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.
You obviously want to push it further-to know not just how many vortices or cosmic strings
there were, but also if they are all in loops or long, straight strings.
These experiments showed that a phase transition could generate linelike defects analogous to the cosmic strings
of the Kibble mechanism.
Gott noted that two straight, parallel, infinitely long cosmic strings
hurtling past each other in opposite directions could provide a suitable setting for time travel.
From this abstract mathematical stew, they extract a mess of exotic geometric structures -- cosmic strings
, monopoles, domain walls, global texture -- that rumple the smooth distribution of matter and energy in the universe.
In the past, many of these possibilities -- cosmic strings
, global textures, late-time phase transitions -- would have appeared too strange for anyone to take seriously.
It's a way of keeping speculation about dark matter from falling entirely into the hands of particle physicists, who have proposed an array of strange candidates, from weakly interacting massive particles to cosmic strings
(SN: 3/4/89, p.
Even physicists often need help in teasing out what such equations mean -- what predictions they make about the behavior of electrons, galaxies or cosmic strings