Early structure formation from cosmic string loops

Abstract

We examine the effects of cosmic strings on structure formation and on the ionization history of the universe. While Gaussian perturbations from inflation are known to provide the dominant contribution to the large scale structure of the universe, density perturbations due to strings are highly non-Gaussian and can produce nonlinear structures at very early times. This could lead to early star formation and reionization of the universe. We improve on earlier studies of these effects by accounting for high loop velocities and for the filamentary shape of the resulting halos. We find that for string energy scales Gμ> 10^{-7} the effect of strings on the CMB temperature and polarization power spectra can be significant and is likely to be detectable by the Planck satellite. We mention shortcomings of the standard cosmological model of galaxy formation which may be remedied with the addition of cosmic strings, and comment on other possible observational implications of early structure formation by strings.

22 pages, 10 figures. References added

Cited by in corpus (25)

• The number of cosmic string loops
• CMB constraints on cosmic strings and superstrings
• The nanohertz stochastic gravitational wave background from cosmic string loops and the abundant high redshift massive galaxies
• Cosmic String Loops as the Seeds of Super-Massive Black Holes
• Searching for Cosmic Strings in New Observational Windows
• Early Structure Formation from Cosmic String Loops in Light of Early JWST Observations
• Projected constraints on the cosmic (super)string tension with future gravitational wave detection experiments
• Light Deflection by a Quantum Improved Kerr Black Hole Pierced by a Cosmic String
• Light majoron cold dark matter from topological defects and the formation of boson stars
• Massive black holes at high redshifts from superconducting cosmic strings
• Cosmic Strings as Emitters of Extremely High Energy Neutrinos
• Constraints on Superconducting Cosmic Strings from Early Reionization
• Stable $Z$-strings with topological polarization in two Higgs doublet model
• Chaotic inflation in supergravity and cosmic string production
• Correlations between cosmic strings and extra relativistic species
• Cosmic Strings and the Origin of Globular Clusters
• Note on Structure Formation from Cosmic String Wakes
• Effects of Cosmic String Velocities and the Origin of Globular Clusters
• The Flow Around a Cosmic String, Part I: Hydrodynamic Solution
• Investigating cosmic strings using large-volume hydrodynamical simulations in the context of JWST's massive UV-bright galaxies
• High redshift signatures in the 21 cm forest due to cosmic string wakes
• Electroweak strings with dark scalar condensates and their (in)stability
• 21 cm Angular Spectrum of Cosmic String Loops
• Cosmic Strings-induced CMB anisotropies in light of Weighted Morphology
• The Metron Project -- I. The Metron Project Science Program