Runaway cosmic strings

Details Runaway cosmic strings Runaway cosmic strings

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987natur.326..853h&link_type=abstract

Nature (ISSN 0028-0836), vol. 326, April 30, 1987, p. 853-855. Research supported by the University of Arizona and NASA.

Astronomy and Astrophysics

Astronomy

6

Astronomical Models, Cosmology, Galactic Evolution, String Theory, Gravitational Effects, Potential Theory

Scientific paper

Two effects of the string model which have been neglected in many treatments but which apparently could alter certain details of our picture of string-induced galaxy formation are examined. First, loops of cosmic string behave like relativistic gyroscopes and undergo only a very slow precession under the influence of Newtonian gravitational torques. They thus impose a 'stiff' time-averaged quadrupolar gravitational potential on matter in their vicinity. Second, the gravitational radiation beamed by an oscillating loop probably has a significant component of dipole asymmetry when averaged over the loop decay time. Recoil reaction on the loop causes a coherent acceleration over time and eventually leads to a high peculiar velocity when loops decay. String loops today would then not generally be found in the centers of galaxies and clusters, but flying freely through intergalactic space.

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