期刊
ASTRONOMY & ASTROPHYSICS
卷 395, 期 3, 页码 891-898出版社
E D P SCIENCES
DOI: 10.1051/0004-6361:20021351
关键词
techniques : image processing; stars : emission-line, Be; stars : individual : MWC 349A
We present the results of bispectrum speckle interferometry of the B[ e] star MWC 349A obtained with the SAO 6 m telescope. Our diffraction-limited J-, H-, and K- band images ( resolutions 43-74 mas) suggest the star is surrounded by a circumstellar disk seen almost edge-on. The observed visibility shape is consistent with a two-component elliptical disk model, probably corresponding to the gaseous and dusty components of the disk. We show that the classification of the object as a pre-main-sequence star or a young planetary nebula is problematic. An analysis of the uncertainties in the basic parameter determination leads us to the conclusion that MWC 349A is probably either a B[ e] supergiant or a binary system, in which the B[e]-companion dominates the observed properties.
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