Extended Data Fig. 7: Properties of the galaxies and comparisons with other FRB hosts.
From: A fast radio burst source at a complex magnetized site in a barred galaxy
a, Hosts of FRB repeaters in the BPT diagram plotted with the SDSS DR8 MPA-JHU sample (black); parameter spaces of galaxies dominated by star formation and active galactic nuclei are separated by the dashed and solid black lines, respectively87,88. The host and background galaxies of FRB 20201124A are shown in red and yellow, respectively. b, The properties (FRB–galaxy offset in units of galaxy effective radius Re, gas-phase metallicity, sSFR and stellar mass) of the FRB 20201124A host galaxy (red star) compared with a literature sample of FRB hosts (available at https://web.archive.org/web/20211015143528/https://frbhosts.org/#explore) shown with dots (black, non-repeaters; red, repeaters). c, Emission lines from the background galaxy at z = 0.553 in the LRIS (blue) and ESI (red) spectra, with regions contaminated by the atmosphere of the Earth marked in green.
