| タイトル | 2-165 keV observations of active galaxies and the diffuse background |
| 著者（英） | Baity, W. A.; Mushotzky, R. F.; Gruber, D. E.; Peterson, L. E.; Matteson, J. L.; Rothschild, R. E. |
| 著者所属（英） | NASA Goddard Space Flight Center|California Univ. |
| 発行日 | 1983-06-15 |
| 言語 | eng |
| 内容記述 | HEAO 1 spectral observations of 12 active galaxies in the 12-165 keV and 2-50 keV ranges are reported. The spectra of these galaxies in the 2-165 keV range are well represented by a single power law model; within experimental uncertainties a narrow dispersion in power law index attributable to the individual galaxies is observed, while the 2-165 keV luminosities of these galaxies ranged from 3 x 10 to the 43rd to 3 x 10 to the 45th ergs/s. An apparent universality of the spectral form is found which can be interpreted as due to a common electron distribution with a temperature of tens of keV in the Compton scattering region or as a common nonthermal power-law distribution generating the observed flux through synchrotron-Compton processes. The data indicate that relativistic particles are likely to be responsible for the X-rays from cores of active galaxies through synchroton-Compton processes. In addition, it is noted that only weak number evolution, if any at all, is present in active galaxies. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 83A37307 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/403653 |
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