Extended Data Fig. 8: Reanalysis of sample galaxies of submm galaxies measured with R_e/ΔR_e > 3 in ref. ¹⁶.

a,b, Distribution of Spergel ν and axis ratio q measured using Spergel modelling for the galaxies in ref. ¹⁶, compared with the subsample of Σ_SFR-extended galaxies in our sample. c,d, Comparison of Sérsic index n and q measurements between Spergel fitting and those derived from ref. ¹⁶. Data points are colour-coded by S/N_beam. The vertical and horizontal bars indicate the median uncertainties derived from Spergel fitting and those reported in ref. ¹⁶, respectively. The dashed lines indicate the 1:1 line. e,f, Similar to Fig. 2 but showing the triaxial modelling results for the sample galaxies in ref. ¹⁶ with parameters fitted using Spergel profile. The measured ⟨B/A⟩ and ⟨C/A⟩ are 0.85 ± 0.08 and 0.47 ± 0.05, respectively.