Mechanisms of formation of multiple current sheets in
- Slides: 7
Mechanisms of formation of multiple current sheets in the heliospheric plasma sheet (HPS) Evgeniy Maiewski, Helmi Malova (hmalova@yandex. ru ), Roman Kislov, Victor Popov, Anatoly Petrukovich, and Lev Zelenyi based on “Formation of multiple current sheets in the heliospheric plasma sheet”, Maiewski et al. Cosmic Research, 2020, in press Quiet Sun conditions, solar activity minimum. Streamers, pseudo-streamers, coronal holes (CHs) and neutral lines of the magnetic field (dashed lines) Possible mechanisms of formation of multiple current sheets occurring within the HPS structures in the solar wind are proposed. We suggest that the effect of the multi-layered HPS is determined by the extension of many streamer-beltborne thin current sheets oriented along the neutral line of the interplanetary magnetic field. Within the framework of a proposed MHD model, self-consistent distributions of the key solar wind characteristics which depend on streamer properties are studied. https: //meetingorganizer. copernicus. org/EGU 2020 -3945. html
Possible configurations of streamers creating single or multiple current sheets within the HPS Maiewski et al. Cosmic Research, 2020, in press
Results of MHD modeling Possible Br versus heliolatitude /2 at different distances from the Sun (in solar radii), corresponding to different topologies of magnetic field lines Maiewski et al. Cosmic Research, 2020, in press
Radial component of the electric current Maiewski et al. Cosmic Research, 2020, in press
Plasma density Maiewski et al. Cosmic Research, 2020, in press
Plasma temperature Maiewski et al. Cosmic Research, 2020, in press
Conclusions • The axially symmetric MHD model of the solar wind (SW) is developed. • The distribution of SW characteristics for equatorial streamers with one and three adjacent neutral lines is studied. • It is shown that the streamer belt with three adjacent neutral lines can be elongated in the SW and be supported as stable structures in the modeling area from 20 to 400 Earth’s radii. • Profiles of the radial and azimuthal magnetic components, as well as profiles of current densities tend to be steepened proportionally to the distance from the Sun. Plasma density and temperature for a Sun’s dipole magnetic field have similar profiles characteristic for heliospheric current sheet with a single maximum current density. • To observe the change of magnetic flux at the edges of the streamer, the number of neutral lines within it should be odd.