Abstract
Atmospheric photoelectrons have been observed well above the ionosphere of Mars by the ASPERA-3 ELS instrument on Mars Express. To systematically interpret these observations, field lines from two global MHD simulations were analyzed for connectivity to the dayside ionosphere (allowing photoelectron escape). It is found that there is a hollow cylinder behind the planet from 1–2 R M away from the Mars-Sun line that has a high probability of containing magnetic field lines with connectivity to the dayside ionosphere. These results are in complete agreement with the ELS statistics. It is concluded that the high-altitude photoelectrons are the result of direct magnetic connectivity to the dayside at the moment of the measurement, and no extra trapping or bouncing mechanisms are needed to explain the data.
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Acuña, M. H., et al.: 1998, Science 279, 1676.
Arkani-Hamed, J.: 2001, J. Geophys. Res. 106, 23,197.
Arkani-Hamed, J.: 2002, J. Geophys. Res. 107(E10), 5083, doi: 10.1029/2001JE001835.
Barabash, S., et al.: 2004, in Wilson, A. (ed.), Mars Express: The Scientific Payload, European Space Agency Publications Division, European Space Research and Technology Centre, Noordwijk, The Netherlands, SP-1240, p. 121.
Chicarro, A., Martin, P., and Trautner, R.: 2004, in Wilson, A. (ed.), Mars Express: The Scientific Payload, European Space Agency Publications Division, European Space Research and Technology Centre, Noordwijk, The Netherlands, SP-1240, p. 3.
Connerney, J. E. P., Acuña, M. H., Wasilewski, P. J., Kleteschka, G., Ness, N. F., Rème, H., et al.: 2001, Geophys. Res. Lett. 28, 4015.
Crider, D. H., et al.: 2002, Geophys. Res. Lett. 29(8), 1170, doi: 10.1029/2001GL013860.
Frahm, R. A., et al.: 2006, Icarus, in press.
Frahm. R., et al.: Space Sci. Rev., this issue, doi: 10.1007/s11214-006-9119-5.
Hanson, W. B., Sanatani, S., and Zuccaro, D. R.: 1977, J. Geophys. Res. 82, 4351.
Khazanov, G. V., and Liemohn, M. W.: 1995, J. Geophys. Res. 100, 9669.
Khazanov, G. V., Liemohn, M. W., Kozyra, J. U., and Moore, T. E.: 1998, J. Geophys. Res. 103, 23, 485.
Khazanov, G. V., Liemohn, M. W., Kozyra, J. U., and Gallagher, D. L.: 2000, J. Atmos. Solar-Terr. Physics 62, 947.
Lejeune, J., and Wörmser, F.: 1992, J. Geophys. Res. 97, 159.
Liemohn, M. W., et al.: 2006, Icarus 182, 383.
Luhmann, J. G., and Brace, L. H.: 1991, Rev. Geophys. 29, 121.
Ma, Y., Nagy, A. F., Hansen, K. C., DeZeeuw, D. L., and Gombosi, T. I.: 2002, J. Geophys. Res. 107(A10), 1282, doi: 10.1029/2002JA009293.
Ma, Y., Nagy, A. F., Sokolov, I. V., and Hansen, K. C.: 2004, J. Geophys. Res. 109, A07211, doi: 10.1029/2003JA010367.
Mitchell, D. L., et al.: 2001, J. Geophys. Res. 106(E10), 23,419.
Nagy, A. F., and Banks, P. M.: 1970, J. Geophys. Res. 75, 6260.
Powell, K. G., Roe, P. L., Linde, T. J., Gombosi, T. I., and De Zeeuw, D. L.: 1999, J. Comp. Phys. 153, 284.
Schunk, R. M., and Nagy, A. F.: 2000, Ionospheres, Cambridge University Press, New York.
Swartz, W. E., Bailey, G. J., and Moffett, R. J.: 1975, Planet. Space Sci. 23, 589.
Vennerstrom, S., Olsen, N., Purucker, M., Acuña, M. H., and Cain, J. C.: 2003, Geophys. Res. Lett. 30(7), 1369, doi: 10.1029/ 2003GL016883.
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Liemohn, M.W., Ma, Y., Frahm, R.A. et al. Mars Global MHD Predictions of Magnetic Connectivity Between the Dayside Ionosphere and the Magnetospheric Flanks. Space Sci Rev 126, 63–76 (2006). https://doi.org/10.1007/s11214-006-9116-8
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DOI: https://doi.org/10.1007/s11214-006-9116-8