We identify galaxies hosting ionised-gas high-velocity outflows from the complete sample of medium resolution (R1000) JWST/NIRSpec MSA spectroscopy taken as part of the JWST Advanced Deep Extragalactic Survey (JADES). From a total sample of 1087 OIII5007 emitters we identify 40 galaxies with a blue-side broadened OIII5007 line at z=2. 5-9. Of these, 34 are strong outflow candidates whilst 6 sources have broadening potentially driven by rotating clumps. Our outflow candidate sample is mainly composed of star-forming galaxies, including ~65% starbursts, which span the stellar mass range log10 (M*/Msun) =7. 5-11. 0. It also includes two candidate type-2 active galactic nuclei (AGN) and a 'little red dot' (LRD). We report a median outflow velocity of 531 (+146) (-159) km/s and an overall incidence rate of 3. 4%. These values are significantly higher and lower respectively than recent similar works, which we accredit to the limiting resolution of the R1000 spectroscopy and a stricter outflow selection criterion. We find no correlation between the outflow velocity and the galaxy stellar mass or star-formation rate. The median ratio between outflow velocity and escape velocity is 0. 77 (+0. 36) (-0. 32), indicating that most outflows cannot escape the galaxy gravitational potentials. We do find an anti-correlation between mass loading factor and stellar mass up to M* ~ (10¹0) Msun, with most lowest stellar-mass M*< (10⁹) Msun galaxies reaching values well above unity, as is the case for local starburst galaxies.
Cooper et al. (Tue,) studied this question.