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PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:1
UID:UW-Physics-Event-4648
DTSTART:20171127T180000Z
DTEND:20171127T190000Z
DTSTAMP:20260419T003851Z
LAST-MODIFIED:20171111T200152Z
LOCATION:Chamberlin 2241
SUMMARY:Magnetic monopoles on cosmic scales\, Plasma Physics (Physics/
 ECE/NE 922) Seminar\, Prof. Mikhail Medvedev\, University of Kansas
DESCRIPTION:Existing theoretical and observational constraints on the 
 abundance of magnetic monopoles are limited. In this talk\, we will de
 monstrate that an ensemble of monopoles forms a plasma whose propertie
 s are well determined. The collective effects -- the benchmark of an e
 lectromagnetic plasma --  place new tight constraints on the cosmologi
 cal abundance of monopoles. In particular\, the existence of micro-Gau
 ss magnetic fields in galaxy clusters and radio relics implies that th
 e cosmological density parameter of monopoles is well below unity\, wh
 ich precludes them from being the dark matter. Furthermore\, we will d
 iscuss that the monopole plasma may reveal itself on the sky as "zebra
  patterns" of an alternating magnetic field and may even be responsibl
 e for origin of the observed magnetic fields in galaxy clusters.
URL:https://www.physics.wisc.edu/events/?id=4648
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