Fig. 5: Absorption-line kinematics of GS-10578.
From: A fast-rotator post-starburst galaxy quenched by supermassive black-hole feedback at z = 3
a–d, Voronoi-binned 2D maps, showing the empirical S/N (a), stellar velocity v⋆ (d), instrument-deconvolved velocity dispersion σ⋆ (b) and neutral-gas velocity vNa i (c). In these four panels the dashed ellipses trace the shape and Re of the best-fitting Sérsic model to the stellar continuum. a also shows the contours of the Voronoi bins (white dotted lines). d shows an enlarged region of the RGB image in Fig. 1a, for comparison. d shows clear evidence for ordered rotation. The rotation axis is along the minor axis of the stellar distribution. e, Spectrum of a Voronoi bin, illustrating the Hδ and Hγ stellar absorption features; the spatial ___location of this bin is highlighted by the dotted white square labelled (e) in d. f, Same as e, but for the Voronoi bin labelled (f) in d. The two Voronoi bins (e) and (f) were chosen to highlight the velocity offset that we attribute to stellar rotation. The line colours are the same as Fig. 1f–i.
