Yongjung Kim et al 2015 ApJ 813 L35
The recent discovery of a faint quasar at z ~ 6 suggests that the number of quasars at this redshift may not be high enough to fully account for the reionization of the universe by quasars alone.
Yongjung Kim et al 2015 ApJ 813 L35
The recent discovery of a faint quasar at z ~ 6 suggests that the number of quasars at this redshift may not be high enough to fully account for the reionization of the universe by quasars alone.