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Acollapsar (aportmanteau word formed by "collapsed" + "star") is astar which has undergonegravitational collapse.[1] When a star no longer has enough fuel for significant fusion reactions, there are three possible outcomes, depending on the remnant star's mass: If it is less than theChandrasekhar limit (1.4 solar masses), the star will stabilize and shrink, becoming awhite dwarf; between the Chandrasekhar limit and theTolman–Oppenheimer–Volkoff limit (approximately 2.9 M☉), it will become aneutron star; and above the Tolman–Oppenheimer–Volkoff limit, the star will become ablack hole. However, it is theorized that the high density of neutron star cores allow forquark matter and, as a result, a star that is more massive than even the Tolman–Oppenheimer–Volkoff limit, yet still is not a black hole.[2]
| Stars |  | |
|---|---|---|
| Stellar processes | ||
| Collapse | ||
| Supernovae | ||
| Compact and exotic objects | ||
| Particles, forces, and interactions | ||
| Quantum theory | ||
| Degenerate matter | ||
| Related topics | ||
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