Seeding high-redshift QSOs by collisional runaway in primordial star clusters
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Abstract
We study how runaway stellar collisions in high-redshift, metal-poor star
clusters form very massive stars (VMSs) that can directly collapse to
intermediate-mass black holes (IMBHs). We follow the evolution of a pair of
neighbouring high-redshift mini-haloes with high-resolution, cosmological
hydrodynamical zoom-in simulations using the adaptive mesh refinement code
RAMSES combined with the non-equilibrium chemistry package KROME. The first
collapsing mini-halo is assumed to enrich the central nuclear star cluster
(NSC) of the other to a critical metallicity, sufficient for Population II
(Pop. II) star formation at redshift
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1365-2966
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Science and Technology Facilities Council (ST/L000725/1)
Science and Technology Facilities Council (ST/M007073/1)
STFC (ST/M007073/1)