| タイトル | The high-overtone p-mode spectrum of the rapidly oscillating Ap star HR 1217 (HD 24712) - Results of a frequency analysis of 324 hr of multi-site photometric observations obtained during a 46-d time-span in 1986 |
| 著者（英） | Matthews, J. M.; Kurtz, D. W.; Seeman, J.; Cropper, Mark; Martinez, P. |
| 著者所属（英） | Cape Town Univ.|Anglo-Australian Observatory|University of Western Ontario |
| 発行日 | 1989-10-15 |
| 言語 | eng |
| 内容記述 | The present high-speed photometry for the rapidly oscillating Ap star HR 1217 indicates that the 6-min light variations are amplitude-modulated, in phase with the magnetic variations. Amplitude and magnetic maxima coincide, while the mean light minimum occurs at a perhaps significantly different time. It is established that HR 1217 is an oblique rotator with a centered dipole magnetic field, as well as an oblique pulsator whose pulsation and magnetic axes are aligned. There are six principal frequencies of pulsation; the secondary frequencies indicate that the principal ones are amplitude-modulated on a time-scale of months. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 90A14041 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/359836 |
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