Cluster Finds Turbulent Eddies May Warm the Solar Wind
A 2-dimensional vision of the solar wind turbulence at the smallest scale seen yet, thanks to observations by Cluster satellites. The approximate location of the measurements is indicated on a graphic illustrating features of Earth’s magnetic environment. The inset shows conditions as would be seen facing the solar wind, with current sheets forming at the border of turbulent eddies. The trajectory of the Cluster spacecraft is marked on the inset by the black line and the color gradients represent the magnetic field strength intensity. Inset: NASA/J. Dorelli The sun ejects a continuous flow of electrically charged particles and magnetic fields in the form of the solar wind -- and this wind is hotter than it should be. A new study of data obtained by European Space Agency's Cluster spacecraft may help explain the mystery. The solar wind is made of an electrically-charged gas called plasma.
Keywords:
solar wind magnetic field current sheets Cluster Cluster spacecraft magnetic fields turbulence plasma data magnetic environment magnetic reconnection solar wind turbulence smaller scales small scales direct evidence magnetic field strength time current sheet solar wind plasma Cluster data help rotated magnetic field solar wind flow magnetic field lines magnetic field data particles small current sheets graphic illustrating features electrically charged particles sun European Space Agency energy Analysis Field Fluctuation Space Flight Center Physical Review Letters current sheet event heat small spatial structures Cluster satellites hot lower atmosphere high time resolution Università della Calabria rapid burst mode miles STAFF solar particles turbulence cascades magnetic energy single spacecraft 2-dimensional vision turbulent eddiesPeople:
Melvyn Goldstein
Overall Sentiment: -0.0481476
Relevance: 0.670413
| Sentiment | Quote |
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| -0.142096 | “For the first time, we were able to obtain direct evidence for the existence of current sheets at these very small scales, where dissipation of magnetic energy into heat is thought to occur,” said Melvyn Goldstein, ... |
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Silvia Perri
Overall Sentiment: 0.0298234
Relevance: 0.548082
| Sentiment | Quote |
|---|---|
| 0 | "During the 2004 observation, both spacecraft were so close that they observed almost simultaneously the same structure in the solar wind as it passed them by. The magnetic field data showed the typical signature of a current sheet crossing," says Silvia Perri ... |
| 0 | “This shows for the first time that the solar wind plasma is extremely structured at these very small scales,” says Perri. |
| 0.105052 | “This shows for the first time that the solar wind plasma is extremely structured at these very small scales,” says Perri. “It is clear that we are seeing a release of energy approaching smaller and smaller scales, which may contribute to the overall heating of the solar wind.” |
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Dorelli
Overall Sentiment: 0
Relevance: 0.455681
della Calabria
Overall Sentiment: 0.0673639
Relevance: 0.389068
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FieldTerminology: MMS
Overall Sentiment: 0
Relevance: 0.494597
Organization: NASA
Overall Sentiment: 0
Relevance: 0.595248
Disambiguation: Company | GovernmentAgency | AirportOperator | AwardPresentingOrganization | SoftwareDeveloper | SpaceAgency | SpacecraftManufacturerReferences:
Company: European Space Agency
Overall Sentiment: 0.297001
Relevance: 0.491466
City: Greenbelt
Overall Sentiment: 0
Relevance: 0.452491
Facility: Goddard Space Flight Center
Overall Sentiment: 0
Relevance: 0.451844
Country: Italy
Overall Sentiment: 0.0800737
Relevance: 0.446178
Disambiguation: Location | HumanLanguage | PoliticalDistrict | Region | AdministrativeDivision | GovernmentalJurisdictionReferences:
StateOrCounty: Md
Overall Sentiment: 0
Relevance: 0.40949
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A new study of data obtained by the European Space Agency's Cluster spacecraft may help explain why the flow of electrically charged particles and magnetic fields from the sun, the solar wind, is hotter than it should be.
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Cluster Finds Turbulent Eddies May Warm the Solar Wind
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