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Element Abundances and Isotope Ratios in the Giant Planets and Titan

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Abstract

This paper reviews our present knowledge about elemental and isotopic ratios in the Giant Planets and Titan. These parameters can provide key information about the formation and evolution of these objects. Element abundances, especially after the results of the Galileo Probe Mass Spectrometer in Jupiter, strongly support the formation model invoking an initial core formation (Mizuno, 1980; Pollack et al., 1996). They also suggest that solar composition icy planetesimals (SCIPs) brought the heavy elements to Jupiter. The Jupiter value of D/H appears to be representative of the protosolar value, while the D/H enrichment observed on Uranus and Neptune is consistent with the formation scenario of these planets. The 15N/14N measurement in Jupiter seems to be representative of its protosolar value. Future measurements are expected to come from the Cassini and Herschel space mission, as well as the ALMA submillimeter observatory.

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References

  • Allende Prieto, C., Lambert, D.L., and Asplund, M.: 2001, 'The Forbidden Abundance of Oxygen in the Sun', Astrophys. J. 556, L63–L66.

    Article  ADS  Google Scholar 

  • Allende Prieto, C., Lambert, D.L., and Asplund, M.: 2002, 'A Reappraisal of the Solar Photospheric C/O Ratio', Astrophys. J. 573, L137–141.

    Article  ADS  Google Scholar 

  • Anders, E., and Grevesse, N.: 1989, 'Abundances of the Elements — Meteorites and Solar', Geochim. Cosmochim. Acta 53, 97–214.

    Article  Google Scholar 

  • Atreya, S.K., Wong, M.H., Owen, T.C., Niemann, H.B., and Mahaffy, P.R.: 1997, 'Chemistry and Clouds of Jupiter's Atmosphere: A Galileo Perspective', in C. Barbieri et al. (eds.), The Three Galileos: the Man, the Spacecraft, the Telescope, Kluwer Acad. Publ., p. 249.

  • Atreya, S.K., Wong, M.H., Owen, T.C., Mahaffy, P.R., Niemann, H.B., de Pater, I., Drossart, P., and Encrenaz, T.: 1999, 'A Comparison of the Atmospheres of Jupiter and Saturn: Deep Atmospheric Composition, Cloud Structure, Vertical Mixing, and Origin', Planet. Space Sci. 47, 1243–1262.

    Article  ADS  Google Scholar 

  • Atreya, S.K., Mahaffy, P.R., Niemann, H.B., Wong, M.H., and Owen, T.C.: 2002, 'Composition of the Atmosphere of Jupiter — An Update', Planet. Space Sci., in press.

  • Baines, K.H., Mickelson, M.E., Larson, L.E., and Ferguson, D.W.: 1995, 'The Abundances of Methane and Ortho/para Hydrogen on Uranus and Neptune: Implications of New Laboratory 4-0 H2 Quadrupole Line Parameters', Icarus 114, 328–340.

    Article  ADS  Google Scholar 

  • Balsiger, H., Altwegg, K., and Geiss, J.: 1995, 'D/H and 16O/18O in the Hydronium Ion and in Neutral Water from in Situ Ion Measurements in Comet Halley', J. Geophys. Res. 100, 5827–5834.

    Article  ADS  Google Scholar 

  • Bézard, B., Encrenaz, T., Feuchtgruber, H., Lellouch, E., de Graauw, T., Griffin, M., and Atreya, S.K.: 1997, 'ISO-SWS Observations of Neptune', Bull. Amer. Astron. Soc. 29, 993.

    ADS  Google Scholar 

  • Bjoraker, G.L., Larson, H.P., and Kunde, V.G.: 1986, 'The Gas Composition of Jupiter Derived from 5-micron Airborne Spectroscopic Measurements', Icarus 66, 579–609.

    Article  ADS  Google Scholar 

  • Bockelée-Morvan, D., et al.: 1998, 'Deuterated Water in Comet C/1996 B2 (Hyakutake) and its Implication for the Origin of Comets', Icarus 133, 147–162.

