The University of Southampton
University of Southampton Institutional Repository
Warning ePrints Soton is experiencing an issue with some file downloads not being available. We are working hard to fix this. Please bear with us.

Plasmoids in Saturn's magnetotail

Plasmoids in Saturn's magnetotail
Plasmoids in Saturn's magnetotail

Plasmoids in Saturn's magnetotail are identified by a reversal (northward turning) of the normally southward component of the magnetic field across the tail current sheet. Three large plasmoids have been identified by the Cassini magnetometer, one near 0300 local time at a planet-centered distance of 44 RS and two near midnight at 48-49 RS. (RS ≈60,300 km is Saturn's equatorial radius.) Two of these events, including in particular the 0300 event, coincided with current-sheet crossings by the spacecraft and thus provided sufficient plasma fluxes to determine ion composition and velocity moments from Cassini Plasma Spectrometer data. The composition was largely dominated by water-group ions, indicating an inner-magnetosphere source. The flow was subcorotational and strongly tailward, as expected for a plasmoid. Just before the in situ detection of the 0300 plasmoid, the Magnetospheric Imaging Instrument observed an outburst of energetic neutral atoms emanating from a location midway between Saturn and Cassini, probably a signature of the reconnection event that spawned the plasmoid.

2169-9380
Hill, T.W.
8627ecb2-6e74-447e-99e7-ab68cd86ab9a
Thomsen, M.F.
d0ea3839-9090-4fd7-84b1-d8b4162fce5d
Henderson, M.G.
8b14c275-d7ff-47f7-ad8f-7189b6d2e152
Tokar, R.L.
8213ad4b-5b3b-46b1-90ad-334b61c2d79c
Coates, A.J.
61022799-2e2b-46da-a964-23d9aaebe455
McAndrews, H.J.
0e419a05-f21c-413e-9913-462fc341171b
Lewis, G.R.
82ee88ed-c8ae-4aa4-baa5-d60b223f4f90
Mitchell, D.G.
a839f799-dbba-476e-a99f-24247ea2b2ca
Jackman, C.M.
9bc3456c-b254-48f1-ade0-912c5b8b4529
Russell, C.T.
0beb88bf-9d0e-4b75-80ae-61ba3776ce59
Dougherty, M.K.
aa297043-7e86-4501-952b-a6363edaaba8
Crary, F.J.
43ea810b-5052-4341-854a-4a891f104051
Young, D.T.
72205909-7b41-4c6e-9777-4e953bc2a0b2
Hill, T.W.
8627ecb2-6e74-447e-99e7-ab68cd86ab9a
Thomsen, M.F.
d0ea3839-9090-4fd7-84b1-d8b4162fce5d
Henderson, M.G.
8b14c275-d7ff-47f7-ad8f-7189b6d2e152
Tokar, R.L.
8213ad4b-5b3b-46b1-90ad-334b61c2d79c
Coates, A.J.
61022799-2e2b-46da-a964-23d9aaebe455
McAndrews, H.J.
0e419a05-f21c-413e-9913-462fc341171b
Lewis, G.R.
82ee88ed-c8ae-4aa4-baa5-d60b223f4f90
Mitchell, D.G.
a839f799-dbba-476e-a99f-24247ea2b2ca
Jackman, C.M.
9bc3456c-b254-48f1-ade0-912c5b8b4529
Russell, C.T.
0beb88bf-9d0e-4b75-80ae-61ba3776ce59
Dougherty, M.K.
aa297043-7e86-4501-952b-a6363edaaba8
Crary, F.J.
43ea810b-5052-4341-854a-4a891f104051
Young, D.T.
72205909-7b41-4c6e-9777-4e953bc2a0b2

Hill, T.W., Thomsen, M.F., Henderson, M.G., Tokar, R.L., Coates, A.J., McAndrews, H.J., Lewis, G.R., Mitchell, D.G., Jackman, C.M., Russell, C.T., Dougherty, M.K., Crary, F.J. and Young, D.T. (2008) Plasmoids in Saturn's magnetotail. Journal of Geophysical Research: Space Physics, 113 (A1), [A01214]. (doi:10.1029/2007JA012626).

Record type: Article

Abstract

Plasmoids in Saturn's magnetotail are identified by a reversal (northward turning) of the normally southward component of the magnetic field across the tail current sheet. Three large plasmoids have been identified by the Cassini magnetometer, one near 0300 local time at a planet-centered distance of 44 RS and two near midnight at 48-49 RS. (RS ≈60,300 km is Saturn's equatorial radius.) Two of these events, including in particular the 0300 event, coincided with current-sheet crossings by the spacecraft and thus provided sufficient plasma fluxes to determine ion composition and velocity moments from Cassini Plasma Spectrometer data. The composition was largely dominated by water-group ions, indicating an inner-magnetosphere source. The flow was subcorotational and strongly tailward, as expected for a plasmoid. Just before the in situ detection of the 0300 plasmoid, the Magnetospheric Imaging Instrument observed an outburst of energetic neutral atoms emanating from a location midway between Saturn and Cassini, probably a signature of the reconnection event that spawned the plasmoid.

This record has no associated files available for download.

More information

Published date: 1 January 2008

Identifiers

Local EPrints ID: 437133
URI: http://eprints.soton.ac.uk/id/eprint/437133
ISSN: 2169-9380
PURE UUID: 9060cc06-cb3c-4582-b6ba-2e178a6b85b1
ORCID for C.M. Jackman: ORCID iD orcid.org/0000-0003-0635-7361

Catalogue record

Date deposited: 17 Jan 2020 17:35
Last modified: 10 Nov 2021 03:35

Export record

Altmetrics

Contributors

Author: T.W. Hill
Author: M.F. Thomsen
Author: M.G. Henderson
Author: R.L. Tokar
Author: A.J. Coates
Author: H.J. McAndrews
Author: G.R. Lewis
Author: D.G. Mitchell
Author: C.M. Jackman ORCID iD
Author: C.T. Russell
Author: M.K. Dougherty
Author: F.J. Crary
Author: D.T. Young

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×