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Chen, Gang and Mukharjee, Pia and Kahniashvili, Tina and Ratra, Bharat and Wang, Yun (2004) Looking for Cosmological Alfvén Waves in Wilkinson Microwave Anisotropy Probe Data. Astrophysical Journal, 661. pp. 655-659.
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Abstract
A primordial cosmological magnetic field induces and supports vorticity or Alfvén waves, which in turn generate cosmic microwave background (CMB) anisotropies. A homogeneous primordial magnetic field with fixed direction induces correlations between the al-1,m and al+1,m multipole coefficients of the CMB temperature anisotropy field. We discuss the constraints that can be placed on the strength of such a primordial magnetic field using CMB anisotropy data from the Wilkinson Microwave Anisotropy Probe experiment. We place 3 σ upper limits on the strength of the magnetic field of B<15 nG for vector perturbation spectral index n=-5 and B<1.7 nG for n=-7.
| Item Type: | Article |
|---|---|
| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
| Depositing User: | Prof. Tina Kahniashvili |
| Date Deposited: | 27 Jan 2014 09:00 |
| Last Modified: | 27 Mar 2015 06:55 |
| URI: | http://eprints.iliauni.edu.ge/id/eprint/651 |
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