Publications
of the
MPIfR
Optical & Infrared
Interferometry Group
Hofmann, K.H., Balega, Y., Ikhsanov, N.R.,
Miroshnichenko, A.S., Weigelt, G.
Bispectrum speckle interferometry of the B[e]
star MWC 349A
Astronomy and Astrophysics, 395, 891 (2002)
Abstract:
We present the results of bispectrum speckle
interferometry of the B[e] star MWC 349A obtained with the SAO
6m 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 lead 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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