The binary system MWC 349

Details The binary system MWC 349 The binary system MWC 349

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...292..249c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 292, May 1, 1985, p. 249-256.

Astronomy and Astrophysics

Astronomy

69

Binary Stars, Early Stars, Emission Spectra, Optical Emission Spectroscopy, Radio Astronomy, H Ii Regions, Hot Stars, Infrared Spectroscopy, Interstellar Extinction, Photosphere, Stellar Luminosity

Scientific paper

Using the VLA the authors have resolved the ionized zone surrounding MWC 349. They see definite evidence for an interaction between a wind from MWC 349B and that from MWC 349A, in the form of an arc of enhanced radio emission. This interaction shows that the two stars form a binary system. From the 5 GHz data a wind temperature of 8700±300K and a mass loss rate of (1.2±0.05)×10-5M_sun;yr-1 are derived for MWC 349A. The authors present an optical spectrum of the B component of this binary system that enables a direct spectral classification of MWC 349B as a B0 III star, at a distance of 1.2 kpc. The unusual geometry of the radio emission, the low infrared luminosity, and this extra extinction could all be explained by an edge-on, circumstellar, dusty disk close to the orbital plane of the binary.

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