High-amplitude, long-term X-ray variability in the solar-type star HD 81809: The beginning of an X-ray activity cycle

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[1] Favata, F.
[2] Micela, G.
[3] Baliunas, S.L.
[4] Schmitt, J.H.M.M.
[5] 5,Güdel, M.
[6] Harnden Jr., F.R.
[7] Sciortino, S.
[8] Stern, R.A.
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Favata, F. (Fabio.Favata@rssd.esa.int) | 1600年 / EDP Sciences卷 / 418期
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