Table 4: Best model parameters for the alpha Ara circumstellar environment obtained by fitting the visibilities and the 2003 Pa$\beta $ line profile with SIMECA.
Parameter/result Value Uncertainty
Distance 105 pc 10 pc
Inclination angle i 45 5
Photospheric density ( $\rho_{\rm phot}$) \(1.2\times 10 ^{-12} \) g cm-3 linked to C1
Photospheric expansion velocity 0.07 km s-1 0.01
Equatorial rotation velocity 300 km s-1 20
Equatorial terminal velocity 170 km s-1 20
Polar terminal velocity 2000 km s-1 500
Polar mass flux \(1.7 \times10 ^{-9} ~M_{\odot } \) year-1 sr-1 \(0.5 \times10 ^{-9} \)
m1 0.3 0.1
m2 0.45 0.05
C1 30 linked to $\rho_{\rm phot}$
Mass of the disk \(2.3\times 10 ^{-10} ~M_{\odot } \) -
Mass loss \(6.0\times 10 ^{-7} ~M_{\odot } \) year-1 -


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