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No evidence of a sudden change of spectral appearance or magnetic field strength of the O9.7V star HD 54879

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arxiv 1910.14495 v2 pith:W32NK2FT submitted 2019-10-31 astro-ph.SR

G.A. Wade , S. Bagnulo , Z. Keszthelyi , C.P. Folsom , E. Alecian , N. Castro , A. David-Uraz , L. Fossati
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V. Petit M.E. Shultz J. Sikora
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classification astro-ph.SR
keywords magneticstarspectralsuddendatafieldreportedvelocity
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It was recently claimed that the magnetic O-type star HD 54879 exhibits important radial velocity variability indicative of its presence in a spectroscopic binary. More remarkably, it was furthermore reported that the star underwent a short, sudden variation in spectral type and magnetic field. In this Letter we examine new Narval and ESPaDOnS data of this star in addition to the previously-published FORS2 data and conclude that both the reported velocity variations and the sudden spectral and magnetic changes are spurious.

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