naked singularity


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naked singularity

See singularity.

naked singularity

[′nā·kəd ‚siŋ·gyə′lar·əd·ē]
(relativity)
A singularity that is not surrounded by an event horizon, and thus gives rise to timelike curves that violate causality.
References in periodicals archive ?
Now, imagine a singularity that has a given amount of mass in a nearly infinitely small space, but at the same time does not have an event horizon, then that object would be called a naked singularity. This is, of course, a theoretical object, but it does pop out from the extremely advanced math that physicists indulge in.
All that we could possibly learn from observing a naked singularity is what happens to an object when it is swallowed by a singularity, instead of losing sight of it at the event horizon.
Singularities are thought to exist at the center of black holes, and naked singularity is the name given to singularities that exist outside black holes.
But a new theory proposed earlier this month by two Cambridge researchers is the first time a naked singularity has been predicted in four dimensions.
A Naked Singularity, however, is crime fiction mixed with speculative ethicism and Eliot-level poetic realness, and when it gets weird it's weird, not "experimental." (No spoilers, but for me the crux is when New York's electricity goes out, and the grid loses its grip to slippery, forking paths.) I read it when it felt like every Brooklyn writer I knew was talking about the same new Brooklyn novels, written by Brooklyn writers about the struggles of being writers in Brooklyn, and I wanted to plant bombs in Park Slope.
Another difficulty is given by the fact that the observer on [[Gamma].sub.2] may fail to discriminate messages from [[Gamma].sub.1], given the possibility that the naked singularity (resulting from a violation of the censorship hypothesis) can send, among other things, a false signal to the receiver.
According to Clarke and Krolak [32], a sufficient condition for the naked singularity to be strong in the sense of Tipler et al.
On the other hand, a naked singularity, if such a thing exists, would be an abrupt hole in the fabric of reality - one that would not just distort space-time, but would also wreak havoc on the laws of physics wherever it goes and lead to a catastrophic loss of predictability.
A Naked Singularity's narrator is Casi, a twenty-four-year-old public defender in Manhattan, who gives us tour-de-force dialogues between himself and his clients and colleagues, torturous philosophizing with his college-age neighbors, a gripping biography of half-forgotten boxer Wilfred Benitez, depictions of a citywide blackout during the coldest winter in memory, day-by-day accounts of the public's gleeful fascination with a horrific child-abduction case, an inside look at pro bono work on a death-row case involving a mentally challenged inmate, and the proverbial "much more." Casi's voice is the combination of brashness and world-weary humanity you'd find on a cynic who'd been scratched to reveal the disappointed idealist beneath.
On the contrary, there is no mathematical reason that a naked singularity cannot exist in a solution of the field equations.
In case the metric is static and diagonal, there are reasons to consider the collision process in the vicinity of a naked singularity as well.
Witten, "A simple derivation of the naked singularity in spherical dust collapse," Classical and Quantum Gravity, vol.