ISO SWS Spectrum and Ground-based images of the Red Rectangle
(Image x2)
The figure shows two images of the Red Rectangle in red light. The left image was taken by H. van Winckel
(Leuven) using the 90 cm Dutch telescope at the European Southern Observatory (E.S.O.), La Silla, Chile, and
shows the remarkable X-shape of the nebula. The right hand image was taken by G. Weigelt and R. Osterbart
(Bonn) using the 2.2m Max Planck telescope, also at E.S.O., using special techniques to obtain high spatial
resolution. The image shows the detailed structure of the innermost part of the nebula. A prominent dark lane is
visible across the image, which is due to the disk surrounding the binary system. The ISO-SWS spectrum is shown
above the two images. The tick marks indicate the position of the oxygen-rich olivine bands, suggesting that the
disk contains oxygen-rich material. This disk may be the site of on-going planet formation.
These observations are dicussed in the ISO/ESA Information Note;
"European astronomers discover planet formation around dying star".
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