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Soft x-ray spectral observations of quasars and high x-ray luminosity seyfert galaxies
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Krolik, J. H. Holt, S. S. Petre, R. Mushotzky, R. F. |
| Copyright Year | 1983 |
| Description | Results of the analysis of 28 Einstein SSS observations of 15 high X-ray luminosity (L(x) 10 to the 435 power erg/s) quasars and Seyfert type 1 nuclei are presented. The 0.75-4.5 keV spectra are in general well fit by a simple model consisting of a power law plus absorption by cold gas. The averager spectral index alpha is 0.66 + or - .36, consistent with alpha for the spectrum of these objects above 2 keV. In all but one case, no evidence was found for intrinsic absorption, with an upper limit of 2 x 10 to the 21st power/sq cm. Neither was evidence found for partial covering of the active nucleus by dense, cold matter (N(H) 10 to the 22nd power/sq cm; the average upper limit on the partial covering fraction is 0.5. There is no obvious correlation between spectral index and 0175-4.5 keV X-ray luminosity (which ranges from 3 x 10 to the 43rd to 47th powers erg/s or with other source properties. The lack of intrinsic X-ray absorption allows us to place constraints on the density and temperature of the broad-line emission region, and narrow line emission region, and the intergalactic medium. |
| File Size | 3320595 |
| Page Count | 53 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19840006014 |
| Archival Resource Key | ark:/13960/t6353gp5d |
| Language | English |
| Publisher Date | 1983-11-01 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Quasars Seyfert Galaxies Heao 2 Emission Spectra Luminosity Intergalactic Media X Ray Spectra Line Spectra X Ray Astronomy Galactic Nuclei X Ray Sources Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
