Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...215..533c&link_type=abstract
Astrophysical Journal, Part 1, vol. 215, July 15, 1977, p. 533-535, 537-540.
Astronomy and Astrophysics
Astronomy
58
Microwave Spectra, Nebulae, Stellar Evolution, Stellar Spectra, Stellar Winds, Condensation, Cosmic Dust, Millimeter Waves, O Stars, Polarization Characteristics, Radio Sources (Astronomy), Stellar Spectrophotometry
Scientific paper
The rocket-infrared source CRL 2789 coincides with a nebulous object containing a starlike condensation known as V645 Cyg. The nebula shows strong optical polarization. It is interpreted as a bipolar nebula whose central star is invisible directly but whose existence is indicated by scattering from the nebulae. Radio continuum emission is detected at millimeter wavelengths, which is consistent with a free-free spectrum. The system contains an O7 star with a substantial stellar wind, is 6 kpc distant from earth, and consists of a nebulosity with a mean density of 4000 per cu cm containing much denser condensations in which dust grains may be forming. In evolutionary terms, CRL 2789 is a young object.
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