Statistics – Computation
Scientific paper
Mar 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.237..109m&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 237, March 1, 1989, p. 109-117.
Statistics
Computation
14
Background Radiation, Cosmology, Interstellar Magnetic Fields, Microwaves, Nuclear Fusion, Astronomical Models, Computational Astrophysics, Perturbation Theory, Universe
Scientific paper
The possible role of a large-scale relic magnetic field in the history of the universe is considered. The perturbation of the cosmic microwave background radiation on large angular scales due to a homogeneous magnetic field is estimated in a simple relativistic model. This allows corresponding limits to be placed on the magnitude of any such large-scale relic magnetic field at the present time. These limits are essentially the strongest which can be set on the largest scales. A corresponding bound is obtained by use of the requirement that the field should not spoil the predictions of primordial nucleosynthesis. It is noted that the existence of large-scale cosmic magnetic fields would circumvent the limits previously set - also on the basis of nucleosynthesis considerations - on the large-scale anisotropy now present in the universe.
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