Tiny ‘primordial’ black holes created in the Big Bang may have rapidly grown to supermassive sizes

[Admin]

Supermassive black holes that seem too large to exist in the early universe may have grown from primordial black holes formed in the first second after the Big Bang.

Tiny ‘primordial’ black holes created in the Big Bang may have rapidly grown to supermassive sizes : Read more

 

[Unclear Engineer]

And how would these primordial black holes have affected the CMBR distribution?

Seems like we should be able to see their effect of the CMBR is they were very large very early. And, if they were too small to have an observable effect that early, it seems the we are back into the issue of how they could grow so fast. It seems like they would still ionize gas in accretion disks and slow their own growth if they were in regions of extreme density. Which should also emit light that we should be able to see as at least microwaves if not infrared.

Or, could the BBT just not have the timing right for that early part of the story?

 

[contrarian]

Or, could the BBT just not have the timing right for that early part of the story?

It seems likely that the BBT does not have some things right for the earliest parts of the story.

This topic is certainly a tough nut to crack, but PBHs offer a replacement for one unlikely thing required by the BBT : population III stars.

These are projected to have masses up to or above 1,000 SMs. Most astrophysicists will tell us that stellar masses above ~200 SMs cannot form due to stability issues. The largest star observed in the universe is about 170 SMs.* If they were capable of being much larger, we would surely see them, even today.

PBHs could propel the formation of many massive stars (those which are possible), and which could seed the universe with metals, although there is no firm evidence that metals are even required for star formation. The only thing that is certainly required for star formation is a compact mass of hydrogen and helium at approximately 0.08 SMs.

* https://www.nsf.gov/news/sharpest-image-date-universes-most-massive-known#:~:text=Previous observations suggested that R136a1,the most massive known star.