Ionized gas kinematics and chemical abundances of low-mass star-forming galaxies at $z\sim 3$

Understand

We selected 35 low-mass SFGs (7.9<log(M$_*$/M$_{\odot}$)<10.3) from deep spectroscopic surveys based on their CIII]1908 emission.

• We used follow-up NIR observations to examine their rest-optical emission lines and identify ionized outflow signatures through broad emission wings detected after Gaussian modeling of [OIII]4959,5007 profiles.
• We characterized the galaxies' gas-phase metallicity and carbon-to-oxygen (C/O) abundance using a Te-based method via the OIII]1666/[OIII]5007 ratio and photoionization models.
• We find line ratios and rest-frame EWs characteristic of high-ionization conditions powered by massive stars.