Stochastic Gravitational Wave Background from Light Cosmic Strings
Feb, 2007
Citations per year
Abstract: (arXiv)
Spectra of the stochastic gravitational wave backgrounds from cosmic strings are calculated and compared with present and future experimental limits. Background spectra are calculated numerically for dimensionless string tensions G mu/c^2 between 10^{-7} and 10^{-18}, and initial loop sizes as a fraction of the Hubble radius, alpha, from 0.1 to 10^{-6}. The spectra of the cosmic string backgrounds are compared with current millisecond pulsar limits and LISA sensitivity curves. For models with large stable loops (alpha=0.1), current pulsar-timing limits exclude G mu/c^2>10^{-9} and within the range of current models based on brane inflation. LISA may detect a background from strings as light as G mu/c^2 10^{-16}, corresponding to field-theory strings formed at roughly 10^{11} GeV.- 11.27.+d
- 04.30.Db
- 98.80.Cq
- 98.70.Vc
- gravitational radiation
- background: stochastic
- cosmic string: network
- gravitational radiation: spectrum
- string tension
- energy: density
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