Eintrag weiter verarbeiten
Ion temperature anisotropy across a magnetotail reconnection jet
Gespeichert in:
| Zeitschriftentitel: | Geophysical Research Letters |
|---|---|
| Personen und Körperschaften: | , , , , |
| In: | Geophysical Research Letters, 42, 2015, 18, S. 7239-7247 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
American Geophysical Union (AGU)
|
| Schlagwörter: |
| author_facet |
Hietala, H. Drake, J. F. Phan, T. D. Eastwood, J. P. McFadden, J. P. Hietala, H. Drake, J. F. Phan, T. D. Eastwood, J. P. McFadden, J. P. |
|---|---|
| author |
Hietala, H. Drake, J. F. Phan, T. D. Eastwood, J. P. McFadden, J. P. |
| spellingShingle |
Hietala, H. Drake, J. F. Phan, T. D. Eastwood, J. P. McFadden, J. P. Geophysical Research Letters Ion temperature anisotropy across a magnetotail reconnection jet General Earth and Planetary Sciences Geophysics |
| author_sort |
hietala, h. |
| spelling |
Hietala, H. Drake, J. F. Phan, T. D. Eastwood, J. P. McFadden, J. P. 0094-8276 1944-8007 American Geophysical Union (AGU) General Earth and Planetary Sciences Geophysics http://dx.doi.org/10.1002/2015gl065168 <jats:title>Abstract</jats:title><jats:p>A significant fraction of the energy released by magnetotail reconnection appears to go into ion heating, but this heating is generally anisotropic. We examine ARTEMIS dual‐spacecraft observations of a long‐duration magnetotail exhaust generated by antiparallel reconnection in conjunction with particle‐in‐cell simulations, showing spatial variations in the anisotropy across the outflow far (>100<jats:italic>d</jats:italic><jats:sub><jats:italic>i</jats:italic></jats:sub>) downstream of the X line. A consistent pattern is found in both the spacecraft data and the simulations: While the total temperature across the exhaust is rather constant, near the boundaries <jats:italic>T</jats:italic><jats:sub><jats:italic>i</jats:italic>,||</jats:sub> dominates. The plasma is well above the firehose threshold within patchy spatial regions at |<jats:italic>B</jats:italic><jats:sub><jats:italic>X</jats:italic></jats:sub>|∈[0.1,0.5]<jats:italic>B</jats:italic><jats:sub>0</jats:sub>, suggesting that the drive for the instability is strong and the instability is too weak to relax the anisotropy. At the midplane ( <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="graphic/grl53378-math-0001.png" xlink:title="urn:x-wiley:grl:media:grl53378:grl53378-math-0001" />), <jats:italic>T</jats:italic><jats:sub><jats:italic>i</jats:italic>,⊥</jats:sub>><jats:italic>T</jats:italic><jats:sub><jats:italic>i</jats:italic>,||</jats:sub> and ions undergo Speiser‐like motion despite the large distance from the X line.</jats:p> Ion temperature anisotropy across a magnetotail reconnection jet Geophysical Research Letters |
| doi_str_mv |
10.1002/2015gl065168 |
| facet_avail |
Online Free |
| finc_class_facet |
Geologie und Paläontologie Geographie Physik |
| format |
ElectronicArticle |
| fullrecord |
blob:ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMTAwMi8yMDE1Z2wwNjUxNjg |
| id |
ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMTAwMi8yMDE1Z2wwNjUxNjg |
| institution |
DE-Gla1 DE-Zi4 DE-15 DE-Pl11 DE-Rs1 DE-105 DE-14 DE-Ch1 DE-L229 DE-D275 DE-Bn3 DE-Brt1 DE-D161 DE-Zwi2 |
| imprint |
American Geophysical Union (AGU), 2015 |
| imprint_str_mv |
American Geophysical Union (AGU), 2015 |
| issn |
0094-8276 1944-8007 |
| issn_str_mv |
0094-8276 1944-8007 |
| language |
English |
| mega_collection |
American Geophysical Union (AGU) (CrossRef) |
| match_str |
hietala2015iontemperatureanisotropyacrossamagnetotailreconnectionjet |
| publishDateSort |
2015 |
| publisher |
American Geophysical Union (AGU) |
| recordtype |
ai |
| record_format |
ai |
| series |
Geophysical Research Letters |
| source_id |
49 |
| title |
Ion temperature anisotropy across a magnetotail reconnection jet |
| title_unstemmed |
Ion temperature anisotropy across a magnetotail reconnection jet |
| title_full |
Ion temperature anisotropy across a magnetotail reconnection jet |
| title_fullStr |
Ion temperature anisotropy across a magnetotail reconnection jet |
| title_full_unstemmed |
Ion temperature anisotropy across a magnetotail reconnection jet |
| title_short |
Ion temperature anisotropy across a magnetotail reconnection jet |
| title_sort |
ion temperature anisotropy across a magnetotail reconnection jet |
| topic |
General Earth and Planetary Sciences Geophysics |
| url |
http://dx.doi.org/10.1002/2015gl065168 |
| publishDate |
2015 |
| physical |
7239-7247 |
| description |
