Volume 395, Number 3, December I 2002
|Page(s)||891 - 898|
|Section||Interstellar and circumstellar matter|
|Published online||18 November 2002|
Bispectrum speckle interferometry of the B[e] star MWC 349A
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, firstname.lastname@example.org
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
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.