Rotation, spectral variability, magnetic geometry and magnetosphere of the Of?p star CPD −28° 2561★
Rotation, spectral variability, magnetic geometry and magnetosphere of the Of?p star CPD −28° 2561★
We report magnetic and spectroscopic observations and modeling of the Of?p star CPD -28 2561. Using more than 75 new spectra, we have measured the equivalent width variations and examined the dynamic spectra of photospheric and wind-sensitive spectral lines. A period search results in an unambiguous 73.41 d variability period. …