    Article  ADS  Google Scholar 

  • Combes, M., Maillard, J.P., and de Bergh, C.: 1977, 'Evidence for a Telluric Value of the 12C/13C Ratio in the Atmospheres of Jupiter and Saturn', Astron. Astrophys. 61, 531–537.

    ADS  Google Scholar 

  • Conrath, B.J., and Gautier, D.: 2000, 'Saturn Helium Abundance: A Reanalysis of Voyager Measurements', Icarus 144, 124–134.

    Article  ADS  Google Scholar 

  • Courtin, R., Gautier, D., Marten, A., and Kunde, V.: 1983, 'The 12C/13C Ratio in Jupiter from the Voyager Infrared Investigation', Icarus 53, 121–132.

    Article  ADS  Google Scholar 

  • Courtin, R., Gautier, D., Marten, A., Bézard, B., and Hanel, R.A.: 1984, 'The Composition of Saturn's Atmosphere at Northern Temperate Latitudes from Voyager IRIS Spectra: NH3, PH3, C2H2, C2H6, CH3D and the Saturnian D/H Isotopic Ratio', Astrophys. J. 287, 899–916.

    Article  ADS  Google Scholar 

  • Coustenis, A., Salama, A., Lellouch, E., Encrenaz, T., Bjoraker, G.L., Samuelson, R.E., de Graauw, T., Feuchtgruber, H., and Kessler, M.F.: 1998, 'Evidence for Water Vapor in Titan's Atmosphere from ISO/SWS Data', Astron. Astrophys. 336, L85–L89.

    ADS  Google Scholar 

  • Coustenis, A., Bézard, B., Encrenaz, T., Gautier, D., Lellouch, E., Salama, A., Lacy, J., and Orton, G.S.: 2001, 'The D/H Ratio on Titan from ISO and IRSHELL Data', Bull. Amer. Astron. Soc. 33, 1108.

    ADS  Google Scholar 

  • Crovisier, J., and Bockelée-Morvan, D.: 1999, 'Remote Observations of the Composition of Cometary Volatiles', Space Sci. Rev. 90, 19–32.

    Article  ADS  Google Scholar 

  • Drossart, P., Encrenaz, T., Kunde, V., Hanel, R., and Combes, M.: 1982, 'An Estimate of the PH3, CH3D, and GeH4 Abundances on Jupiter from the Voyager IRIS Data at 4.5 Microns', Icarus 49, 416–426.

    Article  ADS  Google Scholar 

  • Drossart, P., Lacy, J., Serabyn, E., Tokunaga, A., Bézard, B., and Encrenaz, Th.: 1985, 'Detection of 12C13CH2 on Jupiter at 13 Microns', Astron. Astrophys. 149, L10–L12.

    ADS  Google Scholar 

  • de Bergh, C., Chauville, J., Lutz, B.L., Owen T., and Brault, J.: 1986, 'Monodeuterated Methane in the Outer Solar System. II. Its Detection on Uranus at 1.6 Microns', Astrophys. J. 311, 501–510.

    Article  ADS  Google Scholar 

  • de Bergh, C., Lutz, B.L., Owen, T., and Maillard, J.P.: 1990, 'Monodeuterated Methane in the Outer Solar System. IV. Its Detection and Abundance on Neptune', Astrophys. J. 355, 661–666.

    Article  ADS  Google Scholar 

  • de Graauw, T. et al.: 1997, 'First Results of ISO-SWS Observations of Saturn: Detection of CO2, CH3C2H, C4H2 and Tropospheric H2O', Astron. Astrophys. 321, L13–L16.

    ADS  Google Scholar 

  • de Pater, I., and Massie, S.T.: 1985, 'Models of the Millimeter-centimeter Spectra of the Giant Planets', Icarus 62, 143–171.

