Ion kinetics in a hot flow anomaly: MMS observations
Ion kinetics in a hot flow anomaly: MMS observations
Hot Flow Anomalies (HFAs) are transients observed at planetary bow shocks, formed by the shock interaction with a convected interplanetary current sheet. The primary interpretation relies on reflected ions channeled upstream along the current sheet. The short duration of HFAs has made direct observations of this process difficult. We employ high resolution measurements by NASA's Magnetospheric Multiscale Mission to probe the ion microphysics within a HFA. Magnetospheric Multiscale Mission data reveal a smoothly varying internal density and pressure, which increase toward the trailing edge of the HFA, sweeping up particles trapped within the current sheet. We find remnants of reflected or other backstreaming ions traveling along the current sheet, but most of these are not fast enough to out-run the incident current sheet convection. Despite the high level of internal turbulence, incident and backstreaming ions appear to couple gyro-kinetically in a coherent manner.
bow shock, collisionless shocks, hot flow anomalies
11,520-11,529
Schwartz, Steven J.
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Avanov, Levon
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Turner, Drew
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Zhang, Hui
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Gingell, Imogen
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Eastwood, Jonathan P.
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Gershman, Daniel J.
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Johlander, Andreas
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Russell, Christopher T.
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Burch, James L.
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Dorelli, John C.
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Eriksson, Stefan
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Ergun, Robert E.
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Fuselier, Stephen A.
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Giles, Barbara L.
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Goodrich, Katherine A.
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Khotyaintsev, Yuri V.
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Lavraud, Benoit
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Lindqvist, Per Arne
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Oka, Mitsuo
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Phan, Tai Duc
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Strangeway, Robert J.
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Trattner, Karlheinz J.
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Torbert, Roy B.
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Vaivads, Andris
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Wei, Hanying
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Wilder, Frederick
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16 November 2018
Schwartz, Steven J.
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Avanov, Levon
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Turner, Drew
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Zhang, Hui
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Gingell, Imogen
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Eastwood, Jonathan P.
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Gershman, Daniel J.
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Johlander, Andreas
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Russell, Christopher T.
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Burch, James L.
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Dorelli, John C.
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Eriksson, Stefan
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Ergun, Robert E.
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Fuselier, Stephen A.
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Giles, Barbara L.
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Goodrich, Katherine A.
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Khotyaintsev, Yuri V.
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Lavraud, Benoit
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Lindqvist, Per Arne
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Oka, Mitsuo
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Phan, Tai Duc
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Strangeway, Robert J.
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Trattner, Karlheinz J.
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Torbert, Roy B.
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Vaivads, Andris
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Wei, Hanying
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Wilder, Frederick
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Schwartz, Steven J., Avanov, Levon, Turner, Drew, Zhang, Hui, Gingell, Imogen, Eastwood, Jonathan P., Gershman, Daniel J., Johlander, Andreas, Russell, Christopher T., Burch, James L., Dorelli, John C., Eriksson, Stefan, Ergun, Robert E., Fuselier, Stephen A., Giles, Barbara L., Goodrich, Katherine A., Khotyaintsev, Yuri V., Lavraud, Benoit, Lindqvist, Per Arne, Oka, Mitsuo, Phan, Tai Duc, Strangeway, Robert J., Trattner, Karlheinz J., Torbert, Roy B., Vaivads, Andris, Wei, Hanying and Wilder, Frederick
(2018)
Ion kinetics in a hot flow anomaly: MMS observations.
Geophysical Research Letters, 45 (21), .
(doi:10.1029/2018GL080189).
Abstract
Hot Flow Anomalies (HFAs) are transients observed at planetary bow shocks, formed by the shock interaction with a convected interplanetary current sheet. The primary interpretation relies on reflected ions channeled upstream along the current sheet. The short duration of HFAs has made direct observations of this process difficult. We employ high resolution measurements by NASA's Magnetospheric Multiscale Mission to probe the ion microphysics within a HFA. Magnetospheric Multiscale Mission data reveal a smoothly varying internal density and pressure, which increase toward the trailing edge of the HFA, sweeping up particles trapped within the current sheet. We find remnants of reflected or other backstreaming ions traveling along the current sheet, but most of these are not fast enough to out-run the incident current sheet convection. Despite the high level of internal turbulence, incident and backstreaming ions appear to couple gyro-kinetically in a coherent manner.
Text
Ion kinetics in a Hot Flow Anomaly: MMS Observations
- Accepted Manuscript
Text
2018GL080189
- Version of Record
More information
Accepted/In Press date: 14 October 2018
e-pub ahead of print date: 19 October 2018
Published date: 16 November 2018
Keywords:
bow shock, collisionless shocks, hot flow anomalies
Identifiers
Local EPrints ID: 439029
URI: http://eprints.soton.ac.uk/id/eprint/439029
ISSN: 0094-8276
PURE UUID: 9ccce9c8-c4de-44c3-9a5b-5603707393da
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Date deposited: 01 Apr 2020 16:32
Last modified: 06 Jun 2024 02:07
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Contributors
Author:
Steven J. Schwartz
Author:
Levon Avanov
Author:
Drew Turner
Author:
Hui Zhang
Author:
Jonathan P. Eastwood
Author:
Daniel J. Gershman
Author:
Andreas Johlander
Author:
Christopher T. Russell
Author:
James L. Burch
Author:
John C. Dorelli
Author:
Stefan Eriksson
Author:
Robert E. Ergun
Author:
Stephen A. Fuselier
Author:
Barbara L. Giles
Author:
Katherine A. Goodrich
Author:
Yuri V. Khotyaintsev
Author:
Benoit Lavraud
Author:
Per Arne Lindqvist
Author:
Mitsuo Oka
Author:
Tai Duc Phan
Author:
Robert J. Strangeway
Author:
Karlheinz J. Trattner
Author:
Roy B. Torbert
Author:
Andris Vaivads
Author:
Hanying Wei
Author:
Frederick Wilder
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