Black strings: Black holes with extra dimensions
"While the idea of extra dimensions may sound wacky, physical theories suggest it's a distinct possibility.
Five-dimensional black strings evolve into black holes connected by black string filaments, in this computer simulation.By Clara Moskowitz
updated 9/23/2010 10:25:30 AM ET
Share Print Font: +-Meet the Bizarro universe version of a black hole: a black string.
These hypothetical objects might form if our universe has hidden extra dimensions beyond the three of space and one of time that we can see, scientists say. A new study of five-dimensional black strings offers a glimpse into how these strange objects might evolve over time — if indeed they exist at all.
While it's difficult to visualize a five-dimensional object in our three-dimensional space, black strings would be cylindrical, researchers said. Think of a three-dimensional spherical black hole that's copied and stacked out in one direction to create an oblong shape.
"One of the problems that comes with thinking about higher dimensions is it's hard to even picture these things," said researcher Luis Lehner of the Perimeter Institute for Theoretical Physics, the University of Guelph and the Canadian Institute for Advanced Research, all in Canada.
Like black holes, black strings would be created when matter is squished so dense that the curvature of space-time becomes so large that even light cannot escape.
Lehner and colleague Frans Pretorius of Princeton University in New Jersey used a computer simulation to study how black strings would behave. Their results are detailed in a recent issue of the journal Physical Review Letters.
Holes and strings
The simulations reveal that a black string probably wouldn't be stable for long. Any small perturbation or deformation of its shape would set off a cascading pattern."
http://www.msnbc.msn.com/id/39324271/ns ... nce-space/
Physical Review Letter-By Lehner & Pretorius