VLTI-MIDI Observations of MWC 349 A

Details VLTI-MIDI Observations of MWC 349 A VLTI-MIDI Observations of MWC 349 A

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aspc..355..239q&link_type=abstract

Stars with the B[e] Phenomenon. ASP Conference Series, Vol. 355, Proceedings of the Conference Held 10-16 July, 2005, at the Isl

Astronomy and Astrophysics

Astronomy

1

Scientific paper

MWC 349 A is a young massive star near the zero-age main sequence, in the short-lived phase where the parental cloud has been completely dispersed, but the accretion disk has not yet been destroyed by ionization. Illumination by stellar UV radiation drives a strong ionized wind from the surface of the disk. The most spectacular features of the MWC 349 A disk are hydrogen recombination line masers and lasers at mm, sub-mm and mid-IR wavelengths. We have recently conducted observations of MWC 349 A with the MIDI 10 μm instrument of the VLTI, using several baselines with lengths ≥ 47 m. The continuum visibilities show the characteristic signature of a dust disk. In addition, the signatures of at least a dozen emission lines have been identified in the interferometric data.

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