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 -

**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	-

Source LaTeX | All tables | In the text

	1 Introduction
	2 Observations
	3 The SIMECA code and the envelope parameters used for the modeling of alpha Ara
	4 Results
	5 Discussion
	6 Conclusion
	References