Neutral Particle Emission Induced by Solar Wind in Mercury's Environment

Details Neutral Particle Emission Induced by Solar Wind in Mercury's Environment Neutral Particle Emission Induced by Solar Wind in Mercury's Environment

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agusmsa21b..03m&link_type=abstract

American Geophysical Union, Spring Meeting 2004, abstract #SA21B-03

Physics

5443 Magnetospheres (2756), 5462 Polar Regions, 5464 Remote Sensing

Scientific paper

The peculiar configuration of the Hermean magnetosphere, characterised by a weak magnetic field, may allow a solar wind entrance and circulation in Mercury's environment. More particularly, intense ion fluxes are expected in the cusp regions, which are extremely large if compared to the Earth's ones. In the present study we reconstruct the H+ distribution in space, energy and pitch angle by means of a single-particle Monte-Carlo model. The neutral particle emission induced by the solar wind in the Hermean environment is investigated as well. The H+ are likely to rapidly leave the Hermean magnetosphere or precipitate onto the surface of the planet, thus originating neutral particle emission via ion-sputtering as well as energetic neutral atoms, generated via charge-exchange process. Different external configurations of both interplanetary magnetic field and cross-tail potential drop result in variations of the sputtered and charge-exchange neutral particle signal. The Neutral Particle Analyser - Ion Spectrometer experiment (NPA-IS/SERENA), proposed to fly on board of the ESA mission Bepi Colombo, will monitor the circulating ion and neutral particles. The modeled distributions here presented have been processed in the frame of SERENA instrument and may be considered as a reference tool for the future observations.

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