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Table 6

Table of fitting parameters, modelling the Fe I ground level absorption lines with two components.

Periods 2003–2004 2004–2007 2007–2008 2008–2009 2009–2010 2010–2011 2013–2014 2014–2015 2015–2016 2016–2017
Nb. Obs. 215 42 198 417 54 207 453 60 190 1080
Comp 2 fixed to v = 20.39 km s−1
Vcomp,1, FeI 0 19.48 20.08 19.72 ± 0.20 19.73 19.84 19.81 19.48 ± 0.10 19.96 ± 0.11 19.85 ± 0.20 19.78
bcomp,1, FeI 0 0.04 0.16 ± 0.05 <0.07 0.06 ± 0.02 <0.09 <0.06 <0.05 0.09 <0.14 0.20
bcomp,2, FeI 0 0.55 1.50 0.87 0.77 ± 0.03 0.65 0.99 ± 0.08 0.76 1.17 0.43 0.19
log Ncomp 1, FeI 0 12.02 ± 0.03 12.36 ± 0.06 12.07 12.01 ± 0.04 12.20 12.03 11.86 ± 0.07 12.04 11.95 11.79 ± 0.09
log Ncomp 2, FeI 0 12.28 11.94 12.24 12.29 12.25 12.29 ± 0.02 12.12 ± 0.02 12.00 11.96 ± 0.10 12.20
χ2 (d.o.f.=137) 142.86 143.03 142.63 154.14 139.22 140.21 144.99 142.70 138.39 137.85

Comp. 1 fixed to v = 19.77 km s−1
Comp. 2 fixed to v = 20.39 km s−1
bcomp,1, FeI 0 0.14 ± 0.02 0.06 ± 0.02 0.05 ± 0.03 0.08 ± 0.02 <0.04 <0.04 0.08 <0.12 0.06 0.28 ± 0.15
bcomp,2, FeI 0 0.81 ± 0.03 0.90 ± 0.08 0.91 ± 0.05 0.82 ± 0.03 0.63 ± 0.13 1.00 ± 0.05 1.01 ± 0.05 0.98 ± 0.10 0.43 ± 0.15 0.20
log Ncomp 1, FeI 0 12.16 ± 0.02 12.19 ± 0.05 12.09 ± 0.06 12.05 ± 0.03 12.19 ± 0.10 12.04 ± 0.06 11.99 ± 0.04 11.94 ± 0.09 11.92 ± 0.06 11.82 ± 0.03
log Ncomp 2, FeI 0 12.18 ± 0.01 12.21 ± 0.02 12.23 ± 0.02 12.27 ± 0.01 12.25 ± 0.03 12.29 ± 0.02 12.04 ± 0.02 12.08 ± 0.03 11.99 ± 0.03 12.19 ± 0.03
χ2 (d.o.f.=138) 153.79 147.04 143.11 156.63 139.24 140.23 149.60 143.93 138.39 137.87

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