Fig. 4.
3He (red) and 4He (blue) abundances of the analyzed stars plotted against effective temperature. Stars showing anomalous helium line profiles (see Sect. 5.4) are marked with squares. Triangles represent 3He stars for which we were able to match the helium line profiles. In addition, both He-normal comparison stars (HD 4539 and CD-35° 15910) are marked with crosses. Their 3He upper limits (see Table 4) are not displayed.
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