Chlorine-bearing species and the 37Cl/35Cl isotope ratio in the coma of comet 67P/Churyumov-Gerasimenko

Dhooghe, Frederik; De Keyser, Johan; Hänni, Nora; Altwegg, Kathrin; Cessateur, Gaël; Jehin, Emmanuel; Maggiolo, Romain; Rubin, Martin; Wurz, Peter (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), pp. 1020-1032. Oxford University Press 10.1093/mnras/stab1732

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A full-mission analysis has been conducted of Cl-bearing species in the coma of comet 67P/Churyumov-Gerasimenko as detected by the Rosetta ROSINA/DFMS mass spectrometer. 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 semi-volatile species is unknown at this time.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences
08 Faculty of Science > Other Institutions > Emeriti, Faculty of Science
08 Faculty of Science > Physics Institute

UniBE Contributor:

Hänni, Nora Phillys, Altwegg, Kathrin, Rubin, Martin, Wurz, Peter

Subjects:

500 Science > 520 Astronomy
600 Technology > 620 Engineering
500 Science > 530 Physics

ISSN:

0035-8711

Publisher:

Oxford University Press

Language:

English

Submitter:

Dora Ursula Zimmerer

Date Deposited:

09 Sep 2021 10:43

Last Modified:

05 Dec 2022 15:52

Publisher DOI:

10.1093/mnras/stab1732

BORIS DOI:

10.48350/158333

URI:

https://boris.unibe.ch/id/eprint/158333

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