Effect of primordial magnetic field on seeds for large scale structure
- Department of Astronomy, Graduate School of Science, University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan)
- Research Center for the Early Universe, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan)
- The Graduate University for Advanced Studies(SOKENDAI), Mitaka, Tokyo 181-8588 (Japan)
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 (vertical bar P(k)/P{sub 0}(k) vertical bar at k>0.2 Mpc{sup -1}) lies between 75% and 130% at present for the range of PMF strengths 0.5nG<B{sub {lambda}}<1.0nG, depending on the spectral index of PMF and the correlation between the matter density and the PMF distributions.
- OSTI ID:
- 20868188
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 74, Issue 12; Other Information: DOI: 10.1103/PhysRevD.74.123518; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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