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Multi-scale analysis of compressible fluctuations in the solar wind
Compressible plasma turbulence is investigated in the fast solar wind at proton kinetic scales by the combined use of electron density and magnetic field measurements. Both the scale-dependent cross-correlation (CC) and the reduced magnetic helicity (σm) are used in tandem to determine the propertie...
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Published in: | Annales geophysicae (1988) 2018-01, Vol.36 (1), p.47-52 |
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container_title | Annales geophysicae (1988) |
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creator | Roberts, Owen W. Narita, Yasuhito Escoubet, C.-Philippe |
description | Compressible plasma turbulence is investigated in the
fast solar wind at proton kinetic scales by the combined use of electron
density and magnetic field measurements. Both the scale-dependent
cross-correlation (CC) and the reduced magnetic helicity
(σm) are used in tandem to determine the properties of the
compressible fluctuations at proton kinetic scales. At inertial scales the
turbulence is hypothesised to contain a mixture of Alfvénic and slow waves,
characterised by weak magnetic helicity and anti-correlation between magnetic
field strength B and electron density ne. At proton kinetic scales the
observations suggest that the fluctuations have stronger positive magnetic
helicities as well as strong anti-correlations within the frequency range
studied. These results are interpreted as being characteristic of either
counter-propagating kinetic Alfvén wave packets or a mixture of
anti-sunward kinetic Alfvén waves along with a component of kinetic slow
waves. Keywords. Interplanetary physics (MHD waves and turbulence) |
doi_str_mv | 10.5194/angeo-36-47-2018 |
format | article |
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fast solar wind at proton kinetic scales by the combined use of electron
density and magnetic field measurements. Both the scale-dependent
cross-correlation (CC) and the reduced magnetic helicity
(σm) are used in tandem to determine the properties of the
compressible fluctuations at proton kinetic scales. At inertial scales the
turbulence is hypothesised to contain a mixture of Alfvénic and slow waves,
characterised by weak magnetic helicity and anti-correlation between magnetic
field strength B and electron density ne. At proton kinetic scales the
observations suggest that the fluctuations have stronger positive magnetic
helicities as well as strong anti-correlations within the frequency range
studied. These results are interpreted as being characteristic of either
counter-propagating kinetic Alfvén wave packets or a mixture of
anti-sunward kinetic Alfvén waves along with a component of kinetic slow
waves. Keywords. Interplanetary physics (MHD waves and turbulence)</description><identifier>ISSN: 1432-0576</identifier><identifier>ISSN: 0992-7689</identifier><identifier>EISSN: 1432-0576</identifier><identifier>DOI: 10.5194/angeo-36-47-2018</identifier><language>eng</language><publisher>Katlenburg-Lindau: Copernicus GmbH</publisher><subject>Alfven waves ; Analysis ; Compressibility ; Correlation ; Correlation analysis ; Electron density ; Field strength ; Fluctuations ; Frequency ranges ; Helicity ; Magnetic field ; Magnetic fields ; Magnetic properties ; Magnetohydrodynamic turbulence ; Multiscale analysis ; Physics ; Plasma ; Plasma turbulence ; Plasmas (physics) ; Protons ; Solar wind ; Turbulence ; Wave packets ; Wave propagation</subject><ispartof>Annales geophysicae (1988), 2018-01, Vol.36 (1), p.47-52</ispartof><rights>COPYRIGHT 2018 Copernicus GmbH</rights><rights>2018. This work is published under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c418t-6a9263b012f9ed356b58123221e755273dfdbe89709bdffd658b9e655e06369a3</citedby><cites>FETCH-LOGICAL-c418t-6a9263b012f9ed356b58123221e755273dfdbe89709bdffd658b9e655e06369a3</cites><orcidid>0000-0002-3913-1353</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.proquest.com/docview/2184400818/fulltextPDF?pq-origsite=primo$$EPDF$$P50$$Gproquest$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.proquest.com/docview/2184400818?pq-origsite=primo$$EHTML$$P50$$Gproquest$$Hfree_for_read</linktohtml><link.rule.ids>314,780,784,25753,27924,27925,37012,44590,75126</link.rule.ids></links><search><creatorcontrib>Roberts, Owen W.</creatorcontrib><creatorcontrib>Narita, Yasuhito</creatorcontrib><creatorcontrib>Escoubet, C.-Philippe</creatorcontrib><title>Multi-scale analysis of compressible fluctuations in the solar wind</title><title>Annales geophysicae (1988)</title><description>Compressible plasma turbulence is investigated in the
