Charge exchange in cometary coma: Discovery of H- ions in the solar wind close to comet 67P/Churyumov-Gerasimenko

Burch, J. L.; Cravens, T. E.; Llera, K.; Goldstein, R.; Mokashi, P.; Tzou, Chia-Yu; 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), pp. 5125-5131. American Geophysical Union 10.1002/2015gl064504

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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.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences

UniBE Contributor:

Tzou, Chia-Yu

Subjects:

500 Science > 530 Physics

ISSN:

0094-8276

Publisher:

American Geophysical Union

Language:

English

Submitter:

Katharina Weyeneth-Moser

Date Deposited:

14 Jun 2016 10:13

Last Modified:

14 Jun 2016 10:13

Publisher DOI:

10.1002/2015gl064504

Web of Science ID:

000358691300006

BORIS DOI:

10.7892/boris.81645

URI:

https://boris.unibe.ch/id/eprint/81645

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