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“S04590 at z = 8.496 based on NIRSpec, NIRCam, and NIRISS observations + [C ii]-158μm emission line detected by dedicated Atacama Large Millimeter/submillimeter Array (ALMA) observations”
“low-mass (M*= 10^7.2 −10^8 M ) galaxy with a low oxygen abundance of 12+log (O/H) = 7.16+0.10 −0.12 derived from the strong nebular and auroral emission lines. Assuming that [C ii] effectively traces the interstellar medium (ISM), we estimate the total gas mass of the galaxy to be Mgas = (8.0 ± 4.0) × 10^8 M” = 90% gas fraction.
