collapsar

The term collapsar is sometimes used as a general term for a collapsed star (the stellar remnant, a stellar-mass black hole, possibly also used for a neutron star or less likely, a white dwarf). This is presumably what the term was coined for, but in general, the terms "stellar-mass black hole", "stellar remnant" and compact object are currently more likely to be used; the current common usage of collapsar is specifically in relation to a hypernova, one model of which is termed the collapsar model; the hypernova itself or its result (which is a stellar-mass black hole) is often called a collapsar. The model attributes some long gamma-ray bursts to such hypernovae.