The Space Environment of Mercury at the Time of the Third MESSENGER Flyby: Solar Wind and IMF Modeling of Upstream Conditions

Details The Space Environment of Mercury at the Time of the Third MESSENGER Flyby: Solar Wind and IMF Modeling of Upstream Conditions The Space Environment of Mercury at the Time of the Third MESSENGER Flyby: Solar Wind and IMF Modeling of Upstream Conditions

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufm.p24a..02o&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #P24A-02

Physics

[2134] Interplanetary Physics / Interplanetary Magnetic Fields, [2164] Interplanetary Physics / Solar Wind Plasma, [7924] Space Weather / Forecasting, [7959] Space Weather / Models

Scientific paper

The third flyby of Mercury by the MESSENGER spacecraft occurred on 29 September 2009. In order to provide contextual information about the solar wind properties and the interplanetary magnetic field (IMF) near the planet, we have used an empirical modeling technique combined with a numerical-physics-based solar wind model. The Wang-Sheeley-Arge (WSA) method uses solar photospheric magnetic field observations (from Earth-based instruments) to estimate inner heliospheric conditions out to 21.5 solar radii from the Sun. This information is then used as input to the global numerical magnetohydrodynamic model, ENLIL, which calculates solar wind velocity, density, temperature, and magnetic field strength and polarity throughout the inner heliosphere. WSA-ENLIL calculations for the several-week period encompassing MESSENGER’s third Mercury flyby provide a critical context for understanding flyby observations and global magnetospheric modeling results.

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