    Article  ADS  Google Scholar 

  • Eberhardt, P., Reber, M., Krankowsky, D., and Hodges, R.R.: 1995, 'The D/H and 16O/18O Ratios in Water from Comet Halley', Astron. Astrophys. 302, 301–316.

    ADS  Google Scholar 

  • Encrenaz, T., Combes, M., and Zéau, Y.: 1978, 'The Spectrum of Jupiter between 10 and 13 Microns: an Estimate of the 14N/15N Ratio', Astron. Astrophys. 70, 29–36.

    ADS  Google Scholar 

  • Encrenaz, T., d'Hendecourt, L., and Puget, J.-L.: 1988: 'The Interpretation of the 3.2-3.5 Micron Emisison Feature in the Spectrum of Comet P/Halley: Abundances in the Comet and in Interstellar Matter', Astron. Astrophys. 207, 162–173.

    ADS  Google Scholar 

  • Fegley, B., Jr., and Lodders, K.: 1994, 'Chemical Models of the Deep Atmospheres of Jupiter and Saturn', Icarus 110, 117–154.

    Article  ADS  Google Scholar 

  • Feuchtgruber, H., Lellouch, E., Bézard, B., Encrenaz, T., de Graauw, T., Davis, G.R.: 1999, 'Detection of HD in the Atmospheres of Uranus and Neptune: a new Determination of the D/H Ratio', Astron. Astrophys. 341, L17–L21.

    ADS  Google Scholar 

  • Fouchet, T.: 2002, private communication.

  • Fouchet, T., Lellouch, E., Bézard, B., Encrenaz, T., Drossart, P., Feuchtgruber, H., de Graauw, T.: 2000, 'ISO-SWS Observations of Jupiter: Measurement of the Ammonia Tropospheric Profile and of the 15N/14N Ratio', Icarus 143, 223–243.

    Article  ADS  Google Scholar 

  • Gautier, D., and Owen, T.: 1989, 'The Composition of Outer Planet Atmospheres', in S.K. Atreya, J.B. Pollack, and M.S. Matthews (eds.), Origin and Evolution of Planetary and Satellite Atmospheres, Univ. Arizona Press, Tucson, pp. 487–512.

    Google Scholar 

  • Gautier, D., Hersant, F., Mousis, O., and Lunine, J.: 2001a, 'Enrichments in Volatiles: a new Interpretation of the Galileo Measurements', Astrophys. J. 550, L227–L230.

    Article  ADS  Google Scholar 

  • Gautier, D., Hersant, F., Mousis, O., and Lunine, J.: 2001b, 'Erratum: Enrichments in Volatiles: a new Interpretation of the Galileo Measurements', Astrophys. J. 559, L183.

    Article  ADS  Google Scholar 

  • Geiss, J.: 1987, 'Composition Measurements and the History of Cometary Matter', Astron. Astrophys. 187, 859–866.

    ADS  Google Scholar 

  • Geiss, J., and Gloeckler, G.: 1998, 'Abundances of Deuterium and Helium-3 in the Protosolar Cloud', Adv. Space Res. 84, 239–250.

    Google Scholar 

  • Grevesse, N., and Sauval, A.J.: 1998, 'Standard Solar Composition', Space Sci. Rev. 85, 161–174.

    Article  ADS  Google Scholar 

  • Griffin, M.J., et al.: 1986, 'First Detection of the 56-Micron Rotational Line of D in Saturn's Atmosphere', Astron. Astrophys. 315, L389–L392.

    ADS  Google Scholar 

  • Guillot, T.: 1999, 'A Comparison of the Interiors of Jupiter and Saturn', Planet. Space Sci. 47, 1183–1200.

    Article  ADS  Google Scholar 

  • Guillot, T., and Gladman, B.: 2000, 'Late Planetesimal Delivery and the Composition of Giant Planets', in F. Garzon, C. Eiroa, D. de Winter, and T.J. Mahoney (eds.), Disks, Planetesimals and Planets, ASP Conf. Ser. 219, 475–485.

