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Caption: Figure 18.
PHANGS–ALMA on the star-forming main sequence and size–mass relation. PHANGS–ALMA targets in SFR–M ⋆ and R e–M ⋆ space. PHANGS–ALMA targets appear as red hexagons. For comparison, galaxies observed as part of the xCOLD GASS survey are represented by blue squares (Saintonge et al. 2017). We show a large sample of local galaxies as gray dots. In the SFR–M ⋆ space these are all galaxies with d < 50 Mpc and measurements from Leroy et al. (2019). In the lower panel, we combined masses from Leroy et al. (2019) with sizes from Muñoz-Mateos et al. (2015), with the latter being the limiting quantity. Black lines show scaling relations relevant to late-type galaxies. In the top panel we show the star-forming main sequence as a solid black line, with the specific formula from Leroy et al. (2019). In the bottom panel we show the r-band result for late-type galaxies from Lange et al. (2015). We show the distribution of offsets from both relations in Figure 17.
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