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Interstellar grain chemistry and the composition of comets
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Valero, F. P. J. Sandford, Scott A. Allamandola, Louis J. |
| Copyright Year | 1988 |
| Description | During the past 15 years considerable progress in observational techniques has been achieved in the middle infrared, the spectral region most diagnostic of molecular vibrations. Spectra of many different astronomical infrared sources are now available. By comparing these astronomical spectra with the spectra of lab ices, one can determine the composition and abundance of the icy materials frozen on the cold dust grains present in the interior of molecular clouds. In the experiments described, the assumption is made that cometary ices are similar to interstellar ices. As an illustration of the processes which can take place as an ice is irradiated and subsequently warmed, the infrared spectra is presented of the mixture H2O:CH3OH:CO:NH3:C6H14 (100:50:10:10:10). Apart from the last species, the ratio of these compounds is representative of the simplest ices found in interstellar clouds. |
| File Size | 120917 |
| Page Count | 2 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19890003975 |
| Archival Resource Key | ark:/13960/t1zd2td2x |
| Language | English |
| Publisher Date | 1988-09-01 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Cometary Atmospheres Cosmic Dust Infrared Sources Astronomy Interstellar Chemistry Molecular Clouds Spectrum Analysis Ice Chemical Composition Infrared Spectra Molecular Excitation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
