Fig. 6.

Left: outflow velocity vs. star formation rate surface density observed in apertures 1 and 2 of HZ4 (orange circles) and in the stacked approximately kiloparsec-scale star-forming regions in z ∼ 2 main-sequence galaxies (blue lines; Davies et al. 2019). Right: local neutral mass-loading factor as a function of ΣSFR for HZ4 (orange circle) and stacked galaxies from the MANGA survey based on the Na D λλ5889,5895 Å absorption doublet (green diamonds; Roberts-Borsani & Saintonge 2019).
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