| タイトル | Evidence for a primordial magnetic field during the meteorite parent body era |
| 著者（英） | Sonett, C. P. |
| 著者所属（英） | Arizona Univ. |
| 発行日 | 1978-02-01 |
| 言語 | eng |
| 内容記述 | Data on 247 meteorites were examined, and a log-log plot of the magnetic moment/gm versus the susceptibility/gm reveals a straight-line relation with a slope of unity for a range of meteorite types extending from achondrites at the low Fe-Ni end to stony-irons. The relation holds for a span of parameter values ranging between four and five orders. The results support the hypothesis of a common background magnetic field at the time of meteorite formation. An equation relating the primordial field strength to the average carrier demagnetization factor, which can vary from 0 to 4 pi, is presented. The extreme lower limit for the field strength is 0.02 oersted, while for the mean field of 0.27 oersted determined from a study of individual meteorites (Stacy and Banerjee, 1974), the average value for the carrier demagnetization factor is 0.74, corresponding to elongated grains. |
| NASA分類 | LUNAR AND PLANETARY EXPLORATION |
| レポートNO | 78A26512 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/433532 |
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