BepiColombo observations of cold oxygen and carbon ions in the flank of the induced magnetosphere of Venus. Hadid, L. Z., Delcourt, D., Saito, Y., Fränz, M., Yokota, S., Fiethe, B., Verdeil, C., Katra, B., Leblanc, F., Fischer, H., Persson, M., Aizawa, S., André, N., Harada, Y., Fedorov, A., Fontaine, D., Krupp, N., Michalik, H., Berthelier, J., Krüger, H., Murakami, G., Matsuda, S., Heyner, D., Auster, H., Richter, I., Mieth, J. Z. D., Schmid, D., & Fischer, D. Nature Astronomy, 8(6):716–724, April, 2024.
BepiColombo observations of cold oxygen and carbon ions in the flank of the induced magnetosphere of Venus [link]Paper  doi  abstract   bibtex   
Abstract On 10 August 2021, the Mercury-bound BepiColombo spacecraft performed its second fly-by of Venus and provided a short-lived observation of its induced magnetosphere. Here we report results recorded by the Mass Spectrum Analyzer on board Mio, which reveal the presence of cold O + and C + with an average total flux of ~4 ± 1 × 10 4  cm −2  s −1 at a distance of about six planetary radii in a region that has never been explored before. The ratio of escaping C + to O + is at most 0.31 ± 0.2, implying that, in addition to atomic O + ions, CO group ions or water group ions may be a source of the observed O + . Simultaneous magnetometer observations suggest that these planetary ions were in the magnetosheath flank in the vicinity of the magnetic pileup boundary downstream. These results have important implications regarding the evolution of Venus’s atmosphere and, in particular, the evolution of water on the surface of the planet.
@article{hadid_bepicolombo_2024,
	title = {{BepiColombo} observations of cold oxygen and carbon ions in the flank of the induced magnetosphere of {Venus}},
	volume = {8},
	issn = {2397-3366},
	url = {https://www.nature.com/articles/s41550-024-02247-2},
	doi = {10.1038/s41550-024-02247-2},
	abstract = {Abstract 
             
              On 10 August 2021, the Mercury-bound BepiColombo spacecraft performed its second fly-by of Venus and provided a short-lived observation of its induced magnetosphere. Here we report results recorded by the Mass Spectrum Analyzer on board Mio, which reveal the presence of cold O 
              + 
              and C 
              + 
              with an average total flux of {\textasciitilde}4 ± 1 × 10 
              4 
               cm 
              −2 
               s 
              −1 
              at a distance of about six planetary radii in a region that has never been explored before. The ratio of escaping C 
              + 
              to O 
              + 
              is at most 0.31 ± 0.2, implying that, in addition to atomic O 
              + 
              ions, CO group ions or water group ions may be a source of the observed O 
              + 
              . Simultaneous magnetometer observations suggest that these planetary ions were in the magnetosheath flank in the vicinity of the magnetic pileup boundary downstream. These results have important implications regarding the evolution of Venus’s atmosphere and, in particular, the evolution of water on the surface of the planet.},
	language = {en},
	number = {6},
	urldate = {2024-08-30},
	journal = {Nature Astronomy},
	author = {Hadid, L. Z. and Delcourt, D. and Saito, Y. and Fränz, M. and Yokota, S. and Fiethe, B. and Verdeil, C. and Katra, B. and Leblanc, F. and Fischer, H. and Persson, M. and Aizawa, S. and André, N. and Harada, Y. and Fedorov, A. and Fontaine, D. and Krupp, N. and Michalik, H. and Berthelier, J-J. and Krüger, H. and Murakami, G. and Matsuda, S. and Heyner, D. and Auster, H.-U. and Richter, I. and Mieth, J. Z. D. and Schmid, D. and Fischer, D.},
	month = apr,
	year = {2024},
	pages = {716--724},
}
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