Cool prominences in the corona of the rapidly rotating dMe star, HK Aquarii.

Details Cool prominences in the corona of the rapidly rotating dMe star, HK Aquarii. Cool prominences in the corona of the rapidly rotating dMe star, HK Aquarii.

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...311..651b&link_type=abstract

Astronomy and Astrophysics, v.311, p.651-660

Astronomy and Astrophysics

Astrophysics

32

Stars: Late-Type, Stars: Activity, Stars: Chromospheres, Stars: Individual: Hkaqr

Scientific paper

We report the discovery of cool, prominence-like material embedded in the hot corona of the rapidly rotating dMe flare/spot variable, HKAqr. Using these observations we demonstrate that, unlike the case of the rapidly rotating K dwarf, ABDor, these features form well below the co-rotation radius. Rather they have dimensions between 3-20 times those of the very largest solar prominences. At least seven clouds were detected during each stellar rotation and they have a lifetime of greater than the three nights spanned by our data.

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