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• W2108215512 abstract "<i>Context. <i/>Meteoroid impacts are an important source of neutral atoms in the exosphere of Mercury. Impacting particles of size smaller than 1 cm have been proposed to be the major contribution to exospheric gases. However, our knowledge of the fluxes and impact velocities of different sizes is based on old extrapolations of similar quantities on Earth.<i>Aims. <i/>We compute by means of <i>N<i/>-body numerical integrations the orbital evolution of a large number of dust particles supposedly produced in the Main Belt. They migrate inward under the effect of drag forces until they encounter a terrestrial planet or eventually fall into the Sun. From our numerical simulations, we compute the flux of particles hitting Mercury's surface and the corresponding distribution of impact velocities.<i>Methods. <i/>The orbital evolution of dust particles of different sizes is computed with a numerical code based on a physical model developed previously by Marzari & Vanzani (1994, A&A, 283, 275). It includes the effects of Poynting-Robertson drag, solar wind drag, and planetary perturbations. A precise calibration of the particle flux on Mercury has been performed by comparing our model predictions for dust infall on to Earth with observational data.<i>Results. <i/>We provide predictions of the flux to different size particles impacting Mercury and their collisional velocity distribution. We compare our results with previous estimates and we find that these collisional velocities are lower but that the fluxes are significantly higher." @default.
• W2108215512 created "2016-06-24" @default.
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• W2108215512 date "2009-07-02" @default.
• W2108215512 modified "2023-10-13" @default.
• W2108215512 title "Statistical analysis of micrometeoroids flux on Mercury" @default.
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• W2108215512 doi "https://doi.org/10.1051/0004-6361/200912080" @default.
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