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PRODID:UW-Madison-Physics-Events
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SEQUENCE:1
UID:UW-Physics-Event-6165
DTSTART:20201022T203000Z
DTEND:20201022T220000Z
DTSTAMP:20240328T144050Z
LAST-MODIFIED:20201005T195416Z
LOCATION:Zoom meeting(see Abstract ) Coffee and tea 3:30 pm\, Talk 3:4
5 PM
SUMMARY:Scaling Laws for Large Scale Magnetic Fields in Stars and in t
he Laboratory\, Astronomy Colloquium\, Ethan Visniac\, John Hopkins Un
iversity
DESCRIPTION:The turbulent generation of large scale magnetic fields is
driven by the transport of magnetic helicity\, which is robustly cons
erved in conducting fluids. Some simple scaling laws emerge from this
. These can be extended by considering the relationship between shear
and rotation in turbulent convection. This work can be directly appl
ied to stellar magnetic fields for fully convective stars. Surprising
ly\, the same scaling laws seem to apply generally\, even in the prese
nce of stellar tachoclines. I will also discuss the prospects for appl
ying these insights to laboratory experiments.
\n
\nZoom Meeti
ng information:
\n
\nhttps://us02web.zoom.us/j/81750055728?pwd
=T3Y5c1lYZjNnb1ZOWUI1ZXhKMlZBQT09
\n
\nMeeting ID: 817 5005 57
28
\nPasscode: 000018
URL:https://www.physics.wisc.edu/events/?id=6165
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