| タイトル | The photospheric magnetic field of the dM3.5e flare star AD Leonis |
| 著者（英） | Linsky, J. L.; Saar, S. H. |
| 著者所属（英） | Joint Inst. for Lab. Astrophysics |
| 発行日 | 1985-12-01 |
| 言語 | eng |
| 内容記述 | A high-resolution infrared spectrum of the dM3.5e flare star AD Leo, obtained with the Kitt Peak 4 m Fourier Transform Spectrometer, clearly shows the presence of strong magnetic fields. Five absorption lines in the 4400-4600 per cm region have been modeled, and it is inferred that 73 percent + or - 6 percent of the surface of AD Leo is covered by active regions outside of dark spots containing a mean field strength of 3800 + or - 260 G. If these active regions are brighter than the quiet photosphere, the surface filling factor will be somewhat smaller. Since simultaneous H-alpha observations exhibited no evidence of flares, the observations probably represent the quiescent magnetic flux level. The inferred field strength is consistent with equipartition of magnetic and thermal pressures in the photosphere and is similar to values derived using the scaling laws of Golub. The large observed filling factor is consistent with efficient dynamo generation of magnetic flux in this rapidly rotating star. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 86A20332 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/386838 |
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