Abstract
Symbiotic stars are characterized by their composite spectra, which show, at the same time, features typical of hot and cool objects, and ionized gas. A typical symbiotic spectrum shows an UV excess, a nebular emission-line spectrum and an IR continuum with absorption bands. Such objects, first identified by Merrill and Humason in the early thirties, are now widely accepted to be double systems composed by a cool giant, frequently a Mira-type star, a hot source like a white dwarf or a hot subdwarf, but whose nature is still controversial, and ionized gas (Friedjung and Viotti 1993).
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References
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© 1997 Springer Science+Business Media Dordrecht
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Costa, R.D.D., Mékarnia, D., Lefèvre, J. (1997). Modelling the Dust Envelope in Symbiotic Systems: The Case of CH Cygni. In: Cherchneff, I., Millar, T.J. (eds) Dust and Molecules in Evolved Stars. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-1307-8_24
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DOI: https://doi.org/10.1007/978-94-017-1307-8_24
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