Observations of X-ray oscillations in XI Boo: Evidence of a fast kink mode in the stellar loops

2009/04/30 by J. C. Pandey, A. K. Srivastava · 1 citation
Physics and Astronomy · #astro-ph.SR

paper · pdf · doi:10.1088/0004-637x/697/2/l153

published as Astrophys.J.697:L153-L157,2009 · ApJL, 5 pages, 3 figures, 2 tables, after proof corrections

Abstract

We report the observations of X-ray oscillations during the flare in a cool active star XI Boo for the first time. XI Boo was observed by EPIC/MOS of the XMM-Newton satellite. The X-ray light curve is investigated with wavelet and periodogram analyses. Both analyses clearly show oscillations of the period of 1019 s. We interpret these oscillations as a fundamental fast-kink mode of magnetoacoustic waves.

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