Blar i forfatter "Nilsson, Hans"

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    • Cometary plasma science: Open science questions for future space missions 

      Goetz, Charlotte; Herbert, Gunell; Volwerk, Martin; A., Beth; et al, et al, 12 co-authors; Ericksson, A.; Eriksson, A.; Galand, M; Henri, P.; Nilsson, Hans; Simon Wedlund, Cyril; Alho, A.; Andersson, Laila A.; Andre, Nicolas; de Keyser, Johan; Deca, J.; Mann, Ingrid (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-07)
      Comets hold the key to the understanding of our Solar System, its formation and its evolution, and to the fundamental plasma processes at work both in it and beyond it. A comet nucleus emits gas as it is heated by the sunlight. The gas forms the coma, where it is ionised, becomes a plasma, and eventually interacts with the solar wind. Besides these neutral and ionised gases, the coma also contains ...

    • Energy conversion in cometary atmospheres - Hybrid modeling of 67P/Churyumov-Gerasimenko 

      Lindkvist, Jesper; Hamrin, Maria; Gunell, Herbert; Nilsson, Hans; Wedlund, Cyril Simon; Kallio, Esa; Mann, Ingrid; Pitkänen, Timo; Karlsson, Tomas (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-08-21)
      <i>Aims</i>: We wish to investigate the energy conversion between particles and electromagnetic fields and determine the location where it occurs in the plasma environment of comets.<p> <p><i>Methods</i>: We used a hybrid plasma model that included photoionization, and we considered two cases of the solar extreme ultraviolet flux. Other parameters corresponded to the conditions of comet ...