GRAVITY chromatic imaging of η Car’s core - Milliarcsecond resolution imaging of the wind-wind collision zone (Brγ, He I)

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Table 2.

Stellar parameters of the CMFGEN models.

Parameter	Groh et al. (2012a)	This work
T_eff	9.4 kK	13.5 kK
log(L/L_⊙)^a	6.7	7.1
Y^b	0.55%	0.50%
log(Ṁ/M_⊙/year)	−3.1	−3.4
β^c	1.0	1.0
f_v^d	0.1	0.1
v_∞^e	420 km s⁻¹	420 km s⁻¹

Notes.β, f_v, and v_∞ were fixed parameters in our grid of models. The used values were taken from Groh et al. (2012a).

^(a)

log(L/L_⊙) is scaled to match the K-Band flux.

^(b)

Helium abundance in mass fraction.

^(c)

Exponent of the wind-velocity law.

^(d)

Volume filling factor.

^(e)

Stellar wind’s terminal velocity.

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