Not a HOT but a COLD string big bang becoming hot by dual black hole based Herbig Haro stars.

It is a pity that the late Weinberg now can not experience any more, that his described hot big bang will become a COLD ONE by the evaporation of the former universal Big Crunch black hole including the vacuum strings.

The dual electric Herbig Haro black holes seem to create the first electric heat and stars in between. see: Quantum FFF Theory, a Conscious String Theory with different Vacuum Trajectories for Axion-Higgs field/ Photons respectively Fermions and Bosons. https://vixra.org/pdf/1801.0121v2.pdf
see also: The Electric Universe by Electric Dark Matter Big Bang Black Holes of Quantum FFF Theory.
https://vixra.org/pdf/1902.0349v1.pdf