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An overview of the measurements made by the COSAC instrument at comet 67/P Churyumov-Gerasimenko

Goesmann, F. and Bredehöft, J and Cabane, M. and Ehrenfreund, P. and Gautier, T. and Giri, C. and Krüger, H. and McKenna-Lawlor, S. and Meierhenrich, U. and Munoz-Caro, G. and Raulin, F. and Steele, A. and Steininger, H. and Sternberg, R. and Szopa, C. and Thiemann, W. and Ulamec, S. (2015) An overview of the measurements made by the COSAC instrument at comet 67/P Churyumov-Gerasimenko. EGU General Assembly, 12.-17. April 2015, Wien, Austria.

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In this paper data recorded by the Cometary Sampling and Composition experiment (COSAC), a pyrolysis - gas-chromatograph - mass-spectrometer (pyr GC-MS) aboard Philae are presented. After landing in a somewhat non-nominal way on the cometary nucleus of 67/P, Philae carried out its First Science Sequence. As part of these activities COSAC acquired seven mass-spectra in sniffing mode, the first while still flying, the other at the final landing site. In addition, since drilling of a soil sample was attempted at the final site, a combined GC-MS measurement was performed on the sample transferred to COSAC. In the MS measurement made after the first touch- down a wide range of mass peaks was observed. These are ascribed to a variety of organic compounds, quite a few of them oxygen and nitrogen bearing species. However, no sulfur compounds were detected. The following six MS sniffings showed peaks of decreasing signal intensity mostly, but not completely, following the temperature drop pertaining aboard Philae. The results of the GC-MS measurement were, if at all, only marginally different from an empty run performed by COSAC in April 2014 when Rosetta was still far from the comet. The implications of this result namely: (1) was a sample delivered at all? (2) what do the small signals mean?) will each be discussed.

Item URL in elib:https://elib.dlr.de/101098/
Document Type:Conference or Workshop Item (Speech)
Title:An overview of the measurements made by the COSAC instrument at comet 67/P Churyumov-Gerasimenko
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Goesmann, F.Max-Planck-Institute for Solar System Research, GöttingenUNSPECIFIED
Bredehöft, JPhysics and Astronomy, Open University, Milton KeynesUNSPECIFIED
Cabane, M.Université Pierre et Marie Curie-Paris6, Service d’Aéronomie, Paris, FranceUNSPECIFIED
Ehrenfreund, P.George Washington Unviersity, USAUNSPECIFIED
Gautier, T.Goddard Space Flight Center, Greenbelt, USAUNSPECIFIED
Giri, C.Max-Planck-Institute for Solar System Research, Göttingen & University of Nice, Nice, FranceUNSPECIFIED
Krüger, H.Max-Planck-Institute for Solar System Research, GöttingenUNSPECIFIED
McKenna-Lawlor, S.National University of IrelandUNSPECIFIED
Meierhenrich, U.University of Nice, Nice, FranceUNSPECIFIED
Munoz-Caro, G.Centro de Astrobiologia, INTA-CSIC, MadridUNSPECIFIED
Raulin, F.CNRS and Universités Paris, 61UNSPECIFIED
Steele, A.Carnegie Inst, Washington, DC, USAUNSPECIFIED
Steininger, H.Max-Planck-Institute for Solar System Research, GöttingenUNSPECIFIED
Szopa, C.Université Pierre et Marie Curie-Paris6, Service d’Aéronomie, Paris, FranceUNSPECIFIED
Thiemann, W.Universität BremenUNSPECIFIED
Ulamec, S.DLR-Köln, stephan.ulamec (at) dlr.deUNSPECIFIED
Date:12 April 2015
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:COSAC instrument
Event Title:EGU General Assembly
Event Location:Wien, Austria
Event Type:international Conference
Event Dates:12.-17. April 2015
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt ROSETTA Lander
Location: Köln-Porz
Institutes and Institutions:Space Operations and Astronaut Training > User center for space experiments (MUSC)
Deposited By: Herrmann, Astrid
Deposited On:17 Dec 2015 09:24
Last Modified:31 Jul 2019 19:58

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