6^Li in the atmosphere of GJ 117

(2) University of Oklahoma; 3); (3) Astronomical Observatory; (4) Hamburger Sternwarte; Belfast; Belgrade; D. J. Christian (1); D. Jevremovic (2; E. Baron (2) ((1) Queen's University Belfast; Germany)

arxiv: astro-ph/0509247 · v1 · submitted 2005-09-09 · 🌌 astro-ph

6^Li in the atmosphere of GJ 117

D. J. Christian (1) , M. Mathioudakis (1) , D. Jevremovic (2 , 3) , P. H. Hauschildt (4) , E. Baron (2) ((1) Queen's University Belfast , Belfast , UK

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(2) University of Oklahoma Norman OK USA (3) Astronomical Observatory Belgrade Serbia Montenegro (4) Hamburger Sternwarte Hamburg Germany)

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classification 🌌 astro-ph

keywords activedwarfactivityanalysisatmospherebeenbinarychromospherically

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We present high resolution VLT UVES observations of the active K dwarf GJ 117. 6^Li enhancement has been shown for energetic solar events, one chromospherically active binary, and several dwarf halo stars. Our analysis reveals the detection of 6^Li on this source with 6^Li/7^Li = 0.030+/-0.010. We found no significant contribution from other lines, including Ti I, in the Li profile of GJ 117 and a template star of similar spectral type and metallicity. We discuss the possibility for 6^Li production by spallation and find it to be consistent with the activity levels of the object.

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6^Li in the atmosphere of GJ 117

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