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Table 8

Astrophysical properties of the HW CMa system.

Primary Secondary
Absolute dimensions:
    M (M⊙) 1.721 ± 0.011 1.781 ± 0.012
    R (R⊙) 1.643 ± 0.018 1.662 ± 0.021
    log g (cgs) 4.242 ± 0.010 4.247 ± 0.011
    vsini ( km s-1)a 12.0 ± 1.0 12.0 ± 1.0
    vsync ( km s-1)b 3.9 ± 0.1 4.0 ± 0.1
    vpsync ( km s-1)c 11.1 ± 0.1 11.2 ± 0.2
    vperi ( km s-1)d 13.7 ± 0.2 13.8 ± 0.2
Radiative and other properties:
    Teff (K) 7560 ± 150 7700 ± 150
    Mbol (mag) 2.488 ± 0.089 2.383 ± 0.088
    log L/L⊙ 0.898 ± 0.036 0.940 ± 0.035
    BCV (mag)  + 0.03 ± 0.10  + 0.03 ± 0.10
    MV (mag) 2.46 ± 0.13 2.35 ± 0.13
    Distance (pc) 306 ± 15
    V − MV (mag) 7.43 ± 0.10
    [Fe/H]e  + 0.33 ± 0.10  + 0.28 ± 0.10
Photometric indices:
    Vf 9.996 ± 0.012 9.892 ± 0.011
    (b − y)f 0.139 ± 0.005 0.118 ± 0.005
    m1f 0.225 ± 0.011 0.231 ± 0.011
    c1f 0.817 ± 0.016 0.858 ± 0.016
    E(b − y) 0.026 ± 0.010

Notes.  The bolometric corrections (BCV) are adopted from Flower (1996), along with with Teff ⊙  = 5780 K, and Msbol ⊙  = 4.73 (see Torres 2010). An additional error contribution of 0.10 mag is added in quadrature to the BCV uncertainty propagated from the temperature uncertainties.

(a)

Measured projected rotational velocity.

(b)

vsini expected for synchronous rotation.

(c)

vsini expected for pseudo-synchronous rotation.

(d)

Expected vsini if synchronized at periastron.

(e)

Values representative of the surface layers only.

(f)

Not corrected for interstellar absorption/reddening.

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