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The structure of chromospheres around late-type giants and supergiants
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Brown, A. Jordan, C. Ferraz, M. |
| Copyright Year | 1981 |
| Description | Observations alpha Tau (K5III) and beta Gru (M2II) made at high resolution are used to confirm line identifications of features blended at low resolution. The high resolution spectra allow selected pairs of lines to be used to find the electron density and the opacity. Methods for determining these factors and the usual emission measure are presented. The electron density and opacity can be used together with the emission measure to place constraints on the structure of the atmosphere. The line formation processes are briefly discussed. Photo-excitation by strong lines appears to be important in these late type atmospheres. |
| File Size | 310656 |
| Page Count | 6 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19810017388 |
| Archival Resource Key | ark:/13960/t9g49hq20 |
| Language | English |
| Publisher Date | 1981-01-01 |
| Access Restriction | Open |
| Subject Keyword | Astrophysics Stellar Spectra Chromosphere Electron Density Concentration Giant Stars Photoionization Emission Spectra Supergiant Stars Late Stars Iue Flux Rate Excitation Opacity Line Spectra Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
