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Cassini Visual and Infrared Mapping Spectrometer Observations of Iapetus: Detection of CO<sup>2</sup>

Buratti, B.J. and Cruikshank, D.P. and Brown, R.H. and Clark, R.N. and Bauer, J.M. and Jaumann, R. and McCord, T.B. and Simonelli, D.P. and Hibbits, C.A. and Hansen, G.B. and Owen, T.C. and Baines, K.H. and Bellucci, G. and Bibring, J.-P. and Capaccioni, F. and Cerroni, P. and Coradini, A. and Drossart, P. and Formisano, V. and Langevin, Y. and Matson, D.L. and Mennella, V. and Nelson, R.M. and Nicholson, P.D. and Sicardy, B. and Sotin, C. and Roush, T.L. and Soderlund, K. and Muradyan, A. (2005) Cassini Visual and Infrared Mapping Spectrometer Observations of Iapetus: Detection of CO<sup>2</sup>. The Astrophysical Journal, 622, L149-L152.

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Abstract

The Visual and Infrared Mapping Spectrometer (VIMS) instrument aboard the Cassini spacecraft obtained its first spectral map of the satellite Iapetus in which new absorption bands are seen in the spectra of both the low-albedo hemisphere and the H<sub>2</sub>O ice-rich hemisphere. Carbon dioxide is identified in the low-albedo material, probably as a photochemically produced molecule that is trapped in H<sub>2</sub>O ice or in some mineral or complex organic solid. Other absorption bands are unidentified. The spectrum of the low-albedo hemisphere is satisfactorily modeled with a combination of organic tholin, poly-HCN, and small amounts of H<sub>2</sub>O ice and Fe<sub>2</sub>O<sub>3</sub>. The high-albedo hemisphere is modeled with H<sub>2</sub>O ice slightly darkened with tholin. The detection of CO<sub>2</sub> in the low-albedo material on the leading hemisphere supports the contention that it is carbon-bearing material from an external source that has been swept up by the satellite's orbital motion.

Item URL in elib:https://elib.dlr.de/18732/
Document Type:Article
Additional Information: LIDO-Berichtsjahr=2005,
Title:Cassini Visual and Infrared Mapping Spectrometer Observations of Iapetus: Detection of CO<sup>2</sup>
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Buratti, B.J.Jet Propulsion Laboratory, Pasadena, CAUNSPECIFIEDUNSPECIFIED
Cruikshank, D.P.NASA/AMES Research Center, Moffett Field, CAUNSPECIFIEDUNSPECIFIED
Brown, R.H.Lunar and Planetary Laboratory and Steward Observatory, University of Arizona, Tucson, AZUNSPECIFIEDUNSPECIFIED
Clark, R.N.U.S. Geological Survey, Denver, COUNSPECIFIEDUNSPECIFIED
Bauer, J.M.Jet Propulsion Laboratory, Pasadena, CAUNSPECIFIEDUNSPECIFIED
Jaumann, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
McCord, T.B.Planetary Geoscience Division, Institute of Geophysics and Planetology, Honolulu, HIUNSPECIFIEDUNSPECIFIED
Simonelli, D.P.Jet Propulsion Laboratory, Pasadena, CAUNSPECIFIEDUNSPECIFIED
Hibbits, C.A.Planetary Science Institute, Pasadena, CAUNSPECIFIEDUNSPECIFIED
Hansen, G.B.Planetary Science Institute, Pasadena, CAUNSPECIFIEDUNSPECIFIED
Owen, T.C.Institute for Astronomy, University of Hawaii, Honolulu, HIUNSPECIFIEDUNSPECIFIED
Baines, K.H.Jet Propulsion Laboratory, Pasadena, CAUNSPECIFIEDUNSPECIFIED
Bellucci, G.Institute di Fisica dello Spazio Interplanetario, CNR, Rome, ItalyUNSPECIFIEDUNSPECIFIED
Bibring, J.-P.Institut d'Astrophysique Spatiale, Université Paris-Sud, Orsay, FranceUNSPECIFIEDUNSPECIFIED
Capaccioni, F.Institute di Fisica dello Spazio Interplanetario, CNR, Rome, ItalyUNSPECIFIEDUNSPECIFIED
Cerroni, P.Institute di Fisica dello Spazio Interplanetario, CNR, Rome, ItalyUNSPECIFIEDUNSPECIFIED
Coradini, A.Institute di Fisica dello Spazio Interplanetario, CNR, Rome, ItalyUNSPECIFIEDUNSPECIFIED
Drossart, P.Observatoire de Paris, Meudon Cedex, FranceUNSPECIFIEDUNSPECIFIED
Formisano, V.Institute di Fisica dello Spazio Interplanetario, CNR, Rome, ItalyUNSPECIFIEDUNSPECIFIED
Langevin, Y.Institut d'Astrophysique Spatiale, Université Paris-Sud, Orsay, FranceUNSPECIFIEDUNSPECIFIED
Matson, D.L.Jet Propulsion Laboratory, Pasadena, CAUNSPECIFIEDUNSPECIFIED
Mennella, V.Institute di Fisica dello Spazio Interplanetario, CNR, Rome, ItalyUNSPECIFIEDUNSPECIFIED
Nelson, R.M.Jet Propulsion Laboratory, Pasadena, CAUNSPECIFIEDUNSPECIFIED
Nicholson, P.D.Cornell University, Department of Astronomy, Ithaca, NYUNSPECIFIEDUNSPECIFIED
Sicardy, B.Observatoire de Paris, Meudon Cedex, FranceUNSPECIFIEDUNSPECIFIED
Sotin, C.Laboratoire de Planetologie et Geodynamique, Universite de Nantes, Nantes Cedex, FranceUNSPECIFIEDUNSPECIFIED
Roush, T.L.NASA/AMES Research Center, Moffett Field, CAUNSPECIFIEDUNSPECIFIED
Soderlund, K.Jet Propulsion Laboratory, Pasadena, CAUNSPECIFIEDUNSPECIFIED
Muradyan, A.Jet Propulsion Laboratory, Pasadena, CAUNSPECIFIEDUNSPECIFIED
Date:2005
Journal or Publication Title:The Astrophysical Journal
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Volume:622
Page Range:L149-L152
Status:Published
Keywords:planets and satellites: individual (Iapetus) - solar system: formation
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Vorhaben CASSINI (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research
Deposited By: Pieth, Susanne
Deposited On:13 Dec 2005
Last Modified:14 Jan 2010 19:41

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