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No evidence for the localized heating of solar wind protons at intense velocity shear zones
dc.contributor.authorBorovsky, Joseph E.en_US
dc.contributor.authorSteinberg, John T.en_US
dc.date.accessioned2014-05-23T15:58:57Z
dc.date.available2015-05-04T14:37:25Zen_US
dc.date.issued2014-03en_US
dc.identifier.citationBorovsky, Joseph E.; Steinberg, John T. (2014). "No evidence for the localized heating of solar wind protons at intense velocity shear zones." Journal of Geophysical Research: Space Physics 119(3): 1455-1462.en_US
dc.identifier.issn2169-9380en_US
dc.identifier.issn2169-9402en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/106821
dc.description.abstractUsing measurements from the Wind spacecraft at 1 AU, the heating of protons in the solar wind at locations of intense velocity shear is examined. The 4321 sites of intense shear in fast coronal hole origin plasma are analyzed. The proton temperature, the proton specific entropy, and the proton number density at the locations of the shears are compared with the same quantities in the plasmas adjacent to the shears. A very slight but statistically significant enhancement of the proton temperature is seen at the sites of the shears, but it is accompanied by a larger enhancement of the proton number density at the sites of the shears. Consequently, there is no enhancement of the proton specific entropy at the shear sites, indicating no production of entropy; hence, no evidence for plasma heating is found at the sites of the velocity shears. Since the shearing velocities have appreciable Mach numbers, the authors suggest that there can be a slight adiabatic compression of the plasma at the shear zones. Key Points No proton heating is observed at the sites of intense velocity shear Temperature‐density signatures are consistent with adiabatic compressions The compressions could be associated with the large Mach numbers of the shearsen_US
dc.publisherPergamon Pressen_US
dc.publisherWiley Periodicals, Inc.en_US
dc.subject.otherSolar Wind Heatingen_US
dc.subject.otherVelocity Shearen_US
dc.subject.otherVorticityen_US
dc.titleNo evidence for the localized heating of solar wind protons at intense velocity shear zonesen_US
dc.typeArticleen_US
dc.rights.robotsIndexNoFollowen_US
dc.subject.hlbsecondlevelAstronomy and Astrophysicsen_US
dc.subject.hlbtoplevelScienceen_US
dc.description.peerreviewedPeer Revieweden_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/106821/1/jgra50896.pdf
dc.identifier.doi10.1002/2013JA019746en_US
dc.identifier.sourceJournal of Geophysical Research: Space Physicsen_US
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dc.owningcollnameInterdisciplinary and Peer-Reviewed


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