Neutron star is the collapsed core of a massive supergiant star, which had a total mass of between 10 and 25 solar masses, possibly more if the star was especially metal-rich.
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10 Facts About Neutron star
2.
Neutron star material is remarkably dense: a normal-sized matchbox containing neutron-star material would have a weight of approximately 3 billion tonnes, the same weight as a 0.
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3.
The infalling outer envelope of the star is halted and flung outwards by a flux of neutrinos produced in the creation of the neutrons, becoming a supernova.
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4.
But, because it has only a tiny fraction of its parent's radius, a neutron star is formed with very high rotation speed, and then over a very long period it slows.
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5.
The upper limit of mass for a neutron star is called the Tolman–Oppenheimer–Volkoff limit and is generally held to be around 2.
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6.
Neutron star has some of the properties of an atomic nucleus, including density and being composed of nucleons.
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7.
Likewise, a collapsing star begins with a much larger surface area than the resulting neutron star, and conservation of magnetic flux would result in a far stronger magnetic field.
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8.
However, with a neutron star the increased effects of general relativity can no longer be ignored.
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9.
Current models indicate that matter at the surface of a neutron star is composed of ordinary atomic nuclei crushed into a solid lattice with a sea of electrons flowing through the gaps between them.
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10.
Sometimes a neutron star will undergo a glitch, a sudden small increase of its rotational speed or spin up.
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