Table 2: Stellar parameters obtained from the fits for different cases. Case A is obtained ignoring veiling effects and gravitational darkening; Case B is obtained by accounting only for the veiling effects; for Cases C, D, and E, veiling effects and gravitational darkening are taken into account with a relative angular speed of the star at 80, 90, and 95%, respectively, of its break-up velocity (see Sect. 5).
Case A B

$T_{\rm eff}$ (kK) 17.5 $\pm$ 1 19.1 $\pm$ 1

$\log~g$ (cgs) 3.30 $\pm$ 0.10 3.91 $\pm$ 0.10

$v\sin~i$ (km s^-1) 176 $\pm$ 5 167 $\pm$ 5

Case C D E

$\Omega \over \Omega_{\rm c}$ 0.80 0.90 0.95

$T_{\rm eff}$ (kK) 19.6 $\pm$ 1.5 19.8 $\pm$ 1.5 20.2 $\pm$ 1.5

$\log~g$ (cgs) 4.04 $\pm$ 0.15 4.08 $\pm$ 0.15 4.11 $\pm$ 0.15

$v\sin~i$ (km s^-1) 170 $\pm$ 10 173 $\pm$ 10 177 $\pm$ 10

$V_{\rm eq}$ (km s^-1) 312 $\pm$ 20 381 $\pm$ 25 453 $\pm$ 24

i ( $^{\circ}$ ) 33 $\pm$ 3 27 $\pm$ 2 23 $\pm$ 2

$T_{\rm pol}$ (kK) 20.6 $\pm$ 1.3 21.3 $\pm$ 1.4 22.2 $\pm$ 1.3

$\log~g_{\rm pol}$ (cgs) 4.08 $\pm$ 0.12 4.13 $\pm$ 0.12 4.17 $\pm$ 0.12

$R_{\rm pol}$ ( $R_\odot$ ) 3.93 $\pm$ 0.70 3.67 $\pm$ 0.66 3.55 $\pm$ 0.64

$R_{\rm eq}$ ( $R_\odot$ ) 4.62 $\pm$ 0.83 4.68 $\pm$ 0.83 4.80 $\pm$ 0.87

M ( $M_\odot$ ) 6.81 $\pm$ 0.81 6.81 $\pm$ 0.80 6.97 $\pm$ 0.85

L ( $L_\odot$ ) 3.35 $\pm$ 0.21 3.32 $\pm$ 0.21 3.34 $\pm$ 0.22

$f_{\rm rot}$ (c d^-1) 1.35 $\pm$ 0.35 1.63 $\pm$ 0.40 1.88 $\pm$ 0.46

dist (pc) 205 $\pm$ 70 228 $\pm$ 80 248 $\pm$ 85

**Table 2:** Stellar parameters obtained from the fits for different cases. Case A is obtained ignoring veiling effects and gravitational darkening; Case B is obtained by accounting only for the veiling effects; for Cases C, D, and E, veiling effects and gravitational darkening are taken into account with a relative angular speed of the star at 80, 90, and 95%, respectively, of its break-up velocity (see Sect. 5).
Case	A	B
$T_{\rm eff}$ (kK)	17.5 $\pm$ 1	19.1 $\pm$ 1
$\log~g$ (cgs)	3.30 $\pm$ 0.10	3.91 $\pm$ 0.10
$v\sin~i$ (km s^-1)	176 $\pm$ 5	167 $\pm$ 5
Case	C	D	E
$\Omega \over \Omega_{\rm c}$	0.80	0.90	0.95
$T_{\rm eff}$ (kK)	19.6 $\pm$ 1.5	19.8 $\pm$ 1.5	20.2 $\pm$ 1.5
$\log~g$ (cgs)	4.04 $\pm$ 0.15	4.08 $\pm$ 0.15	4.11 $\pm$ 0.15
$v\sin~i$ (km s^-1)	170 $\pm$ 10	173 $\pm$ 10	177 $\pm$ 10
$V_{\rm eq}$ (km s^-1)	312 $\pm$ 20	381 $\pm$ 25	453 $\pm$ 24
i ( $^{\circ}$ )	33 $\pm$ 3	27 $\pm$ 2	23 $\pm$ 2
$T_{\rm pol}$ (kK)	20.6 $\pm$ 1.3	21.3 $\pm$ 1.4	22.2 $\pm$ 1.3
$\log~g_{\rm pol}$ (cgs)	4.08 $\pm$ 0.12	4.13 $\pm$ 0.12	4.17 $\pm$ 0.12
$R_{\rm pol}$ ( $R_\odot$ )	3.93 $\pm$ 0.70	3.67 $\pm$ 0.66	3.55 $\pm$ 0.64
$R_{\rm eq}$ ( $R_\odot$ )	4.62 $\pm$ 0.83	4.68 $\pm$ 0.83	4.80 $\pm$ 0.87
M ( $M_\odot$ )	6.81 $\pm$ 0.81	6.81 $\pm$ 0.80	6.97 $\pm$ 0.85
L ( $L_\odot$ )	3.35 $\pm$ 0.21	3.32 $\pm$ 0.21	3.34 $\pm$ 0.22
$f_{\rm rot}$ (c d^-1)	1.35 $\pm$ 0.35	1.63 $\pm$ 0.40	1.88 $\pm$ 0.46
dist (pc)	205 $\pm$ 70	228 $\pm$ 80	248 $\pm$ 85

Source LaTeX | All tables | In the text

	1 Introduction
	2 History and long-term variability
	3 Observations and data reduction
	4 The visible and near infrared spectra
	5 Fundamental parameters
	6 Short-term variability
	7 Light variability: Hipparcos photometry
	8 Discussion
	9 Conclusion
	References