Abundances of CNO elements in z ~ 0.3-0.4 LyC leaking galaxies

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We present observations with the Space Telescope Imaging Spectrograph (STIS) onboard the Hubble Space Telescope of eleven Lyman continuum (LyC) leaking galaxies at redshifts, z, in the range 0.29-0.43, with oxygen abundances 12+log(O/H)=7.64-8.16, stellar masses Mstar~10^7.8-10^9.8 Msun and O32=[OIII]5007/[OII]3727 of ~5-20, aiming to detect CIII]1908 emission line.

• We combine these observations with the optical Sloan Digital Sky Survey (SDSS) spectra for the determination of carbon, nitrogen and oxygen abundances.
• Our sample was supplemented by thirty one galaxies from the literature, for which carbon, nitrogen and oxygen abundances can be derived from the HST and SDSS spectra.
• These additional galaxies, however, do not have LyC observations.