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Short-lived bursts of plasma leaping outward from the sun contributeto the mysteriously well-heated outer solar atmosphere



 
 
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Old January 6th 11, 09:28 PM posted to sci.astro.amateur,sci.physics
Sam Wormley[_2_]
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Default Short-lived bursts of plasma leaping outward from the sun contributeto the mysteriously well-heated outer solar atmosphere

NEWS: Plasma Jets Pump Heat into the Sun's Sizzling Corona
Short-lived bursts of plasma leaping outward from the sun contribute to
the mysteriously well-heated outer solar atmosphere

http://www.scientificamerican.com/ar...SA_DD_20110106

"Various explanations have been put forth, from sound waves or magnetic
waves dissipating in the upper solar atmosphere, or corona, to short
bursts of energy known as nanoflares erupting as tangled magnetic field
lines in the corona reconnect. Now observations from a new generation of
sun-observing spacecraft are implicating a different mechanism, one that
could provide the corona with a significant portion of its heat by
continually delivering hot ionized gas, or plasma, to the upper atmosphere".
  #2  
Old January 6th 11, 10:38 PM posted to sci.astro.amateur,sci.physics
Sam Wormley[_2_]
external usenet poster
 
Posts: 3,966
Default Short-lived bursts of plasma leaping outward from the sun contributeto the mysteriously well-heated outer solar atmosphere

On 1/6/11 2:28 PM, Sam Wormley wrote:
NEWS: Plasma Jets Pump Heat into the Sun's Sizzling Corona
Short-lived bursts of plasma leaping outward from the sun contribute to
the mysteriously well-heated outer solar atmosphere

http://www.scientificamerican.com/ar...SA_DD_20110106


"Various explanations have been put forth, from sound waves or magnetic
waves dissipating in the upper solar atmosphere, or corona, to short
bursts of energy known as nanoflares erupting as tangled magnetic field
lines in the corona reconnect. Now observations from a new generation of
sun-observing spacecraft are implicating a different mechanism, one that
could provide the corona with a significant portion of its heat by
continually delivering hot ionized gas, or plasma, to the upper
atmosphere".


Physicists find new clue in coronal heating mystery
http://physicsworld.com/cws/article/news/44717

"Spicules play a significant role in coronal heating, which doesn't fit
any of the current theories. This also suggests that there is
significant heating going on in the first few thousands of kilometres
[of the corona], which is very different from what people have assumed
before," De Pontieu told physicsworld.com. When the spicule jets occur
on the solar disc they leave a tell-tale signature in the spectral lines
observed in the chromosphe fast-occurring blue-shifts, known as rapid
blue-shift events (RBEs). De Pontieu used data from the Solar Optical
Telescope (SOT), aboard the Sun-orbiting Hinode spacecraft, to build up
a catalogue of RBEs, which he then compared to coronal data from NASA's
Solar Dynamics Observatory.
 




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