Timeline for Heavy Element Production from Supernova
Current License: CC BY-SA 3.0
11 events
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| Mar 12, 2016 at 14:24 | history | edited | ProfRob |
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| Jan 27, 2016 at 15:10 | comment | added | Lewis Miller | All the above are very nice comments. Clearly they include information that needs wider dissemination. | |
| Jan 27, 2016 at 0:42 | comment | added | ProfRob | The 1200 Suns refers to the radius by the way, not the mass! | |
| Jan 27, 2016 at 0:41 | answer | added | ProfRob | timeline score: 4 | |
| Jan 27, 2016 at 0:32 | comment | added | ProfRob | @BillOer This is still hugely debated. It has also never been thought (not since the 1950s anyway) that all elements heavier than Fe were produced in supernovae. I cannot understand why this myth persists. | |
| Jan 27, 2016 at 0:27 | comment | added | ProfRob | @LewisMiller Elements heavier than iron can and are made in stars that never reach the supernova stage. This has been known since the 1950s when the short-lived element Technetium was seen in the atmospheres of red giants. Look up s-process and physics.stackexchange.com/q/7131 | |
| Jan 27, 2016 at 0:11 | comment | added | BillDOe | It used to be thought that all the elements heavier than Iron (Fe) were created in supernova explosions. However, the observation of a Gamma Ray Burst (GRB) on 3 June, 2013 has led to the theory, which seems to be widely accepted, that elements heavier than 140 atomic masses are mainly created in neutron star collisions and that supernova contribution is rather minor. I wrote an answer with citations in Astronomy SE. You can read it here: astronomy.stackexchange.com/q/13073 | |
| Jan 26, 2016 at 23:49 | comment | added | Jon Custer | No Uranium isotope is stable. New, as yet undiscovered, elements in the proposed 'island of stability' may be more stable than the last few found, but are also unlikely to be stable. | |
| Jan 26, 2016 at 23:40 | comment | added | Lewis Miller | Because of nuclei binding energetics, all nuclei heavier than Fe must be made in supernova events (shock wave induced). How many would be made in a specific supernova will depend on the distribution of heavy elements in the star prior to the supernova. Obviously Ur would be the heaviest stable element that could be produced. | |
| Jan 26, 2016 at 23:10 | review | First posts | |||
| Jan 27, 2016 at 1:47 | |||||
| Jan 26, 2016 at 23:06 | history | asked | Gil Figaro | CC BY-SA 3.0 |