Loading...
Please wait, while we are loading the content...
Similar Documents
Iue observations of fe 2 galaxies
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Fosbury, R. A. E. Snijders, M. A. J. Haskell, J. D. J. Boksenberg, A. Penston, M. V. |
| Copyright Year | 1981 |
| Description | Repeated observations of the Seyfert 1 galaxies I Zw 1 and II Zw 136, which have very strong Fe II emission lines in the optical region, were made at low resolution with the IUE Satellite. The ultraviolet spectra are very similar: both are variable and show broad emission features of Fe II (especially the UV multiplets 1, 33, 60, 62, and 63) as well as the emission lines usually strong in Seyferts and quasars. The data strongly support the hypothesis that the optical Fe II emission lines are primarily due to collisional excitation and that resonance fluorescence makes only a minor contribution to the excitation of these lines. |
| File Size | 507979 |
| Page Count | 10 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19810017442 |
| Archival Resource Key | ark:/13960/t9n34p53p |
| Language | English |
| Publisher Date | 1981-01-01 |
| Access Restriction | Open |
| Subject Keyword | Astrophysics Quasars Seyfert Galaxies Emission Spectra Ultraviolet Spectra Spectral Energy Distribution Iue 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 |
