Astronomy & Astrophysics

Table 1: Effective temperatures and metal abundances observed for $\mu$ Ara. [Fe/H] ratios are given in dex. The references for the given values are given in Col. 3; they are followed by for spectrometric measurements and for photometric measurements.
Table 2: Mass, age, initial and actual chemical compositions, radii, geometrical and acoustic, of the star ( $R_{\star }$ and $T_{\star }$ ) and of the convective core ( $R_{\rm cc}$ and $t_{\rm cc}$ , when necessary) for stellar models that satisfy the observational constraints for $\mu$ Ara. The model AC includes accretion, OM is overmetallic. Initial mass fractions (X₀, Y₀, Z₀) on the main sequence are given for the core and the envelop, which has been enhanced by pollution in the AC case. For the final model, the surface abundances are given (X, Y, Z).
Table 3: Difference of effective temperature and luminosity between sample models, AC or OM, and new models with $\Delta \nu _0=90$ $\mu$ Hz but with a variation of either the initial helium fraction or the mixing-length parameter. The effective temperatures are given in K.
Table 4: Variation of the effective temperature, luminosity and average large separation for models AC and OM when subjects to a small variation of mass or age. The mass variation are given in $M_{\odot }$ , the age in Myr the effective temperatures in K and the average large separation in $\mu$ Hz.