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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Comparative study of three reconnection X line models at the Earth's dayside magnetopause using in situ observations

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Souza, V. M. ; Gonzalez, W. D. ; Sibeck, D. G. ; Koga, D. ; Walsh, B. M. ; Mendes, O.
Total Authors: 6
Document type: Journal article
Source: JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS; v. 122, n. 4, p. 4228-4250, APR 2017.
Web of Science Citations: 4

This work examines the large-scale aspects of magnetic field reconnection at the Earth's dayside magnetopause. We use two sets of reconnection events, which are identified mostly by the in situ detection of accelerated and Alfvenic plasma flows. We intercompare three analytical models that predict the reconnection X line location and orientation, namely, the Trattner et al. (2007) and Swisdak and Drake (2007) models and also a modified version of the component merging model. In the first set of reconnection observations, we show three fortuitous, quasi-simultaneous dayside magnetopause crossing events where two widely separated spacecraft detect reconnection signatures, and the X line location and orientation can be inferred from the observations. We compare X line model predictions to those inferred from observations. These three reconnection events indicate the presence of an extended (>7 Earth radii in length), component-type reconnection X line on Earth's dayside magnetopause connecting and structuring the reconnection signatures at locations far apart. In the second set of reconnection events, we analyze the X line models' performance in predicting the observed reconnection outflow direction, i.e., its north-south and/or east-west senses, in a total of 75 single, rather than multiple and quasi-simultaneous, magnetopause crossing events, where reconnection-associated plasma flows were clearly present. We found that the Swisdak and Drake's (2007) X line model performs slightly better, albeit not statistically significant, when predicting both accelerated plasma flow north-south and east-west components in 73% and 53% of the cases, respectively, as compared to the Trattner et al. (2007) model (70% north-south and 42% east-west) and the modified component merging model (66% north-south and 50% east-west). (AU)

FAPESP's process: 15/20104-0 - Numerical and observational approaches of magnetic reconnection at the Earth's MAGNETOPAUSE in light of the magnetospheric multi scale mission
Grantee:Vitor Moura Cardoso e Silva Souza
Support type: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 14/21229-9 - Numerical and observational analysis on the macroscopic aspect of the magnetic reconnection process at Earth's dayside magnetopause
Grantee:Vitor Moura Cardoso e Silva Souza
Support type: Scholarships in Brazil - Post-Doctorate