SWS observations of the β Pictoris dust disk

Details SWS observations of the β Pictoris dust disk SWS observations of the β Pictoris dust disk

Mar 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999esasp.427..385p&link_type=abstract

The Universe as Seen by ISO. Eds. P. Cox & M. F. Kessler. ESA-SP 427., p. 385

Physics

9

Stars: Β Pictoris, Vega Phenomenon, Circumstellar Disks, Dust Properties

Scientific paper

We present in this paper a full SWS scan of the β Pictoris infrared spectrum obtained with the Short Wavelength Spectrometer on board the ISO spacecraft. The data, spanning a range from 2.4 to 45 μm can be divided into two subparts. The stellar emission produced by the star photosphere (2.4-4 μm) is shown and compared to stars atmosphere models in order to derive some physical properties of the star such as effective temperature and radius. The dust emission (5-45 μm) arises from heated dust grains in orbit around the star and arranged geometrically in a disk. We carefully examine this part and search for dust features predicted by β Pictoris dust disk models. If some crystalline silicate features are undoubtedly present in the spectrum, they cannot be attributed to crystalline forsterite. The subclass of crystalline silicate emitting these features cannot, according to the current knowledge in this field, be identified. Once again, the β

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