| タイトル | Galactic arm structure and gamma-ray astronomy |
| 著者（英） | Fichtel, C. E.; Bignami, G. F. |
| 発行日 | 1974-04-15 |
| 言語 | eng |
| 内容記述 | In an attempt to explain the observed unexpectedly high-energy gamma-radiation over a broad region of the galactic plane in the general direction of the galactic center, a model is proposed wherein the galactic cosmic rays are preferentially located in the high-matter-density regions of galactic arm segments, as a result of the weight of the matter in these arms tying the magnetic fields and hence the cosmic rays to these regions. The presently observed longitudinal distribution of galactic gamma-rays can be explained with the current estimate of the average galactic matter density, if the average ratio of arm to interarm matter is 5:1 for the major arm segments toward the galactic center from the sun, and if the cosmic-ray density normalized to its local value is assumed to be directly proportional to the matter density. |
| NASA分類 | SPACE SCIENCES |
| レポートNO | 74A29943 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/452868 |
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