Harriet George

Postdoctoral researcher


Curriculum vitae



Laboratory for Atmospheric and Space Physics

University of Colorado Boulder



Quasi‐Parallel Shock Reformation Seen by Magnetospheric Multiscale and Ion‐Kinetic Simulations


Journal article


A. Johlander, M. Battarbee, L. Turc, U. Ganse, Y. Pfau‐Kempf, M. Grandin, J. Suni, V. Tarvus, M. Bussov, Hongyang Zhou, M. Alho, M. Dubart, H. George, Konstantinos E. Papadakis, M. Palmroth
Geophysical Research Letters, 2022

Semantic Scholar DOI PubMedCentral PubMed
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APA   Click to copy
Johlander, A., Battarbee, M., Turc, L., Ganse, U., Pfau‐Kempf, Y., Grandin, M., … Palmroth, M. (2022). Quasi‐Parallel Shock Reformation Seen by Magnetospheric Multiscale and Ion‐Kinetic Simulations. Geophysical Research Letters.


Chicago/Turabian   Click to copy
Johlander, A., M. Battarbee, L. Turc, U. Ganse, Y. Pfau‐Kempf, M. Grandin, J. Suni, et al. “Quasi‐Parallel Shock Reformation Seen by Magnetospheric Multiscale and Ion‐Kinetic Simulations.” Geophysical Research Letters (2022).


MLA   Click to copy
Johlander, A., et al. “Quasi‐Parallel Shock Reformation Seen by Magnetospheric Multiscale and Ion‐Kinetic Simulations.” Geophysical Research Letters, 2022.


BibTeX   Click to copy

@article{a2022a,
  title = {Quasi‐Parallel Shock Reformation Seen by Magnetospheric Multiscale and Ion‐Kinetic Simulations},
  year = {2022},
  journal = {Geophysical Research Letters},
  author = {Johlander, A. and Battarbee, M. and Turc, L. and Ganse, U. and Pfau‐Kempf, Y. and Grandin, M. and Suni, J. and Tarvus, V. and Bussov, M. and Zhou, Hongyang and Alho, M. and Dubart, M. and George, H. and Papadakis, Konstantinos E. and Palmroth, M.}
}

Abstract

Abstract Shock waves in collisionless plasmas are among the most efficient particle accelerators in space. Shock reformation is a process important to plasma heating and acceleration, but direct observations of reformation at quasi‐parallel shocks have been lacking. Here, we investigate Earth's quasi‐parallel bow shock with observations by the four Magnetospheric Multiscale spacecraft. The multi‐spacecraft observations provide evidence of short large‐amplitude magnetic structures (SLAMS) causing reformation of the quasi‐parallel shock. We perform an ion‐kinetic Vlasiator simulation of the bow shock and show that SLAMS reforming the bow shock recreates the multi‐spacecraft measurements. This provides a method for identifying shock reformation in the future.


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