Implications of a turbulent convection model for classical Cepheids

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Table 7.

Stellar parameters obtained for the components of the OGLE LMC-CEP-1718 system from the evolutionary tracks are listed below.

Parameters	Initial^a	Final^b	Observations
M_p/M_⊙	4.28	4.25	4.27±0.04
M_s/M_⊙	4.24	4.21	4.22±0.04
R_p/R_⊙		29.6	27.8±1.2
R_s/R_⊙		32.6	33.1±1.3
log(L_p/L_⊙)		3.16	3.04±0.06
log(L_s/L_⊙)		3.15	3.18±0.06
T_eff,p (K)		6506	6310±150
T_eff,s (K)		6231	6270±160
age_p (Myr)		147.06
age_s (Myr)		154.14
[Fe/H]	−0.5
$χ_{p}^{2}$ $\chi _{p}^{2}$		2.66
$χ_{s}^{2}$ $\chi _{s}^{2}$		0.52

Low-metallicity model

M_p/M_⊙	4.28	4.27	4.27±0.04
M_s/M_⊙	4.24	4.21	4.22±0.04
R_p/R_⊙		25.8	27.8±1.2
R_s/R_⊙		33.2	33.1±1.3
log(L_p/L_⊙)		2.92	3.04±0.06
log(L_s/L_⊙)		3.18	3.18±0.06
T_eff,p (K)		6127	6310±150
T_eff,s (K)		6276	6270±160
age_p (Myr)		131.24
age_s (Myr)		150.06
[Fe/H]	−0.6
$χ_{p}^{2}$ $\chi _{p}^{2}$		2.75
$χ_{s}^{2}$ $\chi _{s}^{2}$		0.09

High-metallicity model

M_p/M_⊙	4.28	4.26	4.27±0.04
M_s/M_⊙	4.24	4.21	4.22±0.04
R_p/R_⊙		28.9	27.8±1.2
R_s/R_⊙		32.4	33.1±1.3
log(L_p/L_⊙)		3.11	3.04±0.06
log(L_s/L_⊙)		3.13	3.18±0.06
T_eff,p (K)		6444	6310±150
T_eff,s (K)		6158	6270±160
age_p (Myr)		147.91
age_s (Myr)		156.14
[Fe/H]	−0.3
$χ_{p}^{2}$ $\chi _{p}^{2}$		1.77
$χ_{s}^{2}$ $\chi _{s}^{2}$		1.18

Notes. The symbols have the same meanings as Table 3.

^(a)

Initial parameters considered to compute the evolutionary tracks.

^(b)

Obtained parameters from the computed evolutionary tracks.

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