| タイトル | Infrared observations and thermal models of the Beta Pictoris disk |
| 著者（英） | Gillett, F. C.; Witteborn, F. C.; Backman, D. E. |
| 著者所属（英） | NASA Ames Research Center|Kitt Peak National Observatory |
| 発行日 | 1992-02-01 |
| 言語 | eng |
| 内容記述 | Measurements of the flux from the central portion of the Beta Pic disk performed via photometry at 3.5-20 microns in 4- and 8-arcsec apertures are presented. The 10.1- and 20-micron measurements show an excess which is extended, with significant flux located in the annulus between 4- and 8-arcsec diameter centered on the star. Disk models are calculated to reproduce the ground-based IR data, IRAS fluxes, IRAS 60-micron scan profile widths, and optical scattered light distribution. The color temperature and angular scale of the disk are found to be inconsistent with emission from large ('blackbody') particles: most of the thermal emission originates from particles which are inefficient radiators, with sizes near 1 micron. A simple disk with a single power-law spatial distribution is inconsistent with the combined optical and IR data. The inner disk component represents a gross deficit of material relative to an inward extrapolation of the outer component. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 92A22372 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/329780 |
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