Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978mnras.184..893w&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 184, Sept. 1978, p. 893-902.
Astronomy and Astrophysics
Astronomy
34
Emission Spectra, Light Emission, Radio Sources (Astronomy), Stellar Spectra, Symbiosis, Nebulae, Radio Spectra, Stellar Envelopes
Scientific paper
A search for 2-cm continuum emission from 91 symbiotic stars has been undertaken using the Parkes radio telescope. Nine sources have been detected, four of which are reported for the first time. The radio spectral indices are mostly about 0.6; these are interpreted in terms of mass loss. In two stars a portion of the radio spectrum has an index of zero, and for one of these stars (RX Puppis) this is plausibly a manifestation of the cessation of symbiotic activity that occurred about two decades ago. There is an extraordinarily good correlation between the detectability at 2 cm and the presence of circumstellar dust, but not between the radio and optical domains. The importance of continued radio monitoring of HM Sagittae over the next few years is stressed.
Allen David A.
Wright Alan E.
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