Synergies between JWST and ALMA are unveiling a population of bright, super-early galaxies (z>10), including systems like GS-z14-0 (z=14. 2) and GHZ2 (z=12. 3) with extreme far-infrared (FIR) line ratios (̊m OIII 88μ m/ CII 158μ m > 3) that challenge galaxy formation models. To address this, we identified a synthetic analog of these sources Amaryllis within the SERRA zoom-in simulations and tracked its evolution from z=16 to z=7. During this period, Amaryllis grows from łog (M_⋆/M_⊙) ∼ 7. 4 to 10. 3, linking super-early progenitors to the massive galaxy population at the end of reionization. At z ∼ 11. 5, Amaryllis closely matches the observed properties of GS-z14-0, including the M_⋆, star formation rate, and the luminosity of FIR (OIII 88μm) and UV (e. g. , CIII
Kohandel et al. (Mon,) studied this question.