Impact of the physical processes in the modeling of HD 49933

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Table 3:

Microscopic diffusion and radiative acceleration effects on the large frequency separation, $\nu _{\ell =0,n=14}$ and $\nu _{\ell =0,n=27}$ .
$M/M_{\odot}$	$T_{\rm eff}$	Z/X	$\Delta \nu$	$\nu _{\ell =0,n=14}$	$\nu _{\ell =0,n=27}$	Model
[K]		[ $\mu$ Hz]	[ $\mu$ Hz]	[ $\mu$ Hz]
1.35	6668	4.1 $\times$ 10^-3	94.0	1401	2627	6
1.3	6480	4.2 $\times$ 10^-3	85.7	1280	2401	7
1.25	6151	1.15 $\times$ 10^-2	76.3	1216	2209	8

Note 1. The models all have the same initial composition (X=0.7195, Y=0.2664 and thus Z/X=1.959 $\times$ 10^-2) and are stopped at the same luminosity ( $\log L/L_{\odot}=0.53$ ). Then the ages of the 1.25, 1.3 and 1.35 $M_{\odot}$ models are respectively 3.32, 1.79 and 0.54 Gyr.

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