| タイトル | The X-ray emitting galaxy Centaurus A |
| 著者（英） | Becker, R. H.; Boldt, E. A.; Holt, S. S.; Serlemitsos, P. J.; Mushotzky, R. F. |
| 著者所属（英） | Maryland Univ.|NASA Goddard Space Flight Center |
| 発行日 | 1978-03-15 |
| 言語 | eng |
| 内容記述 | OSO-8 X-ray observations of Cen A in 1975 and 1976 are reported. The source spectrum can be well fitted in both years by a power law of number index 1.66 and absorption due to 1.3 by 10 to the 23rd power atoms/sq cm. The total flux varied by a factor of 2 between 1975 and 1976. In 1976 there were flux variations of approximately 40% on a time scale of days. Measurements of the 6.4-keV Fe fluorescent line and the 7.1-keV absorption edge imply Fe/H of approximately 0.000016. Simultaneous radio measurements show variation in phase with X-ray variability. Consideration of radio, millimeter, infrared, and X-ray data shows that all the data can be accounted for by a model in which the X-rays are due to a synchrotron self-Compton source embedded in a cold H2 cloud. |
| NASA分類 | ASTRONOMY |
| レポートNO | 78A27957 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/433432 |
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