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- W2905241167 abstract "The recorded activity of gamma Cas (B0.5 IVe) in the ultraviolet is important to an understanding of the mechanism behind this prototypical Be star's high energy activity, especially its hard X-ray emissions. Our analysis focuses first on the phasing of ultraviolet and optical light curves from different epochs. The rotational interpretation of the 1.22d optical signal is justifiedin part on this phasing. Next we detail observations of migrating subfeatures, which traverse blue to red across line profiles in high quality spectra. These are likely to be proxies for surface magnetic fields, which have not been detected yet by spectropolarimetric means in rapid rotating Be stars like gamma Cas. We also analyze the important responses of the semi-forbidden resonance S IV line at lambda1404.8 to simultaneous X-ray variations. These results offer indirect support for the existence of small-scale magnetic fields on this Be star." @default.
- W2905241167 created "2018-12-22" @default.
- W2905241167 creator A5005057270 @default.
- W2905241167 date "2019-02-28" @default.
- W2905241167 modified "2023-09-25" @default.
- W2905241167 title "Ultraviolet Activity as Indicators of Small-scale Magnetic Fields in <i>γ</i> Cassiopeiae" @default.
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- W2905241167 doi "https://doi.org/10.1088/1538-3873/aaf70b" @default.
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