Quasi-star

[2] Quasi-stars may have also formed from dark matter halos drawing in enormous amounts of gas via gravity, which can produce supermassive stars with tens of thousands of solar masses.

[3][4] Formation of quasi-stars could only happen early in the development of the Universe before hydrogen and helium were contaminated by heavier elements; thus, they may have been very massive Population III stars.

Once the black hole had formed at the protostar's core, it would continue generating a large amount of radiant energy from the infall of stellar material.

This constant outburst of energy would counteract the force of gravity, creating an equilibrium similar to the one that supports modern fusion-based stars.

[6] Quasi-stars would have had a short maximum lifespan, approximately 7 million years,[7] during which the core black hole would have grown to about 1,000–10,000 solar masses (2×1033–2×1034 kg).