Pulsar timing limits on very low frequency stochastic gravitational radiation

Details Pulsar timing limits on very low frequency stochastic gravitational radiation Pulsar timing limits on very low frequency stochastic gravitational radiation

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996phrvd..53.3468t&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 53, Issue 6, 15 March 1996, pp.3468-3471

Mathematics

Logic

80

Pulsars, Gravitational Wave Detectors And Experiments, Observational Cosmology

Scientific paper

A low-frequency, stochastic gravitational radiation background can be detected through the irregularities it induces in pulsar arrival times. Here, we present an optimal statistical framework for analysis of timing data from a single pulsar, correcting an error in previous treatments. Observations of PSR B1855+09 yield an upper limit (95% confidence) of 1.0×10-8 or (90% confidence) 4.8×10-9 of the closure density at frequency 4.4×10-9 Hz. This result probably rules out cosmological models that use cosmic strings as seeds for galaxy formation. Combined observations of four binary pulsars yield weaker limits at frequencies as low as 10-12 Hz.

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