Cosmological constraints on cosmic-string gravitational radiation

Details Cosmological constraints on cosmic-string gravitational radiation Cosmological constraints on cosmic-string gravitational radiation

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992phrvd..45.3447c&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 45, Issue 10, 15 May 1992, pp.3447-3468

Statistics

Computation

95

Background Radiations

Scientific paper

The primordial nucleosynthesis and pulsar timing noise constraints on cosmic-string gravitational radiation are computed. The computation consists of a numerical integration of the Friedmann-Robertson-Walker Einstein equations which describe a universe containing radiation, dust, and a ``one-scale''-model cosmic-string component. The procedure takes into account the effects of the annihilations of massive particle species on the equation of state of the cosmological fluid. An expression for the power emitted per mode of oscillation by a cosmic-string loop, suggested by both analytic calculations and recent numerical simulations, is used. The results of the computation are spectra of the cosmic-string gravitational radiation at nucleosynthesis and at present. Comparison of these spectra with the observed bounds on pulsar timing noise, and the observed bound on the effective number of light neutrino species permitted by the model of nucleosynthesis, allows one to exclude a range of values of μ, the cosmic-string linear mass density, for certain values of α, the size of a newly formed loop as a fraction of the particle horizon radius. We find constraints to μ which are more restrictive than any previous limit.

Affiliated with

Also associated with

No associations

Rating

Cosmological constraints on cosmic-string gravitational radiation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Cosmological constraints on cosmic-string gravitational radiation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmological constraints on cosmic-string gravitational radiation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1519831