Trapping of H <scp>ii</scp> regions in Population III star formation

ABSTRACT Radiative feedback from massive Population III (Pop III) stars in the form of ionizing and photodissociating photons is widely believed to play a central role shutting off accretion on these stars. Understanding whether how this occurs vital for predicting final masses reached by Pop stellar initial mass function. To help us better understand impact UV radiation gas surrounding them, we carry out high-resolution simulations formation early evolution stars, using arepo moving-mesh code coupled with innovative radiative transfer module sprai. Contrary most previous results, find that trapped dense disc them. Consequently, inclusion has no significant either number or total protostars formed during 20 kyr period simulate. We show reason obtain qualitatively different results studies lies injected into simulation. H ii region trapping only if are scales smaller than local scale height disc, criterion not fulfilled 3D process. Finally, speculate as outflows driven magnetic field Lyman-? pressure may be able clear enough away star allow escape disc.