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Table 2

Fundamental parameters of the observed faint solar analogue candidates.

HIP Best Teff ±   97 [Fe/H] ± 0.06 log g Mass Radius Age
(K) (K) (K) (dex) (dex) (M) (R) (Gyr)
991 5829 ± 85 5750 5875 ± 74 − 0.05 4.38 ± 0.06 0.99 ± 0.05 1.07 ± 0.05 6.2 ± 2.7
5811 5653 ± 67 5600 5696 ± 88 + 0.02 4.39 ± 0.05 0.96 ± 0.05 1.04 ± 0.04 7.9 ± 2.6
6089 5684 ± 20 5669 5698 ± 95 − 0.23 4.46 ± 0.04 0.90 ± 0.04 0.93 ± 0.03 6.9 ± 1.5
8853 6160 ± 50 6121 6192 ± 87 − 0.17 4.32 ± 0.04 1.09 ± 0.05 1.20 ± 0.04 4.10 ± 1.0
10663 6125 ± 26 6140 6102 ± 120 − 0.07 4.05 ± 0.03 1.24 ± 0.05 1.74 ± 0.04 4.4 ± 0.6
18941 5955 ± 90 6015 5887 ± 103 − 0.29 4.39 ± 0.07 0.96 ± 0.06 1.04 ± 0.04 6.4 ± 2.9
[29100] 6022 5824 ± 46 − 0.33 4.49 ± 0.05 0.95 ± 0.05 0.92 ± 0.04 3.3 ± 2.3
31845 5705 ± 132 5785 5596 ± 113 − 0.29 4.47 ± 0.06 0.89 ± 0.05 0.91 ± 0.04 7.2 ± 4.2
48272 5941 ± 14 5930 5950 ± 92 − 0.36 4.40 ± 0.04 0.93 ± 0.05 1.01 ± 0.04 6.8 ± 0.9
55619 5686 ± 69 5758 5653 ± 65 − 0.02 4.37 ± 0.05 0.96 ± 0.05 1.06 ± 0.04 8.0 ± 2.6
56870 5687 ± 108 5753 5599 ± 112 − 0.28 4.49 ± 0.05 0.89 ± 0.05 0.89 ± 0.04 6.4 ± 4.0
61835 5895 ± 88 5848 5979 ± 132 − 0.07 4.30 ± 0.05 1.02 ± 0.04 1.19 ± 0.05 7.1 ± 2.4
67692 (*) 5427 ± 37 − 0.04 3.83 ± 0.04 1.23 ± 0.04 2.25 ± 0.06 5.2 ± 0.4
69477 5744 ± 49 5726 5812 ± 193 + 0.02 4.46 ± 0.05 0.99 ± 0.05 0.98 ± 0.04 4.1 ± 2.7
[73234] 5979 5775 ± 101 − 0.17 4.28 ± 0.13 1.04 ± 0.06 1.22 ± 0.16 5.8 ± 2.0
[75685] 6163 5515 ± 44 − 0.02 4.40 ± 0.04 1.10 ± 0.04 1.10 ± 0.04 2.1 ± 1.5
107605 5835 ± 45 5809 5874 ± 120 − 0.20 4.30 ± 0.03 0.95 ± 0.04 1.14 ± 0.04 0.95 ± 1.8
[111826] 5655 5474 ± 47 + 0.09 4.45 ± 0.06 0.98 ± 0.05 0.98 ± 0.04 5.0 ± 3.1

Notes. The first column lists the HIPPARCOS number. The three faint solar analogues with atmospheric parameters compatible with those of the Sun within 1σ errors are highlighted in large bold numbers, and the other three within 2σ errors in small bold numbers. The brackets indicate stars with suspected significant reddening values (see Table 3). Column 2 gives the best Teff obtained by the weighted average of the values in Cols. 3 and 4. Column 3 displays corrected by the equation given in Sect. 5.3. Column 4 displays from the photometriccalibrations of Casagrande et al. (2010) and the colours in Table 1. Columns 5–9 to are self-explanatory. Three candidates listed in Table 1 are not listed here (HIP 13964, HIP 24742 and HIP 69232) because we could not derive their atmospheric parameters from PCA; their values lie outside the valid range of our calibrations. (*) and Teff from Hα agree for this candidate. These values are out of the PCA applicability range, and was found to be significantly hotter than and Teff from Hα. No reddening was estimated for this candidate and we consider its atmospheric parameters as unreliable.

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