collapsar


Also found in: Dictionary, Wikipedia.

collapsar

[kə′lap‚sär]
(astronomy)
A black hole that forms during the gravitational collapse of a massive star.
References in periodicals archive ?
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.
Two papers scheduled for an upcoming Astrophysical Journal Letters appear to support the collapsar model.
Theorist Stun Woosley of the University of California, Santa Cruz, who helped develop the collapsar model, says that regardless of which model ultimately wins out, "the preponderance of evidence now shows that gamma-ray bursts accompany and are a direct consequence of the deaths of massive stars" and thus the birth of black holes.
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.
In a model developed by Stan Woosley of the University of California, Santa Cruz and his colleagues, this failed supernova, or collapsar, produces a gamma-ray burst that lasts about 20 seconds.