Neutron Star

Jul 27, 2021
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Neutron stars are among the densest objects in the Universe. They have a radius of 10-20 km but carry a weight up to 2.5 times the mass of the Sun.
A neutron star is the collapsed core of a star. They are formed when the core pressure exceeds the Chandrasekhar limit of about 1.4 solar masses. The electron degeneracy pressure is exceeded which forces protons and electrons to combine to form neutrons.

In its dying phase, when a star with a core containing mainly iron exhausts all its fuel, it collapses under gravity and explodes as a supernova. The extreme high pressure causes protons and electrons to combine into neutrons forming a neutron star. The energy released in the process blows away the outer layers of the star.
Feb 3, 2020
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So, I'd like to explore the transition from a neutron star to a black hole. I wonder how something with a radius of appx. 20 km becomes as big as Sagittarius A, serving as the center of the milky way galaxy? Perhaps this was a large neutron star. It seems a giant leap from neutron star to super massive black hole. I wonder about the process and time required. Any thoughts?
Jul 27, 2021
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That's a good question that intrigues even modern-day astrophysicists. No one really knows how supermassive blackholes are formed. That's still a question. :)
Unresolved, yes.

A difference between them is that a neutron star would be having a hard surface unlike that of a black hole. One of the current findings/opinion is the signature of the lack of a hard-surface. A black whole is considered as a singularity, having a determined horizon, where it's gravity comes to the black whole matter. With such a signature, we can distinguish between a neutron star and a black hole as neutron stars release emissions from the hard-surface.


"Science begets knowledge, opinion ignorance.

Select the above also ^^^^^^^^^^^^


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Cat :)
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Neutron “stars” (they aren’t stars) can produce bursts that are the brightest objects in the galaxy in total energy flux. [ They do need a better name. :)]

Magnetars are neutron “stars”. Their matter transitions constantly between neutrons and protons, plus other particles. This creates huge EM fields.