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Infrared detection of aliphatic organics on a cometary nucleus

Raponi, A and Ciarniello, M. and Capaccioni, F and Mennella, V. and Filacchione, G and Vinogradoff, V. and Poch, O. and Beck, P. and Quirico, E. and De Sanctis, M. C. and Moroz, L. V. and Kappel, David and Erard, S. and Bockelee-Morvan, D and Longobardo, A and Tosi, F and Palomba, E. and Combe, J.-P. and Rousseau, B. and Arnold, Gabriele and Carlson, R. W. and Pommerol, A. and Pilorget, C. and Fornasier, S and Bellucci, G. and Barucci, A and Mancarella, F. and Formisano, M and Rinaldi, G and Istiqomah, I. and Leyrat, C. (2020) Infrared detection of aliphatic organics on a cometary nucleus. Nature Astronomy, 4 (5), pp. 500-505. Nature Publishing Group. doi: 10.1038/s41550-019-0992-8. ISSN 2397-3366.

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Official URL: https://www.nature.com/articles/s41550-019-0992-8


The European Space Agency’s Rosetta mission1 has acquired unprecedented measurements of the surface of the nucleus of comet 67P/Churyumov–Gerasimenko (hereafter, 67P), the composition of which, as determined by in situ and remote-sensing instruments, including the VIRTIS instrument2, seems to be an assemblage of ices, minerals and organic material3. We performed a refined analysis of infrared observations of the nucleus of 67P carried out by the VIRTIS-M hyperspectral imager. We find that the overall shape of the infrared spectrum of 67P is similar to that of other carbon-rich outer Solar System objects, suggesting a possible genetic link with them. More importantly, we also confirm the complex spectral structure of the wide 2.8–3.6 µm absorption feature populated by fainter bands. Among these, we unambiguously identify the presence of aliphatic organics by their ubiquitous 3.38 µm, 3.42 µm and 3.47 µm bands. This infrared detection of aliphatic species on a cometary surface has strong implications for the evolutionary history of the primordial Solar System and is evidence that comets provide an evolutionary link between interstellar material and Solar System bodies4.

Item URL in elib:https://elib.dlr.de/197154/
Document Type:Article
Title:Infrared detection of aliphatic organics on a cometary nucleus
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Raponi, AINAF-IAPS Istituto di Astrofisica e Planetologia Spaziali, Rome, ItalyUNSPECIFIEDUNSPECIFIED
Capaccioni, FIAPS-INAF, Istituto di Astrofisica e Planetologia Spaziali, via del Fosso del Cavaliere, 100, 00133, Rome, ItalyUNSPECIFIEDUNSPECIFIED
Mennella, V.INAF-Observatorio Astronomico di Capodimonte, ItalyUNSPECIFIEDUNSPECIFIED
Filacchione, GIAPS-INAF, Istituto di Astrofisica e Planetologia Spaziali, via del Fosso del Cavaliere, 100, 00133, Rome, Italyhttps://orcid.org/0000-0001-9567-0055UNSPECIFIED
Poch, O.Laboratoire de Planétologie de Grenoble (LPG) - University Joseph Fourier Grenoble, Grenboble, FranceUNSPECIFIEDUNSPECIFIED
Beck, P.laboratoire de planétologie de grenoble (lpg) - university joseph fourier grenoble, grenboble, franceUNSPECIFIEDUNSPECIFIED
Quirico, E.Université Grenoble Alpes, IPAG, Grenoble, FranceUNSPECIFIEDUNSPECIFIED
De Sanctis, M. C.CNR - Instituto di Astrofisica Spaziale, Rome, ItalyUNSPECIFIEDUNSPECIFIED
Bockelee-Morvan, DObservatoire de ParisUNSPECIFIEDUNSPECIFIED
Longobardo, AINAF-LAPS, Via del Fosso del Cavaliere 100, I-00133 Rome, ItalyUNSPECIFIEDUNSPECIFIED
Combe, J.-P.Bear Fight Center, A Columbus Technologies and Services Inc. Affiliate, P.O. Box 667, 22 Fiddler's Road, Winthrop, WA 98862, USAUNSPECIFIEDUNSPECIFIED
Rousseau, B.LESIA, Observatoire de Paris/CNRS/Universit´e Pierre et Marie Curie/Universit´e Paris-Diderot, Meudon, 75013 Paris, FranceUNSPECIFIEDUNSPECIFIED
Carlson, R. W.Jet Propulsion LaboratoryUNSPECIFIEDUNSPECIFIED
Pommerol, A.Physikalisches Institut, Sidlerstrasse 5, University of Bern, CH-3012 Bern, SwitzerlandUNSPECIFIEDUNSPECIFIED
Pilorget, C.Institut d'Astrophysique Spatiale (IAS), CNRS/Université Paris Sud, Orsay, FranceUNSPECIFIEDUNSPECIFIED
Fornasier, SLESIA, Observatoire de Paris, Université PSL, CNRS, Univ. Paris Diderot, Sorbonne Paris Cité, Sorbonne Université, 5 Place J. Janssen, 92195 Meudon Pricipal Cedex, FranceUNSPECIFIEDUNSPECIFIED
Bellucci, G.inaf-ifsi, rome, italyUNSPECIFIEDUNSPECIFIED
Barucci, AObservatoire de Paris-Meudon, FranceUNSPECIFIEDUNSPECIFIED
Mancarella, F.Dipartimento di Matematica e Fisica "E. De Giorgi", Università del Salento, Lecce, ItalyUNSPECIFIEDUNSPECIFIED
Formisano, MIAPS-INAF, Istituto di Astrofisica e Planetologia Spaziali, via del Fosso del Cavaliere, 100, 00133, Rome, ItalyUNSPECIFIEDUNSPECIFIED
Rinaldi, GIAPS-INAF, Istituto di Astrofisica e Planetologia Spaziali, via del Fosso del Cavaliere, 100, 00133, Rome, Italyhttps://orcid.org/0000-0002-2968-0455UNSPECIFIED
Istiqomah, I.Université Grenoble Alpes, IPAG, GrenobleUNSPECIFIEDUNSPECIFIED
Leyrat, C.Università di Padova, Via Venezia 15, 35131 Padova, Italy)UNSPECIFIEDUNSPECIFIED
Date:13 January 2020
Journal or Publication Title:Nature Astronomy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 500-505
Publisher:Nature Publishing Group
Keywords:Rosetta, infrarot, Komet, 67P, Churyumov-Gerasimenko
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Exploration of the Solar System, R - Planetary Evolution and Life
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Laboratories
Institute of Planetary Research > Leitungsbereich PF
Deposited By: Helbert, Dr.rer.nat. Jörn
Deposited On:11 Sep 2023 08:00
Last Modified:18 Oct 2023 13:50

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