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SUMMARY:Magnetic field amplification in protoneutron stars - Dr. Jérôme 
 Guilet (CEA Saclay)
DTSTART:20191021T130000Z
DTEND:20191021T140000Z
UID:TALK129223@talks.cam.ac.uk
CONTACT:Chris Hamilton
DESCRIPTION:Extremely strong magnetic fields of the order of 10^15 Gauss a
 re required to explain the properties of magnetars\, the most magnetic neu
 tron stars. Such a strong magnetic field is expected to play an important 
 role for the dynamics of core-collapse supernovae\, and in the presence of
  rapid rotation may power superluminous supernovae and hypernovae associat
 ed to long gamma-ray bursts. The origin of these strong magnetic fields re
 mains\, however\, obscure and most likely requires an amplification over s
 everal orders of magnitude in the protoneutron star. I will review our cur
 rent understanding of the physical processes that may lead to this magneti
 c field amplification\, including the magnetorotational instability and th
 e convective dynamo. 
LOCATION:MR14\,  Centre for Mathematical Sciences\, Wilberforce Road\, Cam
 bridge
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