The 2009 Heliosphere Campaign: MESSENGER Data Analysis and Preliminary Results

Details The 2009 Heliosphere Campaign: MESSENGER Data Analysis and Preliminary Results The 2009 Heliosphere Campaign: MESSENGER Data Analysis and Preliminary Results

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh31a1787j&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SH31A-1787

Physics

Plasma Physics

[7509] Solar Physics, Astrophysics, And Astronomy / Corona, [7524] Solar Physics, Astrophysics, And Astronomy / Magnetic Fields, [7537] Solar Physics, Astrophysics, And Astronomy / Solar And Stellar Variability, [7836] Space Plasma Physics / Mhd Waves And Instabilities

Scientific paper

From 2007 to 2009, the Sun experienced its longest solar minimum in a century. Around November 2009, observations were made of this unusually-generated solar wind from 1 to 215 solar radii using the Greenbank Telescope (GBT), Effelsberg Telescope (Eff), the Ootacamund (Ooty) Radio Telescope (ORT), BSA-LPI, and the Solar-Terrestrial Environment Laboratory (STELab) arrays. Each observed a different set of radio sources and/or different frequencies (Table below). GBT measured the Faraday rotation (FR) of the MESSENGER (MESS) radio frequency (RF) signal from 1 to 5.5 solar radii, and Eff measured the scintillation of MESS (5.5 solar radii). We discovered a semi-periodic fluctuation in FR on 08 November around 20 minutes potentially consisting of an MHD wave, and on 10 November, a spatially limited discrete structure was present reversing the FR by 80 degrees. We will discuss our continuing analysis of this unique dataset.The radio antennas deployed for the campaign observations

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