collapsar

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collapsar

(kɒˈlæpsɑː)
n
(Astronomy) astronomy a collapsed star, either a white dwarf, neutron star, or black hole
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This classification of stars results in three main types: regular stars (covering white dwarfs to super-giants) covered in Chapter 2, of which Wolf-Rayet stars are a subtype, neutron stars and pulsars, covered in Chapter 4 and collapsars (i.
They derive the conditions for pulsars and neutron stars to become collapsars.
Because the Schwarzschild metrics lead to consideration of the state of gravitational collapse, we may suppose that not only regular gravitational collapsars can be considered (the surface of a regular black hole possesses metric properties), but even a much more exotic sort of collapsed objects--a collapsar whose surface cannot be presented with metric geometries.