<jats:title>Abstract</jats:title><jats:p>A significant fraction of the energy released by magnetotail reconnection appears to go into ion heating, but this heating is generally anisotropic. We examine ARTEMIS dual‐spacecraft observations of a long‐duration magnetotail exhaust generated by antiparallel reconnection in conjunction with particle‐in‐cell simulations, showing spatial variations in the anisotropy across the outflow far (>100<jats:italic>d</jats:italic><jats:sub><jats:italic>i</jats:italic></jats:sub>) downstream of the X line. A consistent pattern is found in both the spacecraft data and the simulations: While the total temperature across the exhaust is rather constant, near the boundaries <jats:italic>T</jats:italic><jats:sub><jats:italic>i</jats:italic>,||</jats:sub> dominates. The plasma is well above the firehose threshold within patchy spatial regions at |<jats:italic>B</jats:italic><jats:sub><jats:italic>X</jats:italic></jats:sub>|∈[0.1,0.5]<jats:italic>B</jats:italic><jats:sub>0</jats:sub>, suggesting that the drive for the instability is strong and the instability is too weak to relax the anisotropy. At the midplane (
<jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="graphic/grl53378-math-0001.png" xlink:title="urn:x-wiley:grl:media:grl53378:grl53378-math-0001" />), <jats:italic>T</jats:italic><jats:sub><jats:italic>i</jats:italic>,⊥</jats:sub>><jats:italic>T</jats:italic><jats:sub><jats:italic>i</jats:italic>,||</jats:sub> and ions undergo Speiser‐like motion despite the large distance from the X line.</jats:p> |
| container_issue |
18 |
| container_start_page |
7239 |
| container_title |
Geophysical Research Letters |
| container_volume |
42 |
| format_de105 |
Article, E-Article |
| format_de14 |
Article, E-Article |
| format_de15 |
Article, E-Article |
| format_de520 |
Article, E-Article |
| format_de540 |
Article, E-Article |
| format_dech1 |
Article, E-Article |
| format_ded117 |
Article, E-Article |
| format_degla1 |
E-Article |
| format_del152 |
Buch |
| format_del189 |
Article, E-Article |
| format_dezi4 |
Article |
| format_dezwi2 |
Article, E-Article |
| format_finc |
Article, E-Article |
| format_nrw |
Article, E-Article |
| _version_ |
1792342908497559568 |
| geogr_code |
not assigned |
| last_indexed |
2024-03-01T16:43:04.189Z |
| geogr_code_person |
not assigned |
| openURL |
url_ver=Z39.88-2004&ctx_ver=Z39.88-2004&ctx_enc=info%3Aofi%2Fenc%3AUTF-8&rfr_id=info%3Asid%2Fvufind.svn.sourceforge.net%3Agenerator&rft.title=Ion+temperature+anisotropy+across+a+magnetotail+reconnection+jet&rft.date=2015-09-28&genre=article&issn=1944-8007&volume=42&issue=18&spage=7239&epage=7247&pages=7239-7247&jtitle=Geophysical+Research+Letters&atitle=Ion+temperature+anisotropy+across+a+magnetotail+reconnection+jet&aulast=McFadden&aufirst=J.+P.&rft_id=info%3Adoi%2F10.1002%2F2015gl065168&rft.language%5B0%5D=eng |
| SOLR | |
| _version_ | 1792342908497559568 |
| author | Hietala, H., Drake, J. F., Phan, T. D., Eastwood, J. P., McFadden, J. P. |
| author_facet | Hietala, H., Drake, J. F., Phan, T. D., Eastwood, J. P., McFadden, J. P., Hietala, H., Drake, J. F., Phan, T. D., Eastwood, J. P., McFadden, J. P. |
| author_sort | hietala, h. |
| container_issue | 18 |
| container_start_page | 7239 |
| container_title | Geophysical Research Letters |
| container_volume | 42 |
| description | <jats:title>Abstract</jats:title><jats:p>A significant fraction of the energy released by magnetotail reconnection appears to go into ion heating, but this heating is generally anisotropic. We examine ARTEMIS dual‐spacecraft observations of a long‐duration magnetotail exhaust generated by antiparallel reconnection in conjunction with particle‐in‐cell simulations, showing spatial variations in the anisotropy across the outflow far (>100<jats:italic>d</jats:italic><jats:sub><jats:italic>i</jats:italic></jats:sub>) downstream of the X line. A consistent pattern is found in both the spacecraft data and the simulations: While the total temperature across the exhaust is rather constant, near the boundaries <jats:italic>T</jats:italic><jats:sub><jats:italic>i</jats:italic>,||</jats:sub> dominates. The plasma is well above the firehose threshold within patchy spatial regions at |<jats:italic>B</jats:italic><jats:sub><jats:italic>X</jats:italic></jats:sub>|∈[0.1,0.5]<jats:italic>B</jats:italic><jats:sub>0</jats:sub>, suggesting that the drive for the instability is strong and the instability is too weak to relax the anisotropy. At the midplane ( <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="graphic/grl53378-math-0001.png" xlink:title="urn:x-wiley:grl:media:grl53378:grl53378-math-0001" />), <jats:italic>T</jats:italic><jats:sub><jats:italic>i</jats:italic>,⊥</jats:sub>><jats:italic>T</jats:italic><jats:sub><jats:italic>i</jats:italic>,||</jats:sub> and ions undergo Speiser‐like motion despite the large distance from the X line.</jats:p> |
