Sky maps of Rf for CO(1−0) (upper panels) and CO(2−1) (lower panels) observations. Units are Jy beam-1 km s-1 arcsec. From left to right: all velocities, | Vx | < 2 km s-1 and | Vx | > 2 km s-1. The circles at R = 3.5′′ correspond to the enhancement seen by Winters et al. (2007) in the narrow velocity component of the CO(2−1) data. The projection of the star axis on the sky plane (making an angle of 13° with the line of sight) and the axis from which the stellar longitude ω is measured (positive clockwise) are shown as black arrows.
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