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Magnets in Space

• Alyssa A. Goodman
• Harvard-Smithsonian Center for Astrophysics

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Magnetic Field Lines
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Our Sun
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Magnetic Fields Dancing on the Sun
http//vestige.lmsal.com/TRACE/
Images from NASAs TRACE Satellite
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Earthlings Saved by Magnetic Fields!
but not the poor (surface) Martians, or
Venusians!
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Earthlings Saved by Magnetic Fields!
Aurora Borealis
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A Star-Forming Region
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The Old(er), The Young the Unborn
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Star and Planet Formation
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What magnetic fields have to do with this whole
picture?
SNe/GRB
H II Regions
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Magnetic Fields in Star Forming Gas
b0.01
b1

• Driven Turbulence M? K no gravity
• Colors log density
• Computational volume 2563
• Dark blue lines B-field
• Red isosurface of passive contaminant after
  saturation

Stone, Gammie Ostriker 1999
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Star Formation the Easy Way (that doesnt work)
Fragments Collapse Under Gravity into
Protostars time105 years
Global Instability (e.g. Jeans) Fragments Cloud
(hierarchically) time106 years Hoyle 1953
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Ta-Da
A Group of Young Zero-Age Main Sequence Stars
is Born
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The (Beautiful) Ugly Truth
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The History of the Universe