| タイトル | Discovery of phase-locked variable polarization in an RS Canum Venaticorum-like star, HR 5110 |
| 著者（英） | Kemp, J. C.; Barbour, M. S. |
| 著者所属（英） | Oregon Univ. |
| 発行日 | 1981-05-15 |
| 言語 | eng |
| 内容記述 | Using measurements on 79 nights in 1980 January-August, it is established that the polarization in the ultraviolet (U band) varies synchronously on the known binary period of 2.6132 days, with a peak-to-peak amplitude of 0.03%. The pattern is mainly second harmonic in character, as typical of binary star examples such as Algol and Upsilon Her. Reflection by the cooler star, by a plasma concentration, or both, is suggested. The scale of the polarization seems to be consistent with Rayleigh scattering by neutral hydrogen on the cooler star, and a roughly lambda to the -4th wavelength dependence should be searched for. The QU curve suggests a sizeable inclination for the system, of about 45 deg, but this is preliminary. Separately, a possible weak periodicity might be present on a subsidiary period, conceivably related to a rotating star spot. |
| NASA分類 | ASTRONOMY |
| レポートNO | 81A35244 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/416591 |
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