Forecast constraints on cosmic strings from future CMB, pulsar timing and gravitational wave direct detection experiments

Abstract

We study future observational constraints on cosmic string parameters from various types of next-generation experiments: direct detection of gravitational waves (GWs), pulsar timing array, and the cosmic microwave background (CMB). We consider both GW burst and stochastic GW background searches by ground- and space-based interferometers as well as GW background detection in pulsar timing experiments. We also consider cosmic string contributions to the CMB temperature and polarization anisotropies. These different types of observations offer independent probes of cosmic strings and may enable us to investigate cosmic string properties if the signature is detected. In this paper, we evaluate the power of future experiments to constrain cosmic string parameters, such as the string tension Gmu, the initial loop size alpha, and the reconnection probability p, by performing Fisher information matrix calculations. We find that combining the information from the different types of observations breaks parameter degeneracies and provides more stringent constraints on the parameters. We also find future space-borne interferometers independently provide a highly precise determination of the parameters.

33 pages, 11 figures

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Cited by in corpus (31)

• Cosmology with the Laser Interferometer Space Antenna
• The number of cosmic string loops
• Stochastic gravitational wave background from smoothed cosmic string loops
• Constraints on cosmic strings using data from the first Advanced LIGO observing run
• Probing the pre-BBN universe with gravitational waves from cosmic strings
• Characterising gravitational wave stochastic background anisotropy with Pulsar Timing Arrays
• Beyond the Standard Models with Cosmic Strings
• Time-domain Implementation of the Optimal Cross-Correlation Statistic for Stochastic Gravitational-Wave Background Searches in Pulsar Timing Data
• BSM with Cosmic Strings: Heavy, up to EeV mass, Unstable Particles
• Detecting Relic Gravitational Waves by Pulsar Timing Arrays: Effects of Cosmic Phase Transitions and Relativistic Free-Streaming Gases
• Probing circular polarization in stochastic gravitational wave background with pulsar timing arrays
• Hybrid Inflation in the Complex Plane
• Probing Cosmic Superstrings with Gravitational Waves
• The effect of small inter-pulsar distance variations in stochastic gravitational wave background searches with Pulsar Timing Arrays
• Inflation, String Theory and Cosmology
• Pulsar-timing measurement of the circular polarization of the stochastic gravitational-wave background
• Searching for gravitational wave bursts from cosmic string cusps with the Parkes Pulsar Timing Array
• Anisotropies in the gravitational wave background as a probe of the cosmic string network
• Type-I cosmic string network
• Multi-Scale Pipeline for the Search of String-Induced CMB Anisotropies
• Cosmic string gravitational waves from global $U(1{)}_{B-L}$ symmetry breaking as a probe of the type I seesaw scale
• Peak-peak correlations in the cosmic background radiation from cosmic strings
• Chaotic inflation in supergravity and cosmic string production
• Detection of Low Tension Cosmic Superstrings
• Improved calculation of the gravitational wave spectrum from kinks on infinite cosmic strings
• Instability of Higgs Vacuum via String Cloud
• Probing Cosmic Strings with Gravitational-Wave Fringe
• Future targets for light gauge bosons from cosmic strings
• Gravitational wave spectrum from kinks on infinite cosmic superstrings with Y-junctions
• Cosmic Strings-induced CMB anisotropies in light of Weighted Morphology
• Detecting stochastic gravitational wave background from cosmic strings with next-generation detector networks: Component separation based on a multi-source astrophysical foreground noise model