fast solar wind at proton kinetic scales by the combined use of electron
density and magnetic field measurements. Both the scale-dependent
cross-correlation (CC) and the reduced magnetic helicity
(σm) are used in tandem to determine the properties of the
compressible fluctuations at proton kinetic scales. At inertial scales the
turbulence is hypothesised to contain a mixture of Alfvénic and slow waves,
characterised by weak magnetic helicity and anti-correlation between magnetic
field strength B and electron density ne. At proton kinetic scales the
observations suggest that the fluctuations have stronger positive magnetic
helicities as well as strong anti-correlations within the frequency range
studied. These results are interpreted as being characteristic of either
counter-propagating kinetic Alfvén wave packets or a mixture of
anti-sunward kinetic Alfvén waves along with a component of kinetic slow
waves. Keywords. Interplanetary physics (MHD waves and turbulence)</description><subject>Alfven waves</subject><subject>Analysis</subject><subject>Compressibility</subject><subject>Correlation</subject><subject>Correlation analysis</subject><subject>Electron density</subject><subject>Field strength</subject><subject>Fluctuations</subject><subject>Frequency ranges</subject><subject>Helicity</subject><subject>Magnetic field</subject><subject>Magnetic fields</subject><subject>Magnetic properties</subject><subject>Magnetohydrodynamic turbulence</subject><subject>Multiscale analysis</subject><subject>Physics</subject><subject>Plasma</subject><subject>Plasma turbulence</subject><subject>Plasmas (physics)</subject><subject>Protons</subject><subject>Solar wind</subject><subject>Turbulence</subject><subject>Wave packets</subject><subject>Wave propagation</subject><issn>1432-0576</issn><issn>0992-7689</issn><issn>1432-0576</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><sourceid>PIMPY</sourceid><sourceid>DOA</sourceid><recordid>eNpNUU1LAzEQXUTBWr17XPC8Nd-bHEvxCxQveg7JZlJTtpua7CL998ZWROYww8x7j5l5VXWN0YJjxW7NsIbYUNGwtiEIy5NqhhklDeKtOP1Xn1cXOW8QQgIrOatWL1M_hiZ3pofaDKbf55Dr6OsubncJcg62DHw_deNkxhCHXIehHj-gzrE3qf4Kg7uszrzpM1z95nn1fn_3tnpsnl8fnlbL56ZjWI6NMIoIahEmXoGjXFguMaGEYGg5Jy113lmQqkXKOu-d4NIqEJwDElQoQ-fV01HXRbPRuxS2Ju11NEEfGjGttUlj6HrQ4FpiMFagrGEWuCofkdJZhQVnDtqidXPU2qX4OUEe9SZOqdyfNcGSMYQklgW1OKLW5T06DD6OyXQlHGxDFwfwofSXnBChFEK0ENCR0KWYcwL_tyZG-scnffBJU6FZq398ot8dVoWO</recordid><startdate>20180112</startdate><enddate>20180112</enddate><creator>Roberts, Owen W.</creator><creator>Narita, Yasuhito</creator><creator>Escoubet, C.-Philippe</creator><general>Copernicus GmbH</general><general>Copernicus Publications</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>7TN</scope><scope>7UA</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BFMQW</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>GNUQQ</scope><scope>H8D</scope><scope>H96</scope><scope>HCIFZ</scope><scope>KL.</scope><scope>L.G</scope><scope>L6V</scope><scope>L7M</scope><scope>M7S</scope><scope>P5Z</scope><scope>P62</scope><scope>PATMY</scope><scope>PCBAR</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>PYCSY</scope><scope>DOA</scope><orcidid>https://orcid.org/0000-0002-3913-1353</orcidid></search><sort><creationdate>20180112</creationdate><title>Multi-scale analysis of compressible fluctuations in the solar wind</title><author>Roberts, Owen W. ; Narita, Yasuhito ; Escoubet, C.-Philippe</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c418t-6a9263b012f9ed356b58123221e755273dfdbe89709bdffd658b9e655e06369a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Alfven waves</topic><topic>Analysis</topic><topic>Compressibility</topic><topic>Correlation</topic><topic>Correlation analysis</topic><topic>Electron density</topic><topic>Field strength</topic><topic>Fluctuations</topic><topic>Frequency ranges</topic><topic>Helicity</topic><topic>Magnetic field</topic><topic>Magnetic fields</topic><topic>Magnetic properties</topic><topic>Magnetohydrodynamic turbulence</topic><topic>Multiscale analysis</topic><topic>Physics</topic><topic>Plasma</topic><topic>Plasma turbulence</topic><topic>Plasmas (physics)</topic><topic>Protons</topic><topic>Solar wind</topic><topic>Turbulence</topic><topic>Wave packets</topic><topic>Wave propagation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Roberts, Owen W.