New constraints on the primordial magnetic field

Journal Article · Fri Jan 15 04:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.023008· OSTI ID:21409032

Yamazaki, Dai G ^[1]; Ichiki, Kiyotomo ^[2]; Kajino, Toshitaka ^[3]; Mathews, Grant J ^[4]

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1. Institute of Astronomy and Astrophysics, Academia Sinica, 11F of Astronomy-Mathematics Building, National Taiwan University, No.1, Roosevelt Road, Sec. 4 Taipei 10617, Taiwan (China)
2. Department of Physics and Astrophysics, Nagoya University, Nagoya 464-8602 (Japan)
3. National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588 (Japan)
4. Center for Astrophysics, Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556 (United States)

We present the newest statistical and numerical analysis of the matter and cosmic microwave background power spectrum with effects of the primordial magnetic field (PMF) included. New limits to the PMF strength and power spectral index are obtained based upon the accumulated data for both the matter and CMB power spectra on small angular scales. We find that a maximum develops in the probability distribution for a magnitude of the PMF of |B{sub {lambda}|}=0.85{+-}1.25({+-}1{sigma}) nG on a comoving scale of at 1 Mpc, corresponding to upper limits of <2.10 nG (68% CL) and <2.98 nG (95% CL). While for the power spectral index we find n{sub B}=-2.37{sub -0.73}{sup +0.88}({+-}1{sigma}), corresponding to upper limits of <-1.19 (68% CL) and <-0.25 (95% CL). This result provides new constraints on models for magnetic field generation and the physics of the early universe. We conclude that future observational programs for the CMB and matter power spectrum will likely provide not only upper limits but also lower limits to the PMF parameters.

• OSTI ID: 21409032
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 2 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DISTRIBUTION
ELECTROMAGNETIC RADIATION
MAGNETIC FIELDS
MATHEMATICS
MATTER
MICROWAVE RADIATION
NUMERICAL ANALYSIS
PROBABILITY
RADIATIONS
RELICT RADIATION
SPECTRA
UNIVERSE