Spectral Variations of Of?p Oblique Magnetic Rotator Candidates in the Magellanic Clouds
arXiv:1507.02434 · doi:10.1088/0004-6256/150/4/99
Abstract
Optical spectroscopic monitoring has been conducted of two O stars in the Small and one in the Large Magellanic Cloud, the spectral characteristics of which place them in the Of?p category, which has been established in the Galaxy to consist of oblique magnetic rotators. All of these Magellanic stars show systematic spectral variations typical of the Of?p class, further strengthening their magnetic candidacy to the point of virtual certainty. The spectral variations are related to photometric variations derived from OGLE data by Naze et al. (2015) in a parallel study, which yields rotational periods for two of them. Now circular spectropolarimetry is required to measure their fields, and ultraviolet spectroscopy to further characterize their low-metallicity, magnetically confined winds, in support of hydrodynamical analyses.
18 pages, 6 figures, accepted for publication by AJ
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Cited by in corpus (9)
- The MiMeS survey of magnetism in massive stars: Magnetic analysis of the O-type stars
- The Magnetic Early B-type Stars III: A main sequence magnetic, rotational, and magnetospheric biography
- A Modern Search for Wolf-Rayet Stars in the Magellanic Clouds. IV. A Final Census
- Magnetically Confined Wind Shocks in X-rays - a Review
- The effects of surface fossil magnetic fields on massive star evolution: IV. Grids of models at Solar, LMC, and SMC metallicities
- A search for strong magnetic fields in massive and very massive stars in the Magellanic Clouds
- First constraints on the magnetic field strength in extra-Galactic stars: FORS2 observations of Of?p stars in the Magellanic Clouds
- The Luminous Blue Variable RMC127 as seen with ALMA and ATCA
- Detection of extragalactic magnetic massive stars