAR ENVELOPES; INTERSTELLAR EXTINCTION; STELLAR TEMPERATURE; TEMPERATURE GRADIENTS; X RAY SOURCES;
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| Notes: |
In NASA. Goddard Space Flight Center Future of Ultraviolet Astronomy Based on Six Years of IUE Res. p 420-423 (SEE N85-20961 11-89) |
| Accessibility: |
Unclassified; No Copyright; Unlimited; Publicly available; |
| Updated/Added to NTRS: |
2008-12-26 |
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