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An extension of the Parker bound on the flux scrF of magnetic monopoles leads to a stronger bound than obtained previously. The survival and growth of a small galactic seed field requires scrF{≤}10^-16(m/10¹⁷ GeV) cm^-2 s^-1 sr^-1. This new limit rules out the possibility that monopoles much lighter than 10¹⁷ GeV/c² can provide the closure density of the Universe.
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Adams et al. (1993) studied this question.
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