Hydrodynamical simulations of convection-related stellar micro-variability - II. The enigmatic granulation background of the CoRoT target HD 49933

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Table 2:

Fitted parameters of Eq. (3) for the synthetic power spectra of the three hydrodynamical models.
Parameter	Hydrodynamical models
	S0	S1	Sun1
b	6.056	2.881	1.046
$\nu_1$	0.9593	1.259	1.295
$\alpha_1$	2.486	3.434	2.953
$\nu_2$	2.383	2.821	3.667
$\alpha_2$	8.061	9.278	8.035
a₁	0.4130	0.5389	2.149
u₁	1.266	1.674	3.252
w₁	0.09507	0.08464	0.02861
a₂	4.498	1.732
u₂	1.676	2.027
w₂	0.01155	0.02994
a₃	2.188	2.142
u₃	2.107	2.618
w₃	0.01217	0.004683

Background- and line-amplitudes are given in ppm²/ $\mu$ Hz, frequencies in mHz. Missing values for a line indicate that it was left out since unnecessary to obtain a satisfactory fit.

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