A comparison between the two lobes of comet 67P / Churyumov-Gerasimenko based on D/H ratios in H₂O measured with the Rosetta / ROSINA DFMS

Isaac R.H.G., Schroeder I; Altwegg, Kathrin; Balsiger, Hans; Berthelier, Jean-Jacques; Combi, Michael; De Keyser, Johan; Fiethe, Björn; Fuselier, Stephen; Gombosi, Tamas; Hansen, Kenneth; Rubin, Martin; Shou, Yinsi; Tenishev, Valeriy; Sémon, Thierry; Wampfler, Susanne; Wurz, Peter (2019). A comparison between the two lobes of comet 67P / Churyumov-Gerasimenko based on D/H ratios in H₂O measured with the Rosetta / ROSINA DFMS (Submitted). Monthly notices of the Royal Astronomical Society Oxford University Press 10.1093/mnras/stz2482

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The nucleus of the Jupiter-family comet 67P / Churyumov-Gerasimenko was discovered to be bi-lobate in shape when the European Space Agency spacecraft Rosetta first approached it in July 2014. The bi-lobate structure of the cometary nucleus has led to much discussion regarding the possible manner of its formation and on how the composition of each lobe might compare with that of the other. During its two-year-long mission from 2014 to 2016, Rosetta remained in close proximity to 67P / Churyumov-Gerasimenko, studying its coma and nucleus in situ. Based on lobe-specific measurements of HDO and H₂O performed with the ROSINA DFMS mass spectrometer on board Rosetta, the Deuterium-to-Hydrogen ratios in water from the two lobes could be compared. No appreciable difference was observed, suggesting that both lobes formed in the same region and are homogeneous in their Deuterium-to-Hydrogen ratios.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences
10 Strategic Research Centers > Center for Space and Habitability (CSH)

UniBE Contributor:

Isaac R.H.G., Schroeder I; Altwegg, Kathrin; Balsiger, Hans; Rubin, Martin; Sémon, Thierry; Wampfler, Susanne and Wurz, Peter

Subjects:

500 Science > 520 Astronomy
500 Science > 530 Physics

ISSN:

0035-8711

Publisher:

Oxford University Press

Funders:

[UNSPECIFIED] Canton of Bern
[4] Swiss National Science Foundation
[UNSPECIFIED] ESA PRODEX
Organisations 1496541 not found.
Organisations 90020 not found.
Organisations 0 not found.

Language:

English

Submitter:

Schroeder I Isaac R.H.G.

Date Deposited:

22 Jul 2019 12:40

Last Modified:

05 Sep 2019 07:29

Publisher DOI:

10.1093/mnras/stz2482

ArXiv ID:

1907.06888

Uncontrolled Keywords:

Comets, 67P

BORIS DOI:

10.7892/boris.132006

URI:

https://boris.unibe.ch/id/eprint/132006

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