Extended Data Fig. 2: Observed SiC emission towards W Aql.
From: Chemical tracers of a highly eccentric AGB–main-sequence star binary
(a) Zeroth moment map of SiC towards W Aql with contours at levels of 3 and 5σ. Transition details are given in Table 1. North is up and east is to the left. The position of the AGB star is indicated by the red star at (0,0) and the location of the F9 companion is indicated by the yellow star to the south-west. North is up and east is left. The white ellipse in the bottom left corner indicates the size of the synthesized beam. (b) Position-velocity diagram of SiC towards W Aql, taken with the same wide slit as used for SiN (Fig. 1), with a position angle of north 33∘ east. Dashed black contours are at levels of 3 and 5σ, a dotted white parabola is fit to the data (see ‘SiN and SiC’ in the ‘Data reduction’ section in the Methods), and a dash-dotted pink ellipse is plotted to emphasize the shape of the emission in the PV diagram. The position and LSR velocity of the AGB star is indicated by the red star and the horizontal yellow dotted line indicates the present offset of the F9 star.
