Title: The spectrum of the young star HD 100546 observed with the Infrared Space Observatory
Authors: Malfait, Koen ×
Waelkens, Christoffel
Waters, Laurentius
Vandenbussche, Bart
Huygen, Eric
de Graauw, MS #
Issue Date: Apr-1998
Publisher: Springer verlag
Series Title: Astronomy and astrophysics vol:332 issue:2 pages:L25-L28
Abstract: It is generally assumed that planets form in the dusty disks that surround young stars (Beckwith & Sargent 1996). The Infrared Space Observatory (Kessler et al. 1996) now enables us to determine the characteristics of these disks with unprecedented spectral resolution and signal-to-noise, We present here ISO spectra of the disk that surrounds the young star HD 100546. A remarkable variety of emission features of carbon-and oxygen-rich dust occurs. Most prominent are a series of emission features that can be attributed to silicates in crystalline form, mostly forsterite. In the interstellar medium and Hn regions the silicate dust is mostly amorphous, but crystalline silicates are found in comets, meteorites and interplanetary dust particles. The forsterite features of HD 100546 are astonishingly similar to those observed in the ISO spectrum of Comet Hale-Bopp (Crovisier et al. 1997), strengthening the hypothesis that the disk around HD 100546 contains a huge swarm of comets (Grady et al. 1997). We argue that the crystallisation process occurs during the early evolution of the circumstellar disks of young stars and speculate about the formation of an Oort cloud around HD 100546.
ISSN: 1432-0746
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Institute of Astronomy
× corresponding author
# (joint) last author

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