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Figure 1:
EWs obtained with the ARES software as a function of EWs computed using IRAF. The dots indicate a star with
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Figure 2: Difference between our spectroscopic values and literature values as a function of literature values for the effective temperature ( left), the logarithm of the surface gravity in cgs units ( centre) and metallicity ( right). |
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Figure 3: Difference between our spectroscopic values and values from Luck & Heiter (2007) as a function of Luck & Heiter (2007) values for the effective temperature ( left), the logarithm of the surface gravity in cgs units ( centre) and metallicity ( right) for the 72 stars in common between the samples. |
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Figure 4: Distribution of metallicities of all stars in our sample with mean, median and trimean values of -0.12, -0.09 and -0.095 dex, respectively. The metallicity of 20 giants with an announced companion in the literature (see text for selection criteria) are plotted with the dashed histogram. The latter distribution is normalised to the total number of giants in our sample. These giants have mean, median and trimean metallicity values of -0.05, +0.025 and -0.015 dex, respectively. |
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Figure 5: The intrinsic stellar FWHM of spectral lines as a function Gray's total broadening, for 51 stars in common between our sample and Gray (1989). The best fit (Eq. (1)) is shown as the solid line, while the best fit obtained by Fekel (1997) is shown as the dashed line. |
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Figure 6:
Log g vs.
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Figure 7:
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Figure 8:
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