Japan Geoscience Union Meeting 2023

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[E] Online Poster

P (Space and Planetary Sciences ) » P-PS Planetary Sciences

[P-PS05] Mars and martian moons

Tue. May 23, 2023 3:30 PM - 5:00 PM Online Poster Zoom Room (1) (Online Poster)

convener:Hideaki Miyamoto(University of Tokyo), Takeshi Imamura(Graduate School of Frontier Sciences, The University of Tokyo), Tomoki Nakamura(Department of Earth and Planetary Materials Sciences, Faculty of Science, Tohoku University), Hidenori Genda(Earth-Life Science Institute, Tokyo Institute of Technology)

On-site poster schedule(2023/5/23 17:15-18:45)

3:30 PM - 5:00 PM

[PPS05-P15] The Esw asymmetry and the magnetic morphology of the Martian magnetotail

*LiHui Chai1 (1.Institute of Geology and Geophysics, Chinese Academy of Sciences)

Keywords:Mars, magnetotail, ion pickup

Due to that the gyroradius of the planetary heavy ions picked up by the solar wind electric field (Esw) is comparable to the planet size, the morphology and strength of the induced magnetosphere on Mars are asymmetric in the Esw direction. Based on the statistical analysis of the observations by Mars Atmosphere and Volatile EvolutioN (MAVEN) mission, the morphology of the Martian magnetotail are studied. We found that there are more lobe magnetic fluxes in the +ESW hemispheres than that in the -ESW hemispheres in the near magnetotail on Mars. The lobe magnetic flux transports gradually towards the -ESW hemispheres along the magnetotail. The regions with more/less lobe magnetic fluxes coincide with the regions with draped/reversed magnetic field and fast-but-sparse/slow-but-dense escaping ions, respectively. The cause of the magnetic flux inhomogeneity and transport is discussed.