Neutron stars seem an oddity to me

In summary: This is known as neutron degeneracy pressure. In summary, neutron stars are formed through stellar collapse and are held together by a combination of gravity and neutron degeneracy pressure. This prevents them from becoming black holes.
  • #1
wolram
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neutron stars seem an oddity to me, they seem to have
to much mass to size to be held together purly by gravity
do neutrons have mutual attraction? or is space very very
distorted by them?
 
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  • #2
They ARE held togethr by garvity, you can never have enough mass to volume to be held together by gravity.
 
  • #3
They ARE held togethr by garvity, you can never have enough mass to volume to be held together by gravity.
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so how does a neutron star become a neutron star, it seems that
size for size the neutron star should distort space time in the most
extreem way, probabaly more tightly than a black hole.
 
  • #4
wolram said:
They ARE held togethr by garvity, you can never have enough mass to volume to be held together by gravity.
----------------------------------------------------------------------------------
so how does a neutron star become a neutron star, it seems that
size for size the neutron star should distort space time in the most
extreem way, probabaly more tightly than a black hole.

A neutron star becomes a neutron star via stellar collapse when the stellar remnants have enough gravity to overcome the degenarcy pressure between electrons and protons after the star goes supernova. What stops it becoming a black hole is that it doesn't have enough gravity to overcome the degenracy pressure between neutrons.
 
  • #6
I had a look on google as i wasn't sure about the explanations
given, and found this,

http://xxx.arxiv.cornell.edu/abs/astro-ph/0311471

Neutron stars without gravity
Authors: V.K.Ignatovich

It is demonstrated that not only gravity, but also neutron-striction forces due to optical potential created by coherent elastic neutron-neutron scattering can hold a neutron star together. The latter forces can be stronger than gravitational ones. The effect of these forces on mass, radius and composition of the neutron star is estimated.

this maybe speculative but it does show that gravity may not be the
only contributer to the binding force of a neutron star.
 
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  • #7
jcsd said:
What stops it becoming a black hole is that it doesn't have enough gravity to overcome the degenracy pressure between neutrons.
+ there's is often rotation..
 
  • #8
jcsd said:
A neutron star becomes a neutron star via stellar collapse when the stellar remnants have enough gravity to overcome the degenarcy pressure between electrons and protons after the star goes supernova. What stops it becoming a black hole is that it doesn't have enough gravity to overcome the degenracy pressure between neutrons.
At this level, it would be degeneracy pressure of the strong nuclear force; binding force between the quarks that make up the neutrons.
 

1. What exactly is a neutron star?

A neutron star is a celestial object that is formed when a massive star dies in a supernova explosion. It is incredibly dense, with a mass greater than that of our Sun packed into a sphere about the size of a city. The intense gravity of a neutron star causes the protons and electrons in its core to combine and form neutrons.

2. How are neutron stars different from other types of stars?

Unlike most other stars, which are made mostly of gas, neutron stars are made almost entirely of neutrons. They also have much stronger magnetic fields and rotate very rapidly, often spinning hundreds of times per second.

3. What makes neutron stars so odd?

Neutron stars are considered odd because of their extreme properties. They are incredibly dense, have extremely strong magnetic fields, and rotate rapidly. They also emit strong radiation in the form of X-rays and gamma rays.

4. Can we observe neutron stars from Earth?

Yes, we can observe neutron stars from Earth using telescopes and other instruments. However, because they are relatively small and far away, they can be difficult to detect. Astronomers use techniques such as pulsar timing and X-ray observations to study neutron stars.

5. Are there any potential risks associated with neutron stars?

Since neutron stars have such strong magnetic fields and emit high levels of radiation, they can be dangerous for spacecraft and astronauts that come too close. However, the nearest known neutron star is over 300 light years away, so they pose no immediate threat to Earth.

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