Model of Martian Crustal Magnetic Field Based on Equivalent Currents

Article Preview

Abstract:

The UV spectrograph Spectroscopy for the Investigation of Characteristics of the atmosphere of Mars (SPICAM) on board Mars Express made the first observation of auroral-type emission in the cusp region of strong crustal magnetic field on Mars and found that the arc of Martian aurora is very narrow in width, which obviously differs from that of other planets. Based on the observation, we put forward a model of crustal magnetic field on Martian aurora zone through the morphology of Martian aurora. In the model, equivalent currents are proposed, the topology and magnitude of magnetic field generated by these equivalent currents is consistent with that of crustal magnetic field on Martian aurora zone. The morphology of Martian aurora generated through the model matches well with the observations by the Mars Express orbiter.

You might also be interested in these eBooks

Info:

Periodical:

Pages:

550-554

Citation:

Online since:

October 2013

Authors:

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2013 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] C.E. Mcllwain, Direct measurement of particles producing visible auroras, J. Geophys. Res, 1960, 65(14): 2727-2747.

DOI: 10.1029/jz065i009p02727

Google Scholar

[2] J.L. Bertaux, F. Leblanc, O. Witasse, etal, Discovery of an aurora on Mars, Nature, 2005, 435: 790-794.

DOI: 10.1038/nature03603

Google Scholar

[3] F. Leblanc, O. Witasse, J. Winningham, etal, Origins of the Martian aurora observed by Spectroscopy for Investigation of Characteristics of the Atmosphere of Mars (SPICAM) on board Mars Express, J. Geophys. Res, 2006, 111(A09313), doi: 10. 1029/2006JA011763.

DOI: 10.1029/2006ja011763

Google Scholar

[4] F. Leblanc, O. Witasse, L. Lilensten, etal, Observations of aurorae by SPICAM ultraviolet spectrograph on board Mars Express: Simultaneous ASPERA-3 and MARSIS measurements, J. Geophys. Res, 2008, 113(A08311), doi: 10. 1029/2008JA013033.

DOI: 10.1029/2008ja013033

Google Scholar

[5] D. A. Brain, J. S. Halekas, L. M. Peticolas etal, On the origin of aurorae on Mars, Geophys. Res. Lett, 2006, 33(L01201), doi: 10. 1029/2005GL024782.

Google Scholar

[6] M. H. Acuna, J. E. P. Connerney, N. F. Ness, etal, Global distribution of crustal magnetization discovered by the Mars Global Surveyor MAG/ER experiment, Science, 1999, 284: 790-793.

DOI: 10.1126/science.284.5415.790

Google Scholar

[7] Y. J. Ma, A. F. Nagy, K. C. Hansen, etal, Three-dimensional multispecies MHD studies of the solar wind interaction with Mars in the presence of crustal fields, J. Geophys. Res, 2002, 107(A101282), doi: 10. 1029/2002JA009293.

DOI: 10.1029/2002ja009293

Google Scholar