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When is the core collapse phase at the end of the life of a massive star triggered?
Wiki User
∙ 16y ago
The core collapse of a massive star comences as the core has finished fusing the rest of its fuel into iron, the last and heaviest element forged in high-mass stars. At this point the risidual energy put out by the fusing of elements is not worth the energy it takes to fuse them together. Since the fusion process is no longer being carried out, the thermal radiation that is being created by thermonuclear fusion in the core is no longer available and cannot continue to push outward in the opposite direction of the force of gravity, so the impending collapse is triggered then by the ultimate win-out of gravity against the star's internal forces.
Wiki User
∙ 16y ago
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∙ 12y agoless than a second
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Does a supernova implode or explode to form a black hole?
It depends on the mass of the star. When massive stars die the result is usually an enormous explosion called a supernova, but the core will collapse to form a dense remnant. If the remnant is less than 3 times the mass of the sun then it will form a neutron star. If it is greater than 3 times the mass of the sun it will form a black hole. Extremely massive stars may collapse directly into a black hole with no supernova.
How is a stellar mass black hole formed?
A stellar black hole forms when a massive star exhausts the fuel in its core. The core then collapses. If it has enough mass nothing will be able to stop the collapse and the core will form a black hole. The outer layers of the star will, in most cases, be blaster away in a supernova explosion.
What is happening to the star of a protostar?
A protostar is a star that is just beginning to form out of a stellar nebular (under gravity). The core of the gravitational collapse is getting more and more massive and is heating up as a result of the gravimetric contraction but has not yet reached the point where nucleosynthesis has begun in its core. It is when this happens that it becomes a star.
Why does the core collapse once fusion stops?
The energy released by fusion in the core of a star produces an outward pressured force that counteracts gravity. When fusion stops, that force goes away and gravity takes hold, causing the core to collapse.
What causes neutrons stars to form?
when a supernova occurs and the star is destroyed but if some how the nucleus survives and its mass is 1.4 solar masses then the nucleus started to shrink under its own gravity then the next stable state is neutron star.
Why can only very massive stars form a black hole?
When a star dies the core collapses, but in most cases collapse stops at the level of either a white dwarf or a neutron star. The internal pressure of the remnant core is enough to stop further collapse. Only the most massive stars have strong enough gravity to overcome these forces and collapse into black holes.
What happens when a massive star cools and collapses?
Massive stars do not cool as they collapse, the collapse in on themselves because their cores become too heavy and dense, these atoms in the core are in an area so dense and so hot that it continues to increase its temperature as it explodes.
What happens to a massive star when its fusion period is over?
Once a star's nuclear fusion has ended, it will collapse inside its core and become what is known as a white dwarf. Its outer layers will shoot out into the universe as planet nebula. If they are very large, stars will explode into a Supernova and their core will collapse into a black hole.
When a protostar dies it turns into what?
A Protostar doesn't really die. It is the early stage of star formation. If there is not enough mass you end up with a brown dwarf. If the mass is sufficient the next step is called a T Tauri star. The next phase would be a main-sequence star. Then depending on it's mass It will become a white dwarf or a red giant. If the red giant is massive enough the core collapse even more until the outer layers explode off, called a supernova. If the star was massive enough the core that is left behind will collapse into a neutron star or a black hole.
What makes a high mass star's core collapse?
the high mass star's core collapse because its gravity
What makes a high-mass stars core collapse?
the high mass star's core collapse because its gravity
What does increased temperature from contraction in the core cause the helium core to do?
This phenomenon happen during the red phase collapse of smaller stars. The contraction in the core of the star causes the helium to go into a runaway fusion reaction that releases an immense amount of energy for a brief time.
What does the increased temperature from contraction in the core cause the helium core to do?
This phenomenon happen during the red phase collapse of smaller stars. The contraction in the core of the star causes the helium to go into a runaway fusion reaction that releases an immense amount of energy for a brief time.
Does a supernova implode or explode to form a black hole?
It depends on the mass of the star. When massive stars die the result is usually an enormous explosion called a supernova, but the core will collapse to form a dense remnant. If the remnant is less than 3 times the mass of the sun then it will form a neutron star. If it is greater than 3 times the mass of the sun it will form a black hole. Extremely massive stars may collapse directly into a black hole with no supernova.
What is the core of the star left after a sopernova exsplosion called?
Several types of supernovae exist. Types I and II can be triggered in one of two ways, either turning off or suddenly turning on the production of energy through nuclear fusion. After the core of an aging massive star ceases generating energy from nuclear fusion, it may undergo sudden gravitational collapse into a neutron star or black hole, releasing gravitational potential energy that heats and expels the star's outer layers.
What is the onion of a star?
If I understand the question correctly, you are referring to the layers of a massive star as it nears the end of it's life. When a massive star nears the end of it's life, it runs out of hydrogen, the outward pressure that has kept it stable for most of it's life, is no longer there, this causes a collapse. This collapse, causes the core to heat up and helium is then fused. This process repeats several times; each time the core collapses, and the collapse is halted by the ignition of a further process involving more massive nuclei and higher temperatures and pressures. This creates the onion effect, a distinct layer of different fusing, with the lighter - or easier fused" elements towards the edge. See related link for a pictorial.
When the core in a giant star collapse it create what?
supernova
