Table 4: Fitting of the whole range without the constant term: coefficients for T = 1370-1820 Myr. Units of z, $\alpha$ and $\beta$ coefficients are [pc], [km s^-1] and [10²⁶ cm²/s], respectively.
z $\alpha _{xx}$ $\alpha _{yy}$ $\alpha _{zz}$ $\beta _{xx}$ $\beta _{yy}$ $\beta _{zz}$ $\chi^2_x$ $\chi^2_y$ $\chi^2_z$

-400 0.29 0.18 -0.08 -0.02 0.06 -0.04 0.0022 0.0003 0.0009

-200 -2.62 0.01 -1.62 -0.09 0.01 -0.08 0.0049 0.0002 0.0036

200 -2.22 -0.10 0.03 -0.04 -0.03 0.05 0.0037 0.0005 0.0015

400 -0.57 -0.04 -0.18 -0.00 -0.00 0.02 0.0006 0.0001 0.0008

**Table 4:** Fitting of the whole range without the constant term: coefficients for T = 1370-1820 Myr. Units of z, $\alpha$ and $\beta$ coefficients are [pc], [km s^-1] and [10²⁶ cm²/s], respectively.
z	$\alpha _{xx}$	$\alpha _{yy}$	$\alpha _{zz}$	$\beta _{xx}$	$\beta _{yy}$	$\beta _{zz}$	$\chi^2_x$	$\chi^2_y$	$\chi^2_z$
-400	0.29	0.18	-0.08	-0.02	0.06	-0.04	0.0022	0.0003	0.0009
-200	-2.62	0.01	-1.62	-0.09	0.01	-0.08	0.0049	0.0002	0.0036
200	-2.22	-0.10	0.03	-0.04	-0.03	0.05	0.0037	0.0005	0.0015
400	-0.57	-0.04	-0.18	-0.00	-0.00	0.02	0.0006	0.0001	0.0008

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