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Title: Generation of Turbulence in Colliding Reconnection Jets

Abstract

The collision of magnetic reconnection jets is reported on by means of a three-dimensional numerical simulation at the kinetic scale, in the presence of a strong guide field. We demonstrate that turbulence develops due to the collision of jets, producing several current sheets in reconnection outflows, aligned with the guide field direction. The turbulence is mainly two-dimensional, with stronger gradients in the plane perpendicular to the guide field and low wave-like activity in the parallel direction. First, we provide a numerical method to isolate the central turbulent region. Second, we analyze the spatial second-order structure function and prove that turbulence is confined in this region. Lastly, we compute local magnetic and electric frequency spectra, finding a trend in the subion range that differs from typical cases for which the Taylor hypothesis is valid, as well as wave activity in the range between ion and electron cyclotron frequencies. Our findings are relevant to understand observed collisions of reconnection jets in space plasmas.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2];  [3]; ORCiD logo [4]; ORCiD logo [1];  [5];  [5]; ORCiD logo [1]
  1. Katholieke Univ. Leuven (Belgium)
  2. Univ. of Delaware, Newark, DE (United States)
  3. Univ. of Calabria, Arcavacata (Italy)
  4. Nanotec-CNR, Arcavacata (Italy)
  5. Univ. of Colorado, Boulder, CO (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Univ. of California, Oakland, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1544069
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
Journal Name: The Astrophysical Journal (Online); Journal Volume: 867; Journal Issue: 1; Journal ID: ISSN 1538-4357
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; magnetic reconnection; methods: numerical; turbulence

Citation Formats

Pucci, Francesco, Matthaeus, William H., Chasapis, A., Servidio, Sergio, Sorriso-Valvo, L., Olshevsky, V., Newman, D. L., Goldman, M. V., and Lapenta, Giovanni. Generation of Turbulence in Colliding Reconnection Jets. United States: N. p., 2018. Web. doi:10.3847/1538-4357/aadd0a.
Pucci, Francesco, Matthaeus, William H., Chasapis, A., Servidio, Sergio, Sorriso-Valvo, L., Olshevsky, V., Newman, D. L., Goldman, M. V., & Lapenta, Giovanni. Generation of Turbulence in Colliding Reconnection Jets. United States. doi:10.3847/1538-4357/aadd0a.
Pucci, Francesco, Matthaeus, William H., Chasapis, A., Servidio, Sergio, Sorriso-Valvo, L., Olshevsky, V., Newman, D. L., Goldman, M. V., and Lapenta, Giovanni. Thu . "Generation of Turbulence in Colliding Reconnection Jets". United States. doi:10.3847/1538-4357/aadd0a. https://www.osti.gov/servlets/purl/1544069.
@article{osti_1544069,
title = {Generation of Turbulence in Colliding Reconnection Jets},
author = {Pucci, Francesco and Matthaeus, William H. and Chasapis, A. and Servidio, Sergio and Sorriso-Valvo, L. and Olshevsky, V. and Newman, D. L. and Goldman, M. V. and Lapenta, Giovanni},
abstractNote = {The collision of magnetic reconnection jets is reported on by means of a three-dimensional numerical simulation at the kinetic scale, in the presence of a strong guide field. We demonstrate that turbulence develops due to the collision of jets, producing several current sheets in reconnection outflows, aligned with the guide field direction. The turbulence is mainly two-dimensional, with stronger gradients in the plane perpendicular to the guide field and low wave-like activity in the parallel direction. First, we provide a numerical method to isolate the central turbulent region. Second, we analyze the spatial second-order structure function and prove that turbulence is confined in this region. Lastly, we compute local magnetic and electric frequency spectra, finding a trend in the subion range that differs from typical cases for which the Taylor hypothesis is valid, as well as wave activity in the range between ion and electron cyclotron frequencies. Our findings are relevant to understand observed collisions of reconnection jets in space plasmas.},
doi = {10.3847/1538-4357/aadd0a},
journal = {The Astrophysical Journal (Online)},
number = 1,
volume = 867,
place = {United States},
year = {2018},
month = {10}
}

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