Other
Scientific paper
Jul 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011yera.confe...6b&link_type=abstract
The 41st Young European Radio Astronomers Conference, held at University of Manchester/Jodrell Bank Observatory, 18-20 July 2011
Other
Scientific paper
Disks around massive stars seem to play a key role both in their formation process and in the supergiant B[e] evolutionary stage. Unveiling the characteristics of the system formed by the ionized stellar outflow and the disk is essential to understand both evolutionary stages. To this, we have studied the MWC349A star, id of massive star with a ionized outflow expanding at nearly constant velocity and whose evolutionary stage is under debate (pre-main sequence or supergiant B[e]). To date, it is along with Cepheus A HW2 the only known object with masers in recombination lines. A 3D radiative transfer model applied to the H30alpha line has allowed to constrain the stellar wind kinematics. The obtained result has been supported by the consistency of the predicted results of our model with the observations of the other observed recombination lines. It seems to indicate that the stellar wind is originated by the disk photo-evaporation, what means an essential step forward in the understanding of the mechanisms originating winds around massive stars.
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