Question on the Argus Array

[stevebowers]

Very early galaxies would be full of large, short-lived stars made of hydrogen and helium - these stars would be less dense than the stars we see today, and would explode as supernovas quite quickly - creating an increasingly metal-rich interstellar medium that condensed into the second generation of stars and later.

Would there be black holes at the centres of galaxies already? I think this is something we will find out in the next few decades - it seems quite possible that some, many or most of the supermassive black holes at the heart of galaxies formed during the Big Bang era, but I may be wrong about that.