Astronomy and Astrophysics – Astronomy
Scientific paper
May 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977mnras.179..499f&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 179, May 1977, p. 499-508.
Astronomy and Astrophysics
Astronomy
73
Binary Stars, Hot Stars, Infrared Astronomy, M Stars, Stellar Spectrophotometry, Variable Stars, Black Body Radiation, Cosmic Dust, Emission Spectra, Giant Stars, Mira Variables, Stellar Mass Accretion, Tables (Data)
Scientific paper
Results are presented for broadband JHKL infrared photometry of three symbiotic star systems containing an M-type giant (RW Hya, SY Mus, AG Peg), three symbiotic systems exhibiting emission attributed to heated dust (RX Pup, RR Tel, PK 280-2.1 deg), and the VV Cephei system FR Sct. No clear evidence is found for IR variability in the systems without dust emission, and the red component of FR Sct is suggested to be a supergiant. For the systems exhibiting dust emission, IR variations are detected whose amplitude decreases with increasing wavelength. It is proposed that the symbiotic stars without extensive dust emission contain normal nonvariable M giants, while the systems with dust emission contain Mira variables. The possibility is considered that mass transfer in symbiotic systems containing Miras could be accomplished via accretion of a strong stellar wind flowing from the Mira component to the collapsed component.
Catchpole Robin M.
Feast Michael W.
Robertson S. C. B.
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