Pantin E. 1,2, Waelkens C. 2, & Malfait K. 2
1 DSM/DAPNIA/SAp, CEA-Saclay, 91191 Gif sur Yvette Cedex FRANCE
2 KUL Leuven, Belgium
We will show for the first time the full infrared spectrum of the Beta-pictoris dust disk obtained with the Short Wavelength Spectrometer (SWS) on board of the ISO satellite. This spectrum covers the IR range from 2.5 to 45 microns. It reveals the presence of various types of crystalline silicates (clino-enstatite, forsterite), as well as a peak at 43 microns characteristic of crystalline water ice. The shortest range of the spectrum (2.5-5 microns) dominated by the photosphere emission also allows to put tightened constraints on the temperature and radius of the star.