Martian Charge-exchange Induced X-rays

International audienceWe study the EUV/soft X-ray emission induced by charge transfer between solar wind highly charged ions and neutral H and O of the Martian exosphere. Results are obtained using three-dimensional hybrid simulations of the global plasma environment of Mars, including photoionization and electron impact ionization of neutral H and O coronae. We calculate projected emission maps from different vantage points and show how X-ray emission localization traces the Martian shock and magnetic barrier structures. We also compare the different heavy ion contributions to the emission, as well as the secondary charge exchange component