Energetic neutral atom imaging of comets

Details Energetic neutral atom imaging of comets Energetic neutral atom imaging of comets

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3505103e&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 5, CiteID L05103

Physics

Plasma Physics

1

Planetary Sciences: Comets And Small Bodies: General Or Miscellaneous, Planetary Sciences: Comets And Small Bodies: Interactions With Solar Wind Plasma And Fields, Planetary Sciences: Comets And Small Bodies: Instruments And Techniques, Space Plasma Physics: General Or Miscellaneous, Space Plasma Physics: Mathematical And Numerical Techniques (0500, 3200)

Scientific paper

We present the first computer simulated images of energetic neutral atoms (ENAs) produced by charge exchange between solar wind protons and cometary neutrals. Proton bulk flow and temperature from MHD simulations are used along with a model of cometary neutral densities. The emission of hydrogen ENAs from the comet is then calculated using cross sections for the charge exchange collisions. The ENA production rate is integrated along lines of sight to produce an image of the fluxes. We find detection of hydrogen ENAs feasible and most favorable at solar zenith angles between 80 and 130 degrees.

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