The discussion centers on the synthesis of gold in supernovae, specifically exploring the conditions under which gold is formed and the physical state it takes upon ejection. Participants examine the stages of supernovae relevant to gold synthesis and the nature of the ejected material, whether it is in the form of larger chunks or fine dust.
Participants express varying views on the synthesis of gold, with some focusing on neutron star collisions while others discuss core-collapse supernovae. The discussion remains unresolved regarding the specific conditions and forms of gold ejected during these events.
There are limitations regarding the assumptions made about the physical states of gold and the conditions in supernovae, as well as the dependence on definitions of terms like "dust" and "gas." Unresolved mathematical steps related to the synthesis process are also noted.
The two decide to come together, and in the wake of this event their lives are violently destroyed, spraying everybody around with radioactive remains of their marriage, that also happen to include some money - buried in heaps of molten lead and poisonous mercury.Fervent Freyja said:
Bandersnatch said:The two decide to come together, and in the wake of this event their lives are violently destroyed, spraying everybody around with radioactive remains of their marriage, that also happen to include some money - buried in heaps of molten lead and poisonous mercury.
Bandersnatch said:The two decide to come together, and in the wake of this event their lives are violently destroyed, spraying everybody around with radioactive remains of their marriage, that also happen to include some money - buried in heaps of molten lead and poisonous mercury.
Fervent Freyja said:
During a core-collapse supernova what remains of the stellar core collapses to either a neutron star or a black hole, depending on its mass. The subatomic particles that made up the core are crushed together forming neutrons and neutrinos. The neutrinos rush out from the center of the collapsing core and push the in-falling layers of the star back out into space. This neutrino "bounce" produces a shock wave that contains enough energy to produce the heavier elements such as silver, lead, gold, platinum, and uranium. This whole process takes less than 3 seconds. Light is emitted as a result of the expanding shock wave crashing into gas and dust on its way out of the supernova. Gold starts out as a gas, and quickly cools to form dust, which then coalesces into larger objects. If you heat gold beyond its boiling point - 2,856°C (5,173°F) - you can create gold gas.tionis said:
... at one atmosphere pressure; lower pressures mean lower temperatures, and in the "vacuum" of outer space it's possible to have single atoms/ions of gold at CMB temperatures.|Glitch| said: