Recovery Timescales of the Dayside Martian Magnetosphere to IMF Variability

N. Romanelli; G. Dibraccio; Ronan Modolo; François Leblanc; J. Espley; J. Gruesbeck; J. Halekas; J. Mcfadden; B. Jakosky

doi:10.1029/2019GL084151

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Recovery Timescales of the Dayside Martian Magnetosphere to IMF Variability

Journal article

Peer reviewed

Recovery Timescales of the Dayside Martian Magnetosphere to IMF Variability

N. Romanelli, G. Dibraccio, Ronan Modolo, François Leblanc, J. Espley, J. Gruesbeck, J. Halekas, J. Mcfadden and B. Jakosky

Geophysical research letters, Vol.46(20), pp.10977-10986

10/28/2019

DOI: 10.1029/2019GL084151

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Abstract

International audience; In this work we revisit an event observed by Mars Atmosphere and Volatile Evolution MissioN (MAVEN) in the solar wind where the Interplanetary Magnetic Field (IMF) rotates around the Mars‐Sun axis during approximately 6 minutes. Based on a time‐dependent LATMOS Hybrid Simulation, we determine recovery timescales of the dayside Martian magnetosphere normalized by the IMF variability timescale. Particularly, we find that such recovery timescales range between 8 s and 11 min for an ~90° IMF rotation that lasted 50 s (observed as part of the 6 minutes time interval), depending on the considered magnetospheric region. We also find that the O+ plume recovery timescales range between 40 s and 120 s, taking greater values for further downstream distances (at least up to 1 RM downstream from the terminator plane). This range is on the order of the magnetosheath O+ gyroperiod, showing the kinetic nature of the plume recovery process.

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Details

Title: Subtitle: Recovery Timescales of the Dayside Martian Magnetosphere to IMF Variability
Creators: N. Romanelli - Goddard Space Flight Center
G. Dibraccio - Goddard Space Flight Center
Ronan Modolo - Laboratoire atmosphères, milieux, observations spatiales
François Leblanc - Laboratoire atmosphères, milieux, observations spatiales
J. Espley - Goddard Space Flight Center
J. Gruesbeck - Goddard Space Flight Center
J. Halekas - University of Iowa
J. Mcfadden - University of California, Berkeley
B. Jakosky - Laboratory for Atmospheric and Space Physics
Resource Type: Journal article
Publication Details: Geophysical research letters, Vol.46(20), pp.10977-10986
DOI: 10.1029/2019GL084151
ISSN: 0094-8276
eISSN: 1944-8007
Publisher: American Geophysical Union
Language: English
Date published: 10/28/2019
Academic Unit: Physics and Astronomy
Record Identifier: 9984428840002771

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