| doi_str_mv | 10.1002/2015gl065168 |
| facet_avail | Online, Free |
| finc_class_facet | Geologie und Paläontologie, Geographie, Physik |
| format | ElectronicArticle |
| format_de105 | Article, E-Article |
| format_de14 | Article, E-Article |
| format_de15 | Article, E-Article |
| format_de520 | Article, E-Article |
| format_de540 | Article, E-Article |
| format_dech1 | Article, E-Article |
| format_ded117 | Article, E-Article |
| format_degla1 | E-Article |
| format_del152 | Buch |
| format_del189 | Article, E-Article |
| format_dezi4 | Article |
| format_dezwi2 | Article, E-Article |
| format_finc | Article, E-Article |
| format_nrw | Article, E-Article |
| geogr_code | not assigned |
| geogr_code_person | not assigned |
| id | ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMTAwMi8yMDE1Z2wwNjUxNjg |
| imprint | American Geophysical Union (AGU), 2015 |
| imprint_str_mv | American Geophysical Union (AGU), 2015 |
| institution | DE-Gla1, DE-Zi4, DE-15, DE-Pl11, DE-Rs1, DE-105, DE-14, DE-Ch1, DE-L229, DE-D275, DE-Bn3, DE-Brt1, DE-D161, DE-Zwi2 |
| issn | 0094-8276, 1944-8007 |
| issn_str_mv | 0094-8276, 1944-8007 |
| language | English |
| last_indexed | 2024-03-01T16:43:04.189Z |
| match_str | hietala2015iontemperatureanisotropyacrossamagnetotailreconnectionjet |
| mega_collection | American Geophysical Union (AGU) (CrossRef) |
| physical | 7239-7247 |
| publishDate | 2015 |
| publishDateSort | 2015 |
| publisher | American Geophysical Union (AGU) |
| record_format | ai |
| recordtype | ai |
| series | Geophysical Research Letters |
| source_id | 49 |
| spelling | Hietala, H. Drake, J. F. Phan, T. D. Eastwood, J. P. McFadden, J. P. 0094-8276 1944-8007 American Geophysical Union (AGU) General Earth and Planetary Sciences Geophysics http://dx.doi.org/10.1002/2015gl065168 <jats:title>Abstract</jats:title><jats:p>A significant fraction of the energy released by magnetotail reconnection appears to go into ion heating, but this heating is generally anisotropic. We examine ARTEMIS dual‐spacecraft observations of a long‐duration magnetotail exhaust generated by antiparallel reconnection in conjunction with particle‐in‐cell simulations, showing spatial variations in the anisotropy across the outflow far (>100<jats:italic>d</jats:italic><jats:sub><jats:italic>i</jats:italic></jats:sub>) downstream of the X line. A consistent pattern is found in both the spacecraft data and the simulations: While the total temperature across the exhaust is rather constant, near the boundaries <jats:italic>T</jats:italic><jats:sub><jats:italic>i</jats:italic>,||</jats:sub> dominates. The plasma is well above the firehose threshold within patchy spatial regions at |<jats:italic>B</jats:italic><jats:sub><jats:italic>X</jats:italic></jats:sub>|∈[0.1,0.5]<jats:italic>B</jats:italic><jats:sub>0</jats:sub>, suggesting that the drive for the instability is strong and the instability is too weak to relax the anisotropy. At the midplane ( <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="graphic/grl53378-math-0001.png" xlink:title="urn:x-wiley:grl:media:grl53378:grl53378-math-0001" />), <jats:italic>T</jats:italic><jats:sub><jats:italic>i</jats:italic>,⊥</jats:sub>><jats:italic>T</jats:italic><jats:sub><jats:italic>i</jats:italic>,||</jats:sub> and ions undergo Speiser‐like motion despite the large distance from the X line.</jats:p> Ion temperature anisotropy across a magnetotail reconnection jet Geophysical Research Letters |
| spellingShingle | Hietala, H., Drake, J. F., Phan, T. D., Eastwood, J. P., McFadden, J. P., Geophysical Research Letters, Ion temperature anisotropy across a magnetotail reconnection jet, General Earth and Planetary Sciences, Geophysics |
| title | Ion temperature anisotropy across a magnetotail reconnection jet |
| title_full | Ion temperature anisotropy across a magnetotail reconnection jet |
| title_fullStr | Ion temperature anisotropy across a magnetotail reconnection jet |
| title_full_unstemmed | Ion temperature anisotropy across a magnetotail reconnection jet |
| title_short | Ion temperature anisotropy across a magnetotail reconnection jet |
| title_sort | ion temperature anisotropy across a magnetotail reconnection jet |
| title_unstemmed | Ion temperature anisotropy across a magnetotail reconnection jet |
| topic | General Earth and Planetary Sciences, Geophysics |
| url | http://dx.doi.org/10.1002/2015gl065168 |