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Table 6

Structural parameters and metallicities of the candidate Cepheid groups.

ID x y z R G D N s P σ(P) Δ[Fe/H] σ(Δ[Fe/H])
(kpc) (kpc) (kpc) (kpc) (kpc) (kpc) (kpc) (days) (days) (kpc-3)

I 0.766 –1.612 –0.033 6.374 0.384 0.475 1.213 20 8.69 5.17 16.8 –0.039 0.010
II –0.939 –1.562 –0.035 6.447 0.286 0.430 0.827 7 8.69 3.78 4.8 –0.003 0.004
III –1.636 –0.655 –0.003 7.466 0.775 0.560 1.661 37 7.48 7.35 37.7 –0.063 0.010
IV 0.016 –0.503 –0.034 7.437 0.503 0.501 1.879 52 6.91 5.20 45.7 –0.009 0.008
V 2.182 –0.137 0.044 8.103 0.464 0.371 0.847 7 8.74 5.84 8.8 0.009 0.002
VI 1.549 0.918 –0.099 8.993 0.133 0.186 0.497 6 5.30 1.34 4.2 0.033 0.003
VII 2.608 1.167 0.050 9.473 0.396 0.190 0.654 11 6.72 3.51 4.7 0.062 0.007
VIII 1.732 1.515 0.014 9.613 0.219 0.261 0.641 11 5.08 2.37 4.2 0.040 0.009
IX 2.511 1.777 –0.008 10.036 0.144 0.226 0.621 7 5.38 0.79 4.4 0.046 0.006
X 3.269 1.754 –0.047 10.231 0.187 0.230 0.449 6 5.63 1.60 6.8 0.033 0.007

Notes. Structural parameters of the ten candidate Cepheid groups identified in Sect. 4. From left to right Col. 1 gives the identification number, while Cols 2–4 give the Galactic coordinates (x,y,z) of the barycenter. Columns 5–7 give the Galactocentric radius of the barycenter together with the Galactocentric distance of both the inner and the outer edge of the Cepheid group. Column 8 gives the diameter of the CG, while Col. 9 lists the number of Cepheid per CG. Columns 10 and 11 give the mean period and its intrinsic dispersion, while Col. 12 gives the density. Columns 13 and 14 give the mean residual iron abundance and its intrinsic dispersion.

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