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The effect of diamagnetic drift on motion of the dayside magnetopause reconnection line

Record type: Article

Magnetic reconnection at the magnetopause occurs with a large density asymmetry and for a large range of magnetic shears. In these conditions, a motion of the X line has been predicted in the direction of the electron diamagnetic drift. When this motion is super Alfvenic, reconnection should be suppressed. We analysed a large data set of Double Star TC-1 dayside magnetopause crossings, which includes reconnection and nonreconnection events. Moreover, it also includes several events during which TC-1 is near the X line. With these close events, we verified the diamagnetic suppression condition with local observations near the X line. Moreover, with the same close events, we also studied the motion of the X line along the magnetopause. It is found that, when reconnection is not suppressed, the X line moves northward or southward according to the orientation of the guide field, which is related to the interplanetary magnetic field BY component, in agreement with the diamagnetic drift.

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Citation

Trenchi, L., Marcucci, M.F. and Fear, R.C. (2015) The effect of diamagnetic drift on motion of the dayside magnetopause reconnection line Geophysical Research Letters, 42, (15), pp. 6129-6136. (doi:10.1002/2015GL065213).

More information

Accepted/In Press date: 11 July 2015
e-pub ahead of print date: 18 July 2015
Published date: 3 August 2015
Organisations: Astronomy Group

Identifiers

Local EPrints ID: 394037
URI: http://eprints.soton.ac.uk/id/eprint/394037
ISSN: 0094-8276
PURE UUID: 04235e7b-be08-4e92-9bf6-aca380408395
ORCID for R.C. Fear: ORCID iD orcid.org/0000-0003-0589-7147

Catalogue record

Date deposited: 11 May 2016 08:29
Last modified: 17 Jul 2017 19:03

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Contributors

Author: L. Trenchi
Author: M.F. Marcucci
Author: R.C. Fear ORCID iD

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