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Chlorine-bearing species and the 37Cl/35Cl isotope ratio in the coma of comet 67P/Churyumov-Gerasimenko
Dhooghe, F.; De Keyser, J.; Hänni, N.; Altwegg, K.; Cessateur, G.; Jehin, E.; Maggiolo, R.; Rubin, M.; Wurz, P. (2021). Chlorine-bearing species and the 37Cl/35Cl isotope ratio in the coma of comet 67P/Churyumov-Gerasimenko. Monthly Notices of the Royal Astronomical Society 508(1): 1020-1032. https://dx.doi.org/10.1093/mnras/stab1732
In: Monthly Notices of the Royal Astronomical Society. OXFORD UNIV PRESS: Oxford. ISSN 0035-8711; e-ISSN 1365-2966, meer
Peer reviewed article  
Beschikbaar in  Auteurs 
Author keywords
    comets: general, comets: individual: 67P/Churyumov–Gerasimenko
Auteurs  Top 
  • Dhooghe, F., meer
  • De Keyser, J., meer
  • Hänni, N.
  • Altwegg, K.
  • Cessateur, G., meer
  • Jehin, E., meer
  • Maggiolo, R., meer
  • Rubin, M.
  • Wurz, P.
Abstract
    A full-mission analysis has been conducted of Cl-bearing species in the coma of comet 67P/Churyumov–Gerasimenko as detected by the Double Focusing Mass Spectrometer (DFMS) of Rosetta's ROSINA instrument. The isotope ratio of the two stable chlorine isotopes 37Cl/35Cl is found to be 0.336 ± 0.017, to be compared with the standard mean ocean chloride value of 0.320. The isotope ratio does not change appreciably throughout the mission. The Cl-bearing species fingerprint in DFMS indicates that there is at least one additional chlorine-bearing species in the coma next to HCl, CH3Cl, and NH4Cl. The identity of this volatile or semivolatile species is unknown at this time.
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