Issue |
A&A
Volume 395, Number 3, December I 2002
|
|
---|---|---|
Page(s) | 891 - 898 | |
Section | Interstellar and circumstellar matter | |
DOI | https://doi.org/10.1051/0004-6361:20021351 | |
Published online | 18 November 2002 |
Bispectrum speckle interferometry of the B[e] star MWC 349A
1
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
2
Special Astrophysical Observatory, Nizhnij Arkhyz, Zelenchuk district, 369167, Karachai-Chirkassian Republic, Russia
3
Central Astronomical Observatory RAS at Pulkovo, Pulkovo 65/1, 196140 St. Petersburg, Russia
4
Department of Physics and Astronomy, University of Toledo, Toledo, OH 43606, USA
Corresponding author: K.-H. Hofmann, khh@mpifr-bonn.mpg.de
Received:
24
June
2002
Accepted:
10
September
2002
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.
Key words: techniques: image processing / stars: emission-line, Be / stars: individual: MWC 349A
© ESO, 2002
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