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Charge exchange in cometary coma: Discovery of H− ions in the solar wind close to comet 67P/Churyumov-Gerasimenko
Burch, J. L. Cravens, Thomas Edward Llera, K. Goldstein, R. Mokashi, P. Tzou, C.-Y Broiles, T.
Burch, J. L.
Cravens, Thomas Edward
Llera, K.
Goldstein, R.
Mokashi, P.
Tzou, C.-Y
Broiles, T.
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Abstract
As Rosetta was orbiting comet 67P/Churyumov-Gerasimenko, the Ion and Electron Sensor detected negative particles with angular distributions like those of the concurrently measured solar wind protons but with fluxes of only about 10% of the proton fluxes and energies of about 90% of the proton energies. Using well-known cross sections and energy-loss data, it is determined that the fluxes and energies of the negative particles are consistent with the production of H− ions in the solar wind by double charge exchange with molecules in the coma.
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Date
2016-07-14
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Publisher
AGU
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Research Projects
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Keywords
Comet, Solar Wind, Charge Exchange
Citation
Burch, J. L., Cravens, T. E., Llera, K., Goldstein, R., Mokashi, P., Tzou, C.-Y., & Broiles, T. (2015). Charge exchange in cometary coma: Discovery of H−ions in the solar wind close to comet 67P/Churyumov-Gerasimenko. Geophysical Research Letters, 42(13), 5125–5131. doi:10.1002/2015gl064504