Fig. 1: Summary of GS-10578 observations.
From: A fast-rotator post-starburst galaxy quenched by supermassive black-hole feedback at z = 3
a, NIRCam false-colour image. The grey dashed square is the field of view of NIRSpec/IFS (with dithering). The solid white contour is a stellar isophote from NIRSpec/IFS prism spectroscopy. The red dashed ellipse is the best-fitting deconvolved model, with semimajor axis 1Re. The cyan contours are rest-frame UV from NIRCam F090W, which display the complex morphology, probably due to foreground dust. The orange and blue contours are isosignificance lines for the Hα–[N ii] and Hβ–[O iii] blended lines, from the prism data. Nebular emission is significantly more extended than the stellar light, indicating the ability of mergers and feedback to enrich the circumgalactic medium. b, Detail of the central region of a; the dashed black square outlines a single NIRSpec spaxel, whose spectrum is reproduced in panels f–i. c, Comparing the model isophote (red dashed ellipse) to NIRCam isophote morphology, there is a clear wavelength-dependent offset to the north-west. d, Brightest [O iii] emission from g235h/f170lp data, showing a slight offset from the centre of the stellar emission (red dot, distance <1 spaxel) and a notably different position angle, almost π/2 compared to the stars. e, Neutral gas Na i absorption, which is clearly asymmetric and located where the rest-UV photometry is faintest. f, Single-spaxel spectrum centred on the Hβ–[O iii] region, showing the data (grey), best-fitting continuum and nebular-line model (red and blue, respectively), and their sum (orange). g, Same as f, but centred on Hα–[N ii]. h, Same as f, but centred on Hδ and Hγ. i, Same as f, but centred on the Na I doublet. The horizontal bar in the top right corner of each panel is δv = 500 km s−1. f and g show the complex, multi-component emission-line profile of [O iii] and Hα [N ii]. h and i show the same spaxel. The vertical dotted lines mark the position of the stellar Hδ, Hγ and Na i-doublet absorption. The deep Na i absorption, blueshifted with respect to the stars, betrays the presence of a neutral-gas outflow. Dec., declination; FOV, field of view; RA, right ascension.
