Loading...
Please wait, while we are loading the content...
Similar Documents
Infrared properties of dust grains derived from iras observations
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Wesselius, P. R. Laureijs, R. J. Clark, I. O. Chlewicki, G. |
| Copyright Year | 1987 |
| Description | The analysis of several diffuse interstellar clouds observed by the Infrared Astronomy Satellite (IRAS) is presented. The 60/100 micron flux ratios appear to be nearly constant in clouds with up to 1 sup m visual extinction at the center. Observations of a highly regular cloud in Chamaeleon show that the 12/100 micron ratio peaks at an intermediate radial distance and declines towards the center of the cloud. These observations indicate that nonequilibrium emission accounts only for the 12 and 25 micron bands; strong emission observed at the 60 micron band is probably due to equilibrium thermal radiation. The correlation of the 12 micron emission with a red excess observed for a high latitude cloud, L1780, is shown to be consistent with the assumption that both features are due to fluorescence by the same molecular species. |
| File Size | 269684 |
| Page Count | 4 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19870014850 |
| Archival Resource Key | ark:/13960/t6838ps8f |
| Language | English |
| Publisher Date | 1987-05-01 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Grain Size Galactic Structure Dust Thermal Emission Molecular Clouds Diffuse Radiation Infrared Astronomy Infrared Astronomy Satellite Zodiacal Light Brightness Distribution Data Reduction Interstellar Matter Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
