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Results tagged with neutron-stars
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user 310328
A neutron star is the final stage of the graviational collapse of a massive supergiant star. Except for black holes, neutron stars are the smallest and densest currently known class of stellar objects
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Does tidal deformation change the volume as well as the shape of a neutron star?
It’s said that according to general relativity, perfect vacuum is Ricci flat, which means variation of the gravitational field only deforms an object without compression or expansion. However, neutron …
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What’s the maximum amount of angular momentum a neutron star can carry?
For Kerr black holes, the spinning rates can be described by a normalized spin parameter $a=cJ/GM^2$, which takes any values between 0 and 1 regardless of the masses of the black holes. If we use the …
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Is it possible to calculate the upper bound of neutron star mass under idealized conditions?
The precise upper bound of neutron star mass is unknown because the equation of state (EOS) of nuclear matter is still poorly understood. However, there are still theoretical constraints on the stiffn …
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Are there any subtle differences in the gravitational waves emitted from NSNS, NSBH and BHBH...
LIGO has detected several NSNS and NSBH merger events. However, it’s difficult to tell their identities directly unless the neutron stars are very light in an NSNS merger (such as GW170817) or the bla …
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Does the gravitational redshift obey the Stefan-Boltzmann law?
Here is a non rotating neutron star emitting perfect black body radiation from its surface. Supposing that the radiation is redshifted by a factor of 2 for distant observers (which is chosen purely fo …
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How do we know the chemical composition of the crust of neutron stars?
Although neutron stars are mostly made of neutronium, the pressure at the surface is not very high which allows regular atomic matters to exist. Emission spectrum can reveal the chemical composition o …
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Is the existence of hydrostatic relativistic objects a coincidence or inevitable?
Neutron stars are unique in the universe because their sizes are just slightly bigger than their Schwarzschild radii. Because their sizes are comparable with their Schwarzschild radii, the nonlinear e …
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