MIDINFRARED SPECTROSCOPY OF BETA-PICTORIS - CONSTRAINTS ON THE DUST GRAIN-SIZE

Citation
Dk. Aitken et al., MIDINFRARED SPECTROSCOPY OF BETA-PICTORIS - CONSTRAINTS ON THE DUST GRAIN-SIZE, Monthly Notices of the Royal Astronomical Society, 265(4), 1993, pp. 41-43
Citations number
21
Categorie Soggetti
Astronomy & Astrophysics
ISSN journal
00358711
Volume
265
Issue
4
Year of publication
1993
Pages
41 - 43
Database
ISI
SICI code
0035-8711(1993)265:4<41:MSOB-C>2.0.ZU;2-8
Abstract
We present 8-13 mu m spectroscopy of Beta Pictoris which confirms the presence of silicate emission in its infrared excess, as earlier repor ted on the basis of narrow-band photometry, and indicates a similarity with cometary dust. The spectral form of the infrared excess allows u s to place an upper limit of 2-3 mu m on the size of the emitting grai ns in the circumstellar disc.