Thomas Preibisch, Yuri Y. Balega,
Dieter Schertl, Gerd Weigelt
Bispectrum speckle interferometry of the massive protostellar
outflow source AFGL 2591
Astronomy and Astrophysics, 412, 735-743 (2003)
We present bispectrum speckle interferometry
of the massive protostellar object AFGL 2591 in the near-infrared K band.
Our reconstructed image of the outflow cavity of AFGL 2591
has a resolution of 170 mas, corresponding to physical scales
of ~170 AU at the distance of the object,
and shows the loops which extend from the bright, compact
source in unprecedented detail.
The central source is clearly resolved and has an
uniform-disk diameter of ~40 mas (40 AU).
We use 2D radiation transfer simulations
to show that the resolved structure probably corresponds to
the inner rim of a geometrically thick circumstellar disk or
envelope at the dust sublimation radius.
Our image also reveals a structure that might
represent an edge-on circumstellar disk around one of the other young stellar
objects near AFGL 2591.
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