CMB and density fluctuations from strings plus inflation

Abstract

In cosmological models where local cosmic strings are formed at the end of a period of inflation, the perturbations are seeded both by the defects and by the quantum fluctuations. In a subset of these models, for example those based on $D$-term inflation, the amplitudes are similar. Using our recent calculations of structure formation with cosmic strings, we point out that in a flat cosmology with zero cosmological constant and 5% baryonic component, strings plus inflation fits the observational data much better than each component individually. The large-angle CMB spectrum is mildly tilted, for Harrison-Zeldovich inflationary fluctuations. It then rises to a thick Doppler bump, covering $\ell =200-600$, modulated by soft secondary undulations. The standard CDM anti-biasing problem is cured, giving place to a slightly biased scenario of galaxy formation.

References in corpus (6)

• The High-Z Supernova Search: Measuring Cosmic Deceleration and Global Cur vature of the Universe Using Type Ia Supernovae
• Cosmic strings from preheating
• The power spectra of CMB and density fluctuations seeded by local cosmic strings
• Structure formation by cosmic strings with a cosmological constant
• Cosmic-String-Seeded Structure Formation
• Isocurvature Fluctuations of the M-theory Axion in a Hybrid Inflation Model

Cited by in corpus (61)

• Cosmic String Production Towards the End of Brane Inflation
• Observational Constraints on Cosmic String Production During Brane Inflation
• Cosmic Structure Formation with Topological Defects
• CMB power spectrum contribution from cosmic strings using field-evolution simulations of the Abelian Higgs model
• Bounds on Cosmic Strings from WMAP and SDSS
• Constraints on Supersymmetric Models of Hybrid Inflation
• Current cosmological constraints from a 10 parameter CMB analysis
• Evidence against or for topological defects in the BOOMERanG data ?
• Phase Correlations in Cosmic Microwave Background Temperature Maps
• Delayed Recombination
• D-term inflation without cosmic strings
• B-modes from Cosmic Strings
• Constraining Primordial Non-Gaussianity With the Abundance of High Redshift Clusters
• Inflation and Supersymmetry Breaking
• Evolution of the cluster abundance in non-Gaussian models
• On the evolution of cosmic-superstring networks
• Cosmic String from D-term Inflation and Curvaton
• P-term, D-term and F-term inflation
• WMAP constraints on inflationary models with global defects
• Cosmic structure formation in Hybrid Inflation models
• N=2 Supersymmetry and de Sitter space
• Cosmic microwave background bispectrum and slow roll inflation
• Cosmic Strings as the Source of Small-Scale Microwave Background Anisotropy
• Features in the primordial power spectrum of double D-term inflation
• A practical model for cosmic (p,q) superstrings
• Cosmological perturbations and the reionization epoch
• Scaling configurations of cosmic superstring networks and their cosmological implications
• Observational constraints on cosmic strings: Bayesian analysis in a three dimensional parameter space
• Dynamics and properties of chiral cosmic strings in Minkowski space
• Heterotic Cosmic Strings
• CMB Bispectrum from Active Models of Structure Formation
• Fluctuations in the CMB Induced by Cosmic Strings: Methods and Formalism
• D-term inflation in non-minimal supergravity
• Probing CMB Non-Gaussianity Using Local Curvature
• The Rise and Fall of the Cosmic String Theory for Cosmological Perturbations
• Measuring Cosmic Defect Correlations in Liquid Crystals
• Primordial Adiabatic Fluctuations from Cosmic Defects
• Searching the Footprint of WIMPZILLAs
• Estimating the weak-lensing rotation signal in radio cosmic shear surveys
• Wave effect in gravitational lensing by a cosmic string
• Chiral cosmic strings in supergravity
• Cosmological Consequences of String-forming Open Inflation Models
• Self-intersections and gravitational properties of chiral cosmic strings in Minkowski space
• Cosmological parameter dependence in local string theories of structure formation
• Cosmic strings in a space-time with positive cosmological constant
• Inflation in Supersymmetric Cosmic String Theories
• Curvature-induced phase transitions in the inflationary universe - Supersymmetric Nambu-Jona-Lasinio Model in de Sitter spacetime -
• The statistical physics of cosmological networks of string loops
• Causal perturbation theory in general FRW cosmologies I: energy momentum conservation and matching conditions
• Assessment and Outlook
• The growth of linear perturbations in generic defect models for structure formation
• Cosmic superstring trajectories in warped compactifications
• Dynamics and Properties of Chiral Cosmic Strings
• Can Superconducting Cosmic Strings Piercing Seed Black Holes Generate Supermassive Black Holes in the Early Universe?
• Evolution of FLRW spacetime after the birth of a cosmic string
• Primordial Gaussian Fluctuations from Cosmic Defects
• A nearly cylindrically symmetric source in the Brans-Dicke gravity as the generator of the rotational curves of the galaxies
• String Imprints from a Pre-inflationary Era
• PhD Thesis: String theory in the early universe
• Fibration, Nexus and Cosmological Composite Topological Defects in Uniaxially Disordered Superfluid ${}^3$He
• Nonlinear Effects in the Cosmic Microwave Background