Rybak, MatusMatusRybakDa Cunha, E.E.Da CunhaGroves, B.B.GrovesHodge, J. A.J. A.HodgeAravena, M.M.AravenaMaseda, M.M.MasedaBoogaard, L.L.BoogaardBerg, D.D.BergCharlot, S.S.CharlotDECARLI, ROBERTOROBERTODECARLIErb, D. K.D. K.ErbNelson, E.E.NelsonPacifici, C.C.PacificiSchmidt, K. B.K. B.SchmidtWalter, F.F.WalterVan Der Wel, A.A.Van Der Wel2022-05-272022-05-2720210004-637Xhttp://hdl.handle.net/20.500.12386/32103Extreme emission-line galaxies (EELGs) at redshift z = 1-2 provide a unique view of metal-poor, starburst sources that are the likely drivers of the cosmic reionization at z ≥ 6. However, the molecular gas reservoirs of EELGs - the fuel for their intense star formation - remain beyond the reach of current facilities. We present ALMA [C ii] and PdBI CO(2-1) observations of the z = 1.8, strongly lensed EELG SL2S 0217, a bright Lyα emitter with a metallicity 0.05 Z o˙. We obtain a tentative (∼3σ-4σ) detection of the [C ii] line and set an upper limit on the [C ii]/SFR (star-forming rate) ratio of ≤1 106 L o˙/(M o˙ yr-1), based on the synthesized images and visibility-plane analysis. The CO(2-1) emission is not detected. Photoionization modeling indicates that up to 80% of the [C ii] emission originates from neutral or molecular gas, although we cannot rule out that the gas is fully ionized. The very faint [C ii] emission is in line with both nearby metal-poor dwarfs and high-redshift Lyα emitters, and predictions from hydrodynamical simulations. However, the [C ii] line is 30 fainter than predicted by the De Looze et al. [C ii]-SFR relation for local dwarfs, illustrating the danger of extrapolating locally calibrated relations to high-redshift, metal-poor galaxies.STAMPAenArticle10.3847/1538-4357/abd9462-s2.0-85103300490https://api.elsevier.com/content/abstract/scopus_id/85103300490https://iopscience.iop.org/article/10.3847/1538-4357/abd946FIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation