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Journal of Astrophysics & Aerospace Technology | ISSN: 2329-6542 | Volume 6
Planetary Science and Particle Physics
International Conference on
August 27-28, 2018 | Boston, USA
Numerical analysis of plasma flow vortices in the magneto-tail
Khatuna Chargazia
and
Oleg Kharshiladze
Tbilisi State University, Georgia
U
lf electromagnetic planetarywaves can self-organize into vortex structures (monopole, dipole or into vortex chains).They are often
detected in the plasma media, for instance in the magneto-sheath, in the magneto-tail and in the ionosphere. Large scale vortices
may correspond to the injection scale of turbulence, so that understanding their origin is important for understanding the energy
transfer processes in the geo-space environment. In a recent work, the THEMIS mission has detected vortices in the magneto-tail in
association with the strong velocity shear of a sub-storm plasma flow which have conjugate vortices in the ionosphere. By analysing
the THEMIS data for that event, we find that several vortices can be detected together with the main one, and that the vortices indeed
constitute a vortex chain. The study was carried out by analysing both the velocity and the magnetic field measurements for spacecraft
C and D, and by obtaining the corresponding hodograms. It is found that both monopolar and bipolar vortices may be present in
the magneto-tail. The comparison of observations with numerical simulations of vortex formation in sheared flows is also discussed.
Khatuna.chargazia@gmail.comJ Astrophys Aerospace Technol 2018, Volume 6
DOI: 10.4172/2329-6542-C2-021