CHO-Bearing Molecules in Comet 67P/Churyumov-Gerasimenko

Schuhmann, Markus; Altwegg, Kathrin; Balsiger, Hans; Berthelier, Jean-Jacques; De Keyser, Johan; Fuselier, Stephen A.; Gasc, Sébastien; Gombosi, Tamas I.; Hänni, Nora Phillys; Rubin, Martin; Sémon, Thierry; Tzou, Chia-Yu; Wampfler, Susanne (2019). CHO-Bearing Molecules in Comet 67P/Churyumov-Gerasimenko. ACS earth and space chemistry, 3(9), pp. 1854-1861. ACS Publications 10.1021/acsearthspacechem.9b00094

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In 2004, the Rosetta spacecraft was sent to comet 67P/Churyumov-Gerasimenko for the first ever long-term investigation of a comet. After its arrival in 2014, the spacecraft spent more than 2 years in immediate proximity to the comet. During these 2 years, the ROSINA Double Focusing Mass Spectrometer (DFMS) onboard Rosetta discovered a coma with an unexpectedly complex chemical composition that included many oxygenated molecules. Determining the exact cometary composition is an essential first step to understanding of the organic rich chemistry in star forming regions and protoplanetary disks that are ultimately conserved in cometary ices. In this study, a joint approach of laboratory calibration and space data analysis was used to perform a detailed identification and quantification of CHO compounds in the coma of 67P/Churyumov-Gerasimenko. The goal was to derive the CHO compound abundances relative to water for masses up to 100 u. For this study, the May 2015 postequinox period represents the best bulk abundances of comet 67P/Churyumov-Gerasimenko. A wide variety of CHO compounds were discovered, and their bulk abundances were derived. Finally, these results are compared to abundances of CHO-bearing molecules in other comets, obtained mostly from ground-based observations and modeling.

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
10 Strategic Research Centers > Center for Space and Habitability (CSH)

UniBE Contributor:

Schuhmann, Markus; Altwegg, Kathrin; Balsiger, Hans; Gasc, Sébastien; Hänni, Nora Phillys; Rubin, Martin; Sémon, Thierry; Tzou, Chia-Yu and Wampfler, Susanne

Subjects:

500 Science > 520 Astronomy
600 Technology > 620 Engineering

ISSN:

2472-3452

Publisher:

ACS Publications

Language:

English

Submitter:

Dora Ursula Zimmerer

Date Deposited:

02 Sep 2019 10:49

Last Modified:

20 Sep 2019 01:32

Publisher DOI:

10.1021/acsearthspacechem.9b00094

BORIS DOI:

10.7892/boris.132910

URI:

https://boris.unibe.ch/id/eprint/132910

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