| タイトル | An elliptical binary orbit model of GX 1 + 4 |
| 著者（英） | Cutler, E. P.; Dolan, J. F.; Dennis, B. R. |
| 著者所属（英） | NASA Goddard Space Flight Center|Comtech |
| 発行日 | 1986-01-15 |
| 言語 | eng |
| 内容記述 | The X-ray source GX 1 + 4 (4U 1728-24) was observed by the high-energy X-ray spectrometer on OSO 8 for five days from September 20-24, 1978, and X-rays in the energy range 16-72 keV were analyzed. Measurements of the pulse period, pulsar angular acceleration, and luminosity of GX 1 + 4 are reported. The pulsar light curves obtained in different energy ranges are presented, and it is concluded that the period is about 220 s rather than about 110 s. The observations are combined with those reported by others, and a history of GX 1 + 4 as observed in hard X-rays is presentd. A continuous function for the change in period is inferred that suggests a 304-day periodicity. It is proposed that such a period in the spin-up could be caused by an elliptical orbit of GX 1 + 4 abouts its red giant companion. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 86A25258 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/386207 |
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