Cosmology & Gravity Working Group — Sultan Hassan (University of Western Cape, Cape Town, SA)
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Europe/Stockholm
C6:1046 (aka FC61)
C6:1046 (aka FC61)
Description
What reionized our Universe?
The nature of sources driving cosmic Hydrogen reionization remains uncertain. It is widely believed that star-forming galaxies have provided
the bulk of ionising photon budget required to complete reionization. Recent developments have triggered a debate about the ability
of active galactic nuclei (AGN) to reionize the universe. Using a large scale semi-numerical model of reionization, I will compare
Galaxy-dominated versus AGN-dominated models in terms of several reionization key observables. Finally, I will provide an example
of how future 21cm observations by LOFAR, HERA, and SKA can potentially constrain and discriminate between these models
to complementing current reionization observations.
