Nebular dominated galaxies: insights into the stellar initial mass function at high redshift

We identify a low-metallicity (12+\log({\rm O}/{\rm H})=7.59) Ly\alpha-emitting galaxy at z=5.943 with evidence of a strong Balmer jump, arising from nebular continuum. While Balmer jumps are sometimes observed in low-redshift star-forming galaxies, this galaxy also exhibits a steep turnover in the UV continuum. Such turnovers are typically attributed to absorption... Show more