Magnetic Field Draping in Induced Magnetospheres: Evidence From the MAVEN Mission to Mars

Author:

Azari A. R.1ORCID,Abrahams E.2,Sapienza F.2ORCID,Mitchell D. L.1,Biersteker J.3ORCID,Xu S.1ORCID,Bowers C.4ORCID,Pérez F.2ORCID,DiBraccio G. A.5ORCID,Dong Y.6ORCID,Curry S.1ORCID

Affiliation:

1. Space Sciences Laboratory University of California, Berkeley Berkeley CA USA

2. University of California, Berkeley Berkeley CA USA

3. Massachusetts Institute of Technology Cambridge MA USA

4. University of Michigan Ann Arbor MI USA

5. NASA Goddard Space Flight Center Greenbelt MD USA

6. Laboratory for Atmospheric and Space Physics University of Colorado, Boulder Boulder CO USA

Abstract

AbstractThe Mars Atmosphere and Volatile EvolutioN (MAVEN) mission has been orbiting Mars since 2014 and now has over 10,000 orbits which we use to characterize Mars' dynamic space environment. Through global field line tracing with MAVEN magnetic field data we find an altitude dependent draping morphology that differs from expectations of induced magnetospheres in the vertical ( Mars Sun‐state, MSO) direction. We quantify this difference from the classical picture of induced magnetospheres with a Bayesian multiple linear regression model to predict the draped field as a function of the upstream interplanetary magnetic field (IMF), remanent crustal fields, and a previously underestimated induced effect. From our model we conclude that unexpected twists in high altitude dayside draping (>800 km) are a result of the IMF component in the MSO direction. We propose that this is a natural outcome of current theories of induced magnetospheres but has been underestimated due to approximations of the IMF as solely directed. We additionally estimate that distortions in low altitude (<800 km) dayside draping along are directly related to remanent crustal fields. We show dayside draping traces down tail and previously reported inner magnetotail twists are likely caused by the crustal field of Mars, while the outer tail morphology is governed by an induced response to the IMF direction. We conclude with an updated understanding of induced magnetospheres which details dayside draping for multiple directions of the incoming IMF and discuss the repercussions of this draping for magnetotail morphology.

Funder

NASA Headquarters

National Science Foundation

National Aeronautics and Space Administration

Publisher

American Geophysical Union (AGU)

Subject

Space and Planetary Science,Geophysics

Cited by 4 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Modeling Ion Transport in the Upper Ionosphere of Mars: Exploring the Effect of Crustal Magnetic Fields;Journal of Geophysical Research: Space Physics;2024-07-30

2. A Virtual Solar Wind Monitor at Mars With Uncertainty Quantification Using Gaussian Processes;Journal of Geophysical Research: Machine Learning and Computation;2024-07-11

3. Sinuous Aurora at Mars: A Link to the Tail Current Sheet?;Journal of Geophysical Research: Space Physics;2024-06

4. The Day the Solar Wind Disappeared at Mars;Journal of Geophysical Research: Space Physics;2023-12

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