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Table 2

Geometric model fit diameters of MWC 297 in the continuum and the center of the Brγ emission line.

Wavelength Component C1 Diameter of C1 Component C2 Diameter of C2 Flux ratio
range (dominant compact core) (halo) (C1/C2)

Continuuma Gaussian 4.63 ± 0.21 mas Gaussian  ≳ 22 masc 4.6
Continuuma Ring (20%)b 4.47 ± 0.20 mas Gaussian  ≳ 19 masc 3.6
Brγ center Gaussian 12.6 ± 0.75 masd

Notes. 

(a)

Average over continuum wavelengths between 2.147 and 2.194 μm (except the line region).

(b)

Inner radius of a ring model with a ring width of 20% of the inner ring radius.

(c)

Due to the lack of data at small spatial frequencies, the size of the extended halo component is not well constrained by our measurements. Therefore, we can only give a rough estimate: 22(19) ± 5 mas or larger, but smaller than the AMBER AT FOV of 250 mas.

(d)

Continuum-compensated diameter (see text).

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