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| Paper: |
Symbiotic stars |
| Volume: |
9, Cool Stars, Stellar Systems, and the Sun: Sixth Cambridge Workshop |
| Page: |
206 |
| Authors: |
Kenyon, Scott J. |
| Abstract: |
Long-period interacting binaries which include a red giant star and a hot companion are discussed in terms of their physical properties. Called symbiotic stars, the binaries display red continuums and the absorption features of late-type giant stars as well as blue continuums with bright H I and He I emission lines. Evidence for the identification of symbiotic stars as binary systems is reviewed including radial velocity variations, spectral energy distributions, and orbital solutions. The hot-component and nebulalike characteristics of the symbiotic stars are reviewed with particular reference to recent studies which confirm the symbiotic binary model. Three types of symbiotic binaries are confirmed by the observations: (1) semidetached symbiotic binaries; (2) short period detached symbiotics; and (3) long period detached symbiotics. The symbiotic phenomena are not fully understood, however, due to the lack of spectra below about 1000 A and the incomplete understanding of the mass motions. |
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