First ENA observations at Mars: Charge exchange ENAs produced in the magnetosheath

Gunell, H.; Brinkfeldt, K.; Holmström, M.; Brandt, P. C:son; Barabash, S.; Kallio, E.; Ekenbäck, A.; Futaana, Y.; Lundin, R.; Andersson, H.; Yamauchi, M.; Grigoriev, A.; Winningham, J.D.; Frahm, R.A.; Sharber, J.R.; Scherrer, J.R.; Coates, A.J.; Linder, D.R.; Kataria, D.O.; Säles, T.; Riihelä, P.; Schmidt, W.; Koskinen, H.; Kozyra, J.; Luhmann, J.; Roelof, E.; Williams, D.; Livi, S.; Curtis, C.C.; Hsieh, K.C.; Sandel, B.R.; Grande, M.; Carter, M.; Sauvaud, J.-A.; Fedorov, A.; Thocaven, J.-J.; McKenna-Lawler, Susan; Orsini, S.; Cerulli-Irelli, R.; Maggi, M.; Wurz, P.; Bochsler, P.; Krupp, N.; Woch, J.; Fränz, M.; Asamura, K.; Dierker, C.

First ENA observations at Mars: Charge exchange ENAs produced in the magnetosheath

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Gunell, H., Brinkfeldt, K., Holmström, M., Brandt, P. C:son, Barabash, S., Kallio, E., Ekenbäck, A., Futaana, Y., Lundin, R., Andersson, H., Yamauchi, M., Grigoriev, A., Winningham, J.D., Frahm, R.A., Sharber, J.R., Scherrer, J.R., Coates, A.J., Linder, D.R., Kataria, D.O., Säles, T., Riihelä, P., Schmidt, W., Koskinen, H., Kozyra, J., Luhmann, J., Roelof, E., Williams, D., Livi, S., Curtis, C.C., Hsieh, K.C., Sandel, B.R., Grande, M., Carter, M., Sauvaud, J.-A., Fedorov, A., Thocaven, J.-J., McKenna-Lawler, Susan, Orsini, S., Cerulli-Irelli, R., Maggi, M., Wurz, P., Bochsler, P., Krupp, N., Woch, J., Fränz, M., Asamura, K. and Dierker, C. (2006) First ENA observations at Mars: Charge exchange ENAs produced in the magnetosheath. Icarus, 182 (2). pp. 431-438. ISSN 00191035

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Abstract

Measurements of energetic neutral atoms (ENA) generated in the magnetosheath at Mars are reported. These ENAs are the result of charge exchange collisions between solar wind protons and neutral oxygen and hydrogen in the exosphere of Mars. The peak of the observed ENA flux is 1.3 × 1011 m−2 sr−1 s−1. For the case studied here, i.e., the passage of Mars Express through the martian magnetosheath around 20:15 UT on 3 May 2004, the measurements agree with an analytical model of the ENA production at the planet. It is possible to find parameter values in the model such that the observed peak in the ENA count rate during the spacecraft passage through the magnetosheath is reproduced

Item Type:	Article
Keywords:	Mars; Solar wind; Magnetospheres;
Academic Unit:	Faculty of Science and Engineering > Experimental Physics
Item ID:	20902
Identification Number:	10.1016/j.icarus.2005.10.027
Depositing User:	IR Editor
Date Deposited:	09 Dec 2025 15:40
Journal or Publication Title:	Icarus
Publisher:	Elsevier
Refereed:	Yes
Related URLs:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

MURAL - Maynooth University Research Archive Library

First ENA observations at Mars: Charge exchange ENAs produced in the magnetosheath

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