Gravitational radiation from cosmic strings

Tanmay Vachaspati, Alexander Vilenkin

Research output: Contribution to journalArticlepeer-review

364 Scopus citations


Gravitational radiation from oscillating loops of string is studied both analytically and numerically. The total radiated power is found to be P=G1/4, where 1/4 is the mass density of the string and is a numerical coefficient 1/4100. The intensity and the spectrum of the stochastic gravitational-wave background produced by the loops are calculated. Gravitational radiation from asymmetric loops carries not only energy, but also momentum; the loop recoils and accelerates like a rocket. The momentum radiation rate from loops is calculated and it is shown that cosmological loops formed with sufficiently small initial velocities are slowed down by dynamical friction and do not rocket away.

Original languageEnglish (US)
Pages (from-to)3052-3058
Number of pages7
JournalPhysical Review D
Issue number12
StatePublished - Jan 1 1985
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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