Implications of a turbulent convection model for classical Cepheids

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Table 3.

Stellar parameters obtained for the components of the OGLE LMC-CEP-0227 system from the evolutionary tracks are listed below.

Parameters	Initial^a	Final^b	Observations
M_p/M_⊙	4.195	4.166	4.165±0.032
M_s/M_⊙	4.165	4.136	4.134±0.037
R_p/R_⊙		34.86	34.92±0.29
R_s/R_⊙		44.71	44.85±0.34
log(L_p/L_⊙)		3.136	3.158±0.049
log(L_s/L_⊙)		3.082	3.097±0.047
T_eff,p (K)		5953	6050±160
T_eff,s (K)		5093	5120±130
age_p (Myr)		158.18
age_s (Myr)		161.13
[Fe/H]	−0.5
$χ_{p}^{2}$ $\chi _{p}^{2}$		0.76
$χ_{s}^{2}$ $\chi _{s}^{2}$		0.56

Model with inverted mass ratio

M_p/M_⊙	4.165	4.137	4.165±0.032
M_s/M_⊙	4.195	4.166	4.134±0.037
R_p/R_⊙		34.84	34.92±0.29
R_s/R_⊙		44.85	44.85±0.34
log(L_p/L_⊙)		3.124	3.158±0.049
log(L_s/L_⊙)		3.099	3.097±0.047
T_eff,p (K)		5912	6050±160
T_eff,s (K)		5138	5120±130
age_p (Myr)		160.84
age_s (Myr)		158.44
[Fe/H]	−0.5
$χ_{p}^{2}$ $\chi _{p}^{2}$		1.13
$χ_{s}^{2}$ $\chi _{s}^{2}$		0.15

Low-metallicity model

M_p/M_⊙	4.195	4.165	4.165±0.032
M_s/M_⊙	4.165	4.134	4.134±0.037
R_p/R_⊙		34.96	34.92±0.29
R_s/R_⊙		44.97	44.85±0.34
log(L_p/L_⊙)		3.169	3.158±0.049
log(L_s/L_⊙)		3.129	3.097±0.047
T_eff,p (K)		6058	6050±160
T_eff,s (K)		5220	5120±130
age_p (Myr)		154.38
age_s (Myr)		157.50
[Fe/H]	−0.6
$χ_{p}^{2}$ $\chi _{p}^{2}$		0.26
$χ_{s}^{2}$ $\chi _{s}^{2}$		1.09

Notes. Here, M, R, L, and T_eff refer to mass, radius, luminosity, and effective temperature, respectively. The subscripts p and s refer to the primary and secondary components, respectively.

^(a)

Initial parameters considered to compute the evolutionary tracks.

^(b)

Obtained parameters from the computed evolutionary tracks.

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