6^Li in the atmosphere of GJ 117

Abstract

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.

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

References in corpus (5)

• The NextGen Model Atmosphere grid for $3000\le \Teff \le 10000\K$
• The Mass of the Convective Zone in FGK Main Sequence Stars and the Effect of Accreted Planetary Material on Apparent Metallicity Determinations
• A Search for ${}^6$Li in Stars with Planets
• New measurement of the Lithium-6/Lithium-7 isotopic ratio in the extra-solar planet host star HD82943 and line blending in the Li 6708 A region
• Parallel Implementation of the PHOENIX Generalized Stellar Atmosphere Program. III: A parallel algorithm for direct opacity sampling

Cited by in corpus (4)

• Solving the Cosmic Lithium Problems with Gravitino Dark Matter in the CMSSM
• Is 6-Li in metal-poor halo stars produced in situ by solar-like flares?
• Astrophysics in 2006
• 6^Li in the atmosphere of GJ 117 Revisited