Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982assl...95...27a&link_type=abstract
In: The nature of symbiotic stars; Proceedings of the Seventieth Colloquium, Saint-Michel-l'Observatoire, Alpes-de-Haute-Provenc
Astronomy and Astrophysics
Astronomy
90
Giant Stars, Infrared Astronomy, Stellar Atmospheres, Variable Stars, Infrared Photometry, Infrared Spectrophotometers, Infrared Spectroscopy, Late Stars, M Stars, Mira Variables, Stellar Envelopes, Stellar Spectra, Tables (Data)
Scientific paper
Infrared photometry and spectroscopy of symbiotic stars is reviewed. It is shown that at wavelengths beyond micron these systems are generally dominated by the cool star's photosphere and, indeed, are indistinguishable from ordinary late-type giants. About 25% of symbiotic stars exhibit additional emission due to circumstellar dust. Most of the dusty systems probably involve Mira variables, the dust forming in the atmospheres of the Miras. In a few cases the dust is much cooler and the cool component hotter; the dust must then form in distant gas shielded from the hot component, perhaps by an accretion disk.
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