Observations of symbiotic stars at millimeter and submillimeter wavelengths

Astronomy and Astrophysics – Astronomy

Scientific paper

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Binary Stars, Radio Astronomy, Radio Stars, Symbiotic Stars, Continuous Radiation, Millimeter Waves, Radio Telescopes, Submillimeter Waves

Scientific paper

Observations of three symbiotic stars, AG Peg, RX Pup, and V1016 Cyg, made at wavelengths near 1 mm using the James Clerk Maxwell Telescope, are presented, with emphasis on the use of these and other radio and IR data as a means to test models for the radio emission from symbiotic stars, particularly in cases where the binary separation is known. In the case of the S-type symbiotic AG Peg, all data are consistent with a uniform power-law spectrum for the stellar component covering nearly four orders of magnitude in wavelength. The D-type systems RX Pup and V1016 Cyg both exhibit ff emission at centimeter, millimeter, and submillimeter wavelengths, whereas emission from dust dominates at wavelengths near 100 microns and shorter. The turnover frequency at about 100 GHz indicates that the inner diameter of the radio shell representing the interaction zone is about 0.06 arcsec, in agreement with high-resolution radio maps.

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