Extended Data Fig. 6: Rotational variability and superflare event in a Galactic field sdB star. | Nature Astronomy

Extended Data Fig. 6: Rotational variability and superflare event in a Galactic field sdB star.

From: A plague of magnetic spots among the hot stars of globular clusters

Extended Data Fig. 6

Upper panel displays the folded TESS light curve of a Galactic field sdB star showing α2CVn spot-induced variability. Filled squares are the 2.5-σ clipped median values every 300 data points, while the error bars reflect the 1-σ RMS of the clipped flux values. Lower panel proves the occurrence of an energetic (~1035 erg) superflare event in this field sdB star. Both phenomena necessitate the presence of magnetic fields.

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