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

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).


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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.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1002/2015GL065213
ISSNs: 0094-8276 (print)
Organisations: Astronomy Group
ePrint ID: 394037
Date :
Date Event
11 July 2015Accepted/In Press
18 July 2015e-pub ahead of print
3 August 2015Published
Date Deposited: 11 May 2016 08:29
Last Modified: 09 Jun 2017 10:32
Further Information:Google Scholar

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