Mercury’s atmosphere and magnetosphere: MESSENGER third flyby observations (Invited)

Details Mercury’s atmosphere and magnetosphere: MESSENGER third flyby observations (Invited) Mercury’s atmosphere and magnetosphere: MESSENGER third flyby observations (Invited)

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufm.p24a..01s&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #P24A-01

Physics

[5405] Planetary Sciences: Solid Surface Planets / Atmospheres, [5410] Planetary Sciences: Solid Surface Planets / Composition, [5440] Planetary Sciences: Solid Surface Planets / Magnetic Fields And Magnetism, [5443] Planetary Sciences: Solid Surface Planets / Magnetospheres

Scientific paper

MESSENGER’s third flyby of Mercury en route to orbit insertion about the innermost planet took place on 29 September 2009. The earlier 14 January and 6 October 2008 encounters revealed that Mercury’s magnetic field is highly dipolar and stable over the 35 years since its discovery by Mariner 10; that a structured, temporally variable exosphere extends to great altitudes on the dayside and forms a long tail in the anti-sunward direction; a cloud of planetary ions encompasses the magnetosphere from the dayside bow shock to the downstream magnetosheath and magnetotail; and that the magnetosphere undergoes extremely intense magnetic reconnection in response to variations in the interplanetary magnetic field. Here we report on new results derived from observations from MESSENGER’s Mercury Atmospheric and Surface Composition Spectrometer (MASCS), Magnetometer (MAG), and Energetic Particle and Plasma Spectrometer (EPPS) taken during the third flyby.

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