Are the newly-discovered z 13 drop-out sources starburst galaxies or quasars?

Are the newly-discovered z 13 drop-out sources starburst galaxies or quasars?DOI: info:10.1093/mnrasl/slac035v. 514L6–L10
Pacucci, Fabio, Dayal, Pratika, Harikane, Yuichi, Inoue, Akio K., and Loeb, Abraham. 2022. "Are the newly-discovered z 13 drop-out sources starburst galaxies or quasars?" Monthly Notices of the Royal Astronomical Society, 514 L6–L10. https://doi.org/10.1093/mnrasl/slac035.
ID: 166829
Type: article
Keywords: SAO