Fedorov, A and Ferrier, C and Sauvaud, JA and Barabash, S and Zhang, TL and Mazelle, C and Lundin, R and Gunell, H and Andersson, H and Brinkfeldt, K and Futaana, Y and Grigoriev, A and Holmstrom, M and Yamauchi, M and Asamura, K and Baumjohann, W and Lammer, H and Coates, AJ and Kataria, DO and Linder, DR and Curtis, CC and Hsieh, KC and Sandel, BR and Thocaven, JJ and Grande, M and Koskinen, H and Kallio, E and Sales, T and Schmidt, W and Riihela, P and Kozyra, J and Krupp, N and Woch, J and Luhmann, J and McKenna-Lawlor, S and Orsini, S and Cerulli-Irelli, R and Mura, A and Milillo, A and Maggi, M and Roelof, E and Brandt, P and Russell, CT and Szego, K and Winningham, JD and Frahm, RA and Scherrer, J and Sharber, JR and Wurz, P and Bochsler, P (2008) Comparative analysis of Venus and Mars magnetotails. PLANET SPACE SCI , 56 (6) 812 - 817. 10.1016/j.pss.2007.12.012.
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We have an unique opportunity to compare the magnetospheres of two non-magnetic planets as Mars and Venus with identical instrument sets Aspera-3 and Aspera-4 on board of the Mars Express and Venus Express missions. We have performed both statistical and case studies of properties of the magnetosheath ion flows and the flows of planetary ions behind both planets. We have shown that the general morphology of both magnetotails is generally identical. In both cases the energy of the light (H+) and the heavy (O+, etc.) ions decreases from the tail periphery (several keV) down to few eV in the tail center. At the same time the wake center of both planets is occupied by plasma sheet coincident with the current sheet of the tail. Both plasma sheets are filled by accelerated (500-1000 eV) heavy planetary ions. We report also the discovery of a new feature never observed before in the tails of non-magnetic planets: the plasma sheet is enveloped by consecutive layers of He+ and H+ with decreasing energies. (c) 2007 Elsevier Ltd. All rights reserved.
|Title:||Comparative analysis of Venus and Mars magnetotails|
|Keywords:||Mars, Venus, magnetotail, magnetosphere, MAGNETOSPHERE, FIELDS|
|UCL classification:||UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Space and Climate Physics|
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