  • Hersant, F., Gautier, D., and Huré, J.-M.: 2001, 'A Two-dimenssional Model for the Primordial Nebula Constrained by D/H Measurements in the Solar System: Implications for the Formation of Giant Planets', Astrophys. J. 554, 391–407.

    Article  ADS  Google Scholar 

  • Hidayat, T.: 1997, 'Observations hétérodynes millimétriques et submillimétriques de Titan: étude de la composition chimique de son atmosphère', Ph.D. Thesis, Université Paris VII.

  • Hidayat, T., Marten, A., Bézard, B., Gautier, D., Owen, T., Matthews, H.E., and Paubert, G.: 1997, 'Millimeter and Submillimeter Heterodyne Observations of Titan: Retrieval of the Vertical Profile of HCN and the 12C/13C Ratio', Icarus 126, 170–182.

    Article  ADS  Google Scholar 

  • Holweger, H.: 2001, 'Photospheric Abundances: Problems, Updates, Implications', in R.F. Wimmer-Schweingruber (ed.), Solar and Galactic Composition, AIP Conf. Ser. 598, pp. 24–30.

  • Hubbard, W.B., and McFarlane, J.J.: 1980, 'Theoretical Preditions of Deuterium Abundances in the Jovian Planets', Icarus 44, 676–682.

    Article  ADS  Google Scholar 

  • Hunten, D.M., Tomasko, M.G., Flasar, M.F., Samuelson, R.E., Strobel, D.F., and Stevenson, D.J.: 1983, 'Titan', in T. Gehrels and M.S. Matthews (eds.), Saturn, Univ. Ariz. Press, pp. 671–759.

  • Irvine, W.M., and Knacke, R.F.: 1999, 'The Chemistry of Interstellar Gas and Grains', in S.K. Atreya, J.B. Pollack, and M.S. Matthews (eds.), Origin and Evolution of Planetary and Satellite Atmospheres, Univ. Arizona Press, Tucson, pp. 3–34.

    Google Scholar 

  • Kouchi, A., Yamamoto, T., Kozasa, T., Kuroda, T., and Greenberg, J.M.: 1994, 'Conditions for Condensation and Preservation of Amorphous Ice and Crystallinity of Astrophysical Ices', Astron. Astrophys. 290, 1009–1018.

    ADS  Google Scholar 

  • Krankowsky, D.: 1991, 'The Composition of Comets', in R.L. Newburn, M. Neugebauer, and J. Rahe (eds.), Comets in the Post-Halley Era, Kluwer Acad. Publ., pp. 855–877.

  • Lammer, H., Stumptner, W., Molina-Cuberos, G.J., Bauer, S.J., and Owen, T.: 2000, 'Nitrogen Isotope Fractionation and its Consequence for Titan's Atmospheric Evolution', Planet. Space Sci. 48, 529–543.

    Article  ADS  Google Scholar 

  • Lammer, H., and Bauer, S.J.: 2003, 'Isotopic Fractionation by Gravitational Escape', Space Sci. Rev., this volume.

  • Lecluse, C., Robert, F., Gautier, D., and Guiraud, M.: 1996, 'Deuterium Enrichment in the Giant Planets', Planet. Space Sci. 44, 1579–1592.

    Article  ADS  Google Scholar 

  • Lellouch, E., Bézard, B., Fouchet, T., Feuchtgruber, H., Encrenaz, T., and de Graauw, T.: 2001, 'The Deuterium Abundance in Jupiter and Saturn from ISO-SWS Observations', Astron. Astrophys. 370, 610–622.

    Article  ADS  Google Scholar 

  • Lunine, J.I., Yung, Y.L., and Lorentz, R.D.: 1999, 'On the Volatile Inventory of Titan from Isotopic Abundances in Nitrogen and Methane', Planet. Space Sci. 47, 1291–1303.

    Article  ADS  Google Scholar 

  • Mahaffy, P.R., Donahue, T.M., Atreya, S.K., Owