Gravitational radiation from cosmic strings

Tanmay Vachaspati, Alexander Vilenkin

Research output: Contribution to journalArticle

275 Citations (Scopus)

Abstract

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
Volume31
Issue number12
DOIs
StatePublished - 1985
Externally publishedYes

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gravitational waves
strings
rockets
momentum
friction
radiation
coefficients
energy

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Gravitational radiation from cosmic strings. / Vachaspati, Tanmay; Vilenkin, Alexander.

In: Physical Review D, Vol. 31, No. 12, 1985, p. 3052-3058.

Research output: Contribution to journalArticle

Vachaspati, Tanmay ; Vilenkin, Alexander. / Gravitational radiation from cosmic strings. In: Physical Review D. 1985 ; Vol. 31, No. 12. pp. 3052-3058.
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