Timeline for Is there evidence of gas ever forming a black hole without being a star first?
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
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| Aug 6, 2018 at 19:32 | vote | accept | Inertial Ignorance | ||
| Jul 19, 2018 at 20:23 | comment | added | safesphere | Just trying to understand. The Jeans mechanism involves a spontaneous symmetry breakdown of the primordial cloud into collapsing regions. This seems valid since the cloud has indeed collapsed into stars. However, this breakdown comes with a non-zero probability of a larger region collapsing without fragmentation. This may well be the cause for the formation of supermassive black holes, around which then galaxies formed. After all, is it not the main purpose of the inflation to create non-uniformities in the cloud, without which it would not collapse into stars? What is the flaw in my argument? | |
| Jul 19, 2018 at 19:49 | comment | added | ProfRob | @safesphere I suppose because the Jeans mass is 100 times smaller than that. So any such collapsing cloud would fragment. | |
| Jul 19, 2018 at 6:05 | comment | added | safesphere | So the UV can produce a $10^4-10^5 sm$ black hole. What about a bigger one? What is wrong with an obvious idea that a large enough cloud of hydrogen can be within its Schwarzchild radius even without collapsing (as long as it is not expanding with the universe)? Granted this is too crazy, but along this line, couldn't a $10^7 sm$ cloud form a BH by collapsing without getting hot enough to stop the collapse? If the BB was so uniform, why would this not be feasible? | |
| Jul 18, 2018 at 22:36 | history | edited | ProfRob | CC BY-SA 4.0 |
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| Jul 18, 2018 at 22:31 | history | answered | ProfRob | CC BY-SA 4.0 |