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Fluorescence processes and line identifications in the uv spectra of cool stars
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Johansson, Sveneric Carpenter, Kenneth G. |
| Copyright Year | 1988 |
| Description | Fluorescence processes active in the outer atmospheres of noncoronal cool stars and the UV lines they produce are summarized. Eight pumping processes and 21 fluorescent line products are discussed. The processes, which produce 12 lines, involves energy levels not previously known to be radiatively populated. Four of these are examples of self-fluorescence, whereby one or more lines of Fe II photo-excite through coincident lines the upper levels of other Fe II lines lines seen in emission, while two others explain the selective excitation of solitary Ni II and Si I lines. Nine of the line products are decays from levels in Fe I and Fe II already known to be radiatively populated. |
| File Size | 332998 |
| Page Count | 8 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19890001382 |
| Archival Resource Key | ark:/13960/t5m953z5z |
| Language | English |
| Publisher Date | 1988-06-01 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Stellar Atmospheres Chromosphere Cool Stars Emission Spectra Spaceborne Astronomy Ultraviolet Spectra Fluorescence Iue Iron Ultraviolet Astronomy Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
