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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". |
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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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