</creatorcontrib><creatorcontrib>Narita, Yasuhito</creatorcontrib><creatorcontrib>Escoubet, C.-Philippe</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni)</collection><collection>ProQuest Central</collection><collection>Advanced Technologies & Aerospace Collection</collection><collection>Agricultural & Environmental Science Collection</collection><collection>ProQuest Central Essentials</collection><collection>AUTh Library subscriptions: ProQuest Central</collection><collection>Continental Europe Database</collection><collection>Technology Collection</collection><collection>Natural Science Collection</collection><collection>Earth, Atmospheric & Aquatic Science Collection</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>ProQuest Central Student</collection><collection>Aerospace Database</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>SciTech Premium Collection</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>ProQuest Engineering Collection</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Engineering Database</collection><collection>Advanced Technologies & Aerospace Database</collection><collection>ProQuest Advanced Technologies & Aerospace Collection</collection><collection>Environmental Science Database</collection><collection>Earth, Atmospheric & Aquatic Science Database</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering collection</collection><collection>Environmental Science Collection</collection><collection>Open Access: DOAJ - Directory of Open Access Journals</collection><jtitle>Annales geophysicae (1988)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Roberts, Owen W.</au><au>Narita, Yasuhito</au><au>Escoubet, C.-Philippe</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Multi-scale analysis of compressible fluctuations in the solar wind</atitle><jtitle>Annales geophysicae (1988)</jtitle><date>2018-01-12</date><risdate>2018</risdate><volume>36</volume><issue>1</issue><spage>47</spage><epage>52</epage><pages>47-52</pages><issn>1432-0576</issn><issn>0992-7689</issn><eissn>1432-0576</eissn><abstract>Compressible plasma turbulence is investigated in the
fast solar wind at proton kinetic scales by the combined use of electron
density and magnetic field measurements. Both the scale-dependent
cross-correlation (CC) and the reduced magnetic helicity
(σm) are used in tandem to determine the properties of the
compressible fluctuations at proton kinetic scales. At inertial scales the
turbulence is hypothesised to contain a mixture of Alfvénic and slow waves,
characterised by weak magnetic helicity and anti-correlation between magnetic
field strength B and electron density ne. At proton kinetic scales the
observations suggest that the fluctuations have stronger positive magnetic
helicities as well as strong anti-correlations within the frequency range
studied. These results are interpreted as being characteristic of either
counter-propagating kinetic Alfvén wave packets or a mixture of
anti-sunward kinetic Alfvén waves along with a component of kinetic slow
waves. Keywords. Interplanetary physics (MHD waves and turbulence)</abstract><cop>Katlenburg-Lindau</cop><pub>Copernicus GmbH</pub><doi>10.5194/angeo-36-47-2018</doi><tpages>6</tpages><orcidid>https://orcid.org/0000-0002-3913-1353</orcidid><oa>free_for_read</oa></addata></record> |
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subjects | Alfven waves Analysis Compressibility Correlation Correlation analysis Electron density Field strength Fluctuations Frequency ranges Helicity Magnetic field Magnetic fields Magnetic properties Magnetohydrodynamic turbulence Multiscale analysis Physics Plasma Plasma turbulence Plasmas (physics) Protons Solar wind Turbulence Wave packets Wave propagation |
title | Multi-scale analysis of compressible fluctuations in the solar wind |
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