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Grain growth, optical polarisation, and extinction in interstellar clouds
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Jones, A. P. |
| Copyright Year | 1989 |
| Description | Increases in the wavelength of maximum polarization and the ratio of total to selective extinction are generally assumed to be the result of grain growth in interstellar clouds. Using a grain model in which the interstellar extinction is explained by amorphous carbon (a-C) and hydrogenated amorphous carbon (a-C:H) mantles on silicate cores the effects of these absorbing carbonaceous mantles on the polarizing properties of large (500 to 2500 A radius) silicate grains were theoretically studied. The polarization model of Mathis was adopted and it was shown that carbon-coated silicate grains can explain the relationship between the wavelength of maximum polarization and R observed toward dark clouds. |
| File Size | 38435 |
| Page Count | 1 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19910005646 |
| Archival Resource Key | ark:/13960/t8md3tr71 |
| Language | English |
| Publisher Date | 1989-12-01 |
| Access Restriction | Open |
| Subject Keyword | Astrophysics Grain Size Optical Polarization Cosmic Dust Interstellar Chemistry Interstellar Extinction Molecular Clouds Mathematical Models Amorphous Materials Silicates Carbon Hydrogenation 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 |
