Fig. 4
Example HST/WFC3 images of O dwarf stars in the VFTS. The aperture of the Medusa fibres (1.̋2) is indicated by the inner green circles; the outer circles have twice this diameter to help guide the eye. VFTS 021 is shown as an example of a uncontaminated Medusa fibre, while the spectra of the others shown here are expected to have some degree of contamination from close-by companions.
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