2019
DOI: 10.48550/arxiv.1901.03975
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A short and sudden increase of the magnetic field strength and the accompanying spectral variability in the O9.7V star HD54879

S. Hubrig,
M. Kueker,
S. P. Jarvinen
et al.

Abstract: Only eleven O-type stars have been confirmed to possess large-scale organized magnetic fields. The presence of a −600 G longitudinal magnetic field in the O9.7 V star HD 54879 with a lower limit of the dipole strength of ∼2 kG, was discovered a few years ago in the framework of the ESO large program "B-fields in OB stars". Our FORS 2 spectropolarimetric observations from 2017 October 4 to 2018 February 21 reveal the presence of short and long-term spectral variability and a gradual magnetic field decrease from… Show more

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