Fig. 2: This image shows spatially resolved spectra of the lithium line, where a darker colour indicates a higher density of the line profiles. The spatially averaged profile is marked in black. The central positions of the 7Li and 6Li line components are marked at the top in black and red, respectively.
Karin Lind (MPA), Jorge Melendez (Department of Astronomy, University of Sao Paulo, Brasil), Martin Asplund (Mount Stromlo Observatory, Australian National University, Australia), Remo Collet (Mount Stromlo Observatory, Australian National University, Australia), Zazralt Magic (MPA)
Cayrel, R., Steffen, M., Chand, H., et al., "Line shift, line asymmetry, and the 6Li/7Li isotopic ratio determination", 2007, A&A, 473, L37