Publications
of the
MPIfR
Optical & Infrared
Interferometry Group
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, (2003)
Abstract.
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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