EGU2020-8621
https://doi.org/10.5194/egusphere-egu2020-8621
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Multi-point observations of a reconnection outflow associated with interacting flux ropes in the solar wind

Zoltan Vörös1,2, Emiliya Yordanova3, Owen Roberts1, and Yasuhito Narita1
Zoltan Vörös et al.
  • 1Space Research Institute, Graz, Austria (zoltan.voeroes@oeaw.ac.at)
  • 2CSFK Geodetic and Geophysical Institute, Sopron, Hungary
  • 3Swedish Institute of Space Physics

Twisted magnetic flux ropes embedded in an interplanetary coronal mass ejection (ICME) often contain oppositely oriented magnetic fields and potentially reconnecting current sheets. Reconnection outflows in the solar wind can be identified through magnetic field and plasma signatures, for example, through decreasing magnetic field magnitude, enhanced bulk velocity, temperature and (anti)correlated rotations of the magnetic field and plasma velocity. We investigate a reconnection outflow observed by ACE, WIND and Geotail spacecraft within the interaction region of two flux ropes embedded into an ICME. The SOHO spacecraft, located 15 RE upstream, 120 RE in GSE Y and 5 RE in GSE Z direction from the ACE spacecraft, does not see any plasma signatures of the reconnection outflow. At the same time the other spacecraft, also separated by more than 200 RE in X and Y GSE directions, observe strong plasma and magnetic field fluctuations at the border of the exhaust.  The fluctuations could be associated with Kelvin-Helmholtz (KH) instability at the border of the reconnection outflow with strong flow shear.  It is speculated that the KH instability driven fluctuations and dissipation is responsible for stopping the reconnection outflow which is therefore not seen by SOHO.

How to cite: Vörös, Z., Yordanova, E., Roberts, O., and Narita, Y.: Multi-point observations of a reconnection outflow associated with interacting flux ropes in the solar wind, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-8621, https://doi.org/10.5194/egusphere-egu2020-8621, 2020

Corresponding displays formerly uploaded have been withdrawn.