In this Flatland space-time, point masses replace infinitely long, parallel cosmic strings
The possible frequency range of the waves is exceptionally large, "raising the hope of detection" of cosmic strings
," said theoretical physicist Henry Tye at Cornell University in Ithaca, New York.
have recently run into trouble in that arena because their expected pattern matches neither the distribution of galactic clusters nor the patchiness of background radiation left over from the Big Bang (SN: 1/27/96, p.
Astronomers are starting to study photographs of stars, searching for distinc- tive gravitational effects caused by cosmic strings.
To settle the argument between inflation and cosmic strings, many physicists await studies of the cosmic background radiation-heat left over from the Big Bang.
18 SCIENCE, was in reasonable agreement with the predicted density of cosmic strings
calculated using Kibble's theory.
He argued that scientists could gain important insights into the behavior of cosmological defects known as cosmic strings
by studying a special kind of vortex defect formed when helium undergoes a phase transition from a normal liquid to a superfluid, which flows without friction.
Different field theories, depending on their complexity, predict different kinds of phase transitions that lead to different kinds of space-time defects: domain walls, cosmic strings
, monopoles, global textures.
Gamma-ray bursters may lie outside our galaxy, and some theorists have suggested exotic explanations for them--for example, that they are vibrating cosmic strings
(SN: 5/30/87, p.
are defects in the structure of the universe,defects in space itself.
, which are topological defects in the structure of space, are the latest things to be suggested as triggers of galaxy formation.