6^Li in the atmosphere of GJ 117

Details 6^Li in the atmosphere of GJ 117 6^Li in the atmosphere of GJ 117

2005-09-09

arxiv.org/abs/astro-ph/0509247v1

Astrophys.J.632:L127-L130,2005

Astronomy and Astrophysics

Astrophysics

14 Pages, 5 figures, 1 Table; accepted ApJ Letters

Scientific paper

10.1086/497688

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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