Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...220...92s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 220, no. 1-2, Aug. 1989, p. 92-98.
Astronomy and Astrophysics
Astrophysics
28
Carbon Stars, Late Stars, Radio Emission, Stellar Envelopes, Stellar Mass Ejection, Centimeter Waves, Continuous Radiation, Millimeter Waves, Thermal Emission
Scientific paper
The detection of continuum emission at 1.5 and 2 cm from the late-type carbon star IRC+10216 is reported. Given current estimates of the long-wavelength dust emissivity index, it is demonstrated that the combination of emission from circumstellar dust (with a constant emissivity index) and a stellar black-body cannot account for the observed radio fluxes. A survey of 1.5-cm emission from a list of late-type stars (and protoplanetary nebulae) with extensive mass-loss envelopes is presented, and radio emission has been tentatively discovered from CRL 2688 for the first time. The results support the finding of Kwok and Feldman (1981) that the expansion of the ionized region in CRL 618 has slowed down since 1980.
Claussen Mark J.
Masson Colin R.
Sahai Raghvendra
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