Proper motion analysis of the radio continuum sources in G035.02+0.35. Left panel: 2014 C-band map (contours) processed under similar conditions of uv-coverage and restoring beam size as the 2009 X-band map of Cyganowski et al. (2011), for comparison. Contour levels are indicated to the bottom at multiples of the 1σ rms; the beam size is shown in the bottom left corner. Radio continuum labels, jet axis, and ticks are the same as in the Fig. 1. Red and blue crosses mark the centroid positions of CM1, CM2, CM3, and CM4 in May 2014 and 2009, respectively, as obtained from a two-dimensional Gaussian fit of the C- and X-band maps (X-band positions from Table 2 of Cyganowski et al. 2011). Individual centroids have been registered by aligning the positions of CM2 in 2014 and 2009. Right panels: zoom-in near to the centroids of CM3 (top), CM1 (middle), and CM4 (bottom). The extent of each map is the same; angular offsets (in arcsec) are referred to the phase center. The size of each cross quantifies the uncertainty in the centroid position (see Sect. A). For CM1, CM3, and CM4, we indicate the magnitude of the proper motions (and uncertainty) inferred from the displacement of their centroids between the two epochs. The dotted line and the gray shadow mark the jet axis and its 3σ uncertainty (±1.8°), respectively.
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