Fig. 2: Summary of SED fitting.
From: A fast-rotator post-starburst galaxy quenched by supermassive black-hole feedback at z = 3
a,b, Stellar-population surface mass-density map (a) and mass-weighted age map (b) from full spectral fitting of the low-resolution spectroscopy data, showing that most of GS-10578 consists of 0.5-Gyr-old stars. Merging satellites have lower mass-to-light ratios than GS-10578 and do not contribute to the mass-weighted properties. c, The SFH from the same models, integrated over the 2D map, shows the main episode of star formation occurred 0.5 Gyr ago. The solid line and shaded region are the median and 1σ uncertainty from the 658 SFHs of each individual spaxel. The cyan diamond and black circle are the fiducial mass outflow rates from [O iii] and Na i, respectively, with the error bars representing systematic uncertainties. Unlike the ionized-gas outflow, the neutral-gas outflow has a mass loading high enough to stop star formation. d, SED of the individual spaxels summed inside a circular aperture of radius 1.15 arcsec, for both the NIRSpec/IFS data (black) and the best-fitting model (red). We also show the aperture photometry as error bars (representing the 1σ measurement uncertainty). The model does not include an AGN. Therefore, it does not capture the emission lines or the flux redder than 6 μm, which is dominated by host-dust emission from the AGN torus. For a model including an AGN torus, see Methods.
