Fig. 1: The jet structure of Cen A compared with M87.
From: Event Horizon Telescope observations of the jet launching and collimation in Centaurus A
a, The large-scale jet of Cen A from an 8 GHz (λ 3.7 cm) TANAMI47 observation in November 20113 on a logarithmic colour scale. b, Our final EHT image from April 2017, blurred to the nominal resolution for a uniform weighting of the visibilities. The reconstruction is based on the rPICARD data and is shown on a square-root scale, where values below a brightness temperature of 3 × 108 K are clipped, due to a lower dynamic range compared with the longer-wavelength observations. An unclipped and unconvolved version of this image is shown in Fig. 2. The dashed lines between a and b indicate the zoom-in of the EHT image with respect to the cm VLBI jet. c, The M87 jet at 43 GHz (λ 7 mm) from a Very Long Baseline Array (VLBA) observation in June 20139,26 on a logarithmic scale. North is up and east is to the left. The physical, linear scales of the full field of views shown in the three images are 2 pc for TANAMI (a), 0.007 pc for the EHT (b) and 0.6 pc for the VLBA (c). The beams are shown in the bottom right corner of each image.
