| タイトル | Rotational modulation in IUE spectra of cool dwarf chromospheres: Data analysis and period search techniques |
| 著者（英） | Endal, A. S.; Altner, B.; Hallam, K. L. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 1986-09-01 |
| 言語 | eng |
| 内容記述 | The IUE spectra of bright F-K dwarfs were used to investigate rotational modulation in chromospheric and transition region emission lines, with Stellingwerf's phase dispersion minimization (PDM) technique as the basis of time series analysis. Sampling-related aliases are found to dominate the PDM spectra in these sparsely sampled, irregularly spaced time series. The star chosen to illustrate the techniques is epsilon Eridani, a young, chromospherically active K2 dwarf. Strong indications of a rotation period close to 2.8 days in epsilon Eridani from 2 seasons of observations, with evidence for the persistence in longitude of the active area(s) over several hundred rotation cycles are found. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 87N19187 |
| 権利 | Copyright, Distribution within the U.S. granted by agreement |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/233806 |
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