Physics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufm.p23a0245m&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #P23A-0245
Physics
5421 Interactions With Particles And Fields, 5443 Magnetospheres (2756), 5464 Remote Sensing
Scientific paper
The peculiar configuration of the Hermean magnetosphere may allow a solar wind entrance and circulation in Mercury's environment. Cusp regions are extremely large if compared to the Earth's ones, so that intense ion fluxes can be expected there. The solar wind particles are likely to rapidly leave the Hermean magnetosphere or precipitate onto the surface of the planet, thus originating neutral particle emission via ion-sputtering. The exosphere is also refilled by photon-stimulated and thermal desorption processes (also occurring at the planetary surface), and eroded by photon-ionisation and Jeans escape. In the present study, we reconstruct the global distributions of H, O and Na (both neutral and ionised), taking into account the above-mentioned processes, by means of a single-particle model. 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 modelled distributions here presented may be considered as a reference tool for the future observations.
Lammer Helmut
Milillo Anna
Mura Antonio
Orsini Stefano
Wurs P.
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