>within seconds, a star goes from being stable to ejecting all its contents within seconds at near lightspeedhow does this make sense? wouldn't its mass still hold it together? where does the explosion come from?
>>16538074It wouldn't make sense for you, don't worry about it.
>>16538078if you can't explain it well, you don't know it well, goofy.
>>16538074Essentially, all the fusion energy produced in the instant of the inward collapse, 99% of it, gets turned into neutrinos. That flux of particles is then what drives the outward explosion. And if you know anything about neutrinos and how little they interact with matter you get an idea of just how insane a number the supernova must produce.
>>16538082This was said before quantum mechanics was a thing.
>>16538074>within secondsAfter a few billion years of steadily wearing down ideal gas pressure and exhausting fusion fuel.
>>16538074Have you ever bounced a ball?
>>16538082>I am so retarded that it proves everyone else is an idiot.Wow. You need to publish your findings. They are amazing.
>>16538074Whatever you do, OP, do NOT read this:The physics of Core-Collapse Supernovae: explosion mechanism and explosive nucleosynthesis (https://arxiv.org/html/2403.12942v1)
>>16538224neat and all, but who funds this?>fusion reactors, stellar physics are welfare for physicists to prevent them working for enemy nations in the off chance they discover a better nuclear bomb.
>>16538348You are hysterically cute. How far did you make it before you decided to move your goalposts?I'm guessing third sentence in the abstract.
>within seconds, a star goes from being stable to ejecting all its contents within seconds at near lightspeedNot all of it. In most core collapse supernovae the core will remain as some compact remnant, a neutron star or black hole. The other layers are ejected. Only in some rare, very energetic supernovae is no remnant expected.>how does this make sense? wouldn't its mass still hold it together? where does the explosion come from?It's quite obvious in the case you have a neutron star. The whole thing is collapsing until the core hits degeneracy pressure and stops contracting. The outer layers are still collapsing inwards and slam into the stalled core, then they rebound outwards with a shock wave. In the case of a black hole it's believed a proto-neutron star forms first, meaning there is still the rebound and the outward shock. You also have the monumental flux of neutrinos, which carry most of the energy. Although neutrinos interact very weakly there is enough of them to have a significant effect in driving the shock outwards. They are emitted in a fraction of a second and escape immediately. For supernova 1987A 25 neutrinos were detected, even though it is about 170,000 lightyears away.
>>16538396>For supernova 1987A 25 neutrinos were detected, even though it is about 170,000 lightyears away.thats a really really big sphere
>>16538101>all the fusion energy produced in the instant of the inward collapse,this is what i don't understand. i thought at this point, all fusion products were formed with the whole star being layered like this.
>>16538628It's wrong. All of it.Far more likely is the collapse rapidly running through each of those fusion regimes without the time for the effects to propagate and stabilize the star.Also, lol, core.
>>16538630that's what i figured. so the entire remnant fusion activity of the outer hydrogen/helium layer is at a threshold where it can't sustain equilibrium with the gravitational pressure and just does a runaway fusion process while falling inward. i'm still confused then about it being a runaway phenomenon, since i pictured the stability returning once a certain amount of energy, and the resulting forces, produced while collapsing would interfere with the collapse itself, leading to a negative loop instead of a positive one.
>>16538635It reaches a point of endothermic fusion, hence the remnant. The remnant wasn't inside the star, it formed after.Also, the remnant IS the fusion layer.
>>16538637ok so just for closure, it's strictly endothermic at the critical point (no more sub-iron elements), so all the gravitational potential energy contributes to fusion of everything heavier, and there's no release of energy from the fusion such that it's net positive, so all the energy is still just absorbed for further fusion instead of heliosphere disruption. in that case, would it not always lead to a perfectly spherical expansion of the products when they recoil off the leftover neutron star?
