Effect of Primordial Magnetic Field on Seeds for Large Scale Structure

Abstract

Magnetic field plays a very important role in many astronomical phenomena at various scales of the universe. It is no exception in the early universe. Since the energy density, pressure, and tension of the primordial magnetic field affect gravitational collapses of plasma, the formation of seeds for large scale structures should be influenced by them. Here we numerically investigate the effects of stochastic primordial magnetic field on the seeds of large scale structures in the universe in detail. We found that the amplitude ratio between the density spectra with and without PMF ($|P(k)/P_0(k)|$ at $k>0.2$ Mpc${}^{-1}$) lies between 75% and 130% at present for the range of PMF strengths 0.5 nG $<B_{\lambda }<1.0$ nG, depending on the spectral index of PMF and the correlation between the matter density and the PMF distributions.

20 pages, 5 figures, submitted to PRD 23 Jan 2006, Revised 02 Oct 2006, accepted for publication in PRD

References in corpus (4)

• CMB anisotropies from primordial inhomogeneous magnetic fields
• Generation of Cosmological Seed Magnetic Fields from Inflation with Cutoff
• Constraints on the Evolution of the Primordial Magnetic Field from the Small-Scale Cosmic Microwave Background Angular Anisotropy
• Tight coupling expansion and fully inhomogeneous magnetic fields

Cited by in corpus (14)

• Effects of a Primordial Magnetic Field on Low and High Multipoles of the CMB
• The Search for a Primordial Magnetic Field
• Primordial magnetic fields and formation of molecular hydrogen
• Cosmic Magnetism in Centimeter and Meter Wavelength Radio Astronomy
• Evolution of primordial magnetic fields during large-scale structure formation
• Effects of power law primordial magnetic field on big bang nucleosynthesis
• Constraints on the Primordial Magnetic Field from ${\sigma }_8$
• Primordial magnetic fields during the cosmic dawn in light of EDGES 21-cm signal
• CMB with the background primordial magnetic field
• Warm inflation in the presence of magnetic fields
• Power spectrum of post-inflationary primordial magnetic fields
• Diamagnetic field states in cosmological plasmas
• Inflationary and phase-transitional primordial magnetic fields in galaxy clusters
• Magnetization of fluid phonons and large-scale curvature perturbations