Fig. 1: NIRCam imaging and NIRSpec spectroscopic data of the galaxy.
From: A core in a star-forming disc as evidence of inside-out growth in the early Universe
Top left: the (F444W–F277W–F115W) colour-composite image of the galaxy, where the central core and disc are prominent. A 1 kpc scale bar (corresponding to 0.19 arcsec), the F444W PSF and the position of the NIRSpec slit are overplotted. Top right: the total radial (azimuthally averaged) surface brightness (SB) profile of the core, disc and clump in the F356W band, where the pink points are the observational data and the black line is the PSF-convolved best-fit three-component model (consisting of the core, disc and clump). The error bars correspond to the error propagated through from the error maps (that is, the standard deviation). The intrinsic best-fit Sérsic profiles of the core and disc components are shown as red and blue lines, respectively. The off-centred clump at a distance of 1.4 kpc is indicated with a purple arrow. The grey dashed and dotted lines correspond to the ePSF and the WebbPSF, respectively, in the F356W band. Bottom: the two-dimensional and one-dimensional NIRSpec R100 prism spectra, with the position of notable detected emission lines overplotted, which indicates that this galaxy is dominated by stellar emission. The two-dimensional spectrum includes the slit position and the colour bar corresponds to the signal-to-noise ratio (S/N). The one-dimensional spectrum shows flux against rest-frame wavelength. The errors on the one-dimensional spectrum correspond to the standard deviation of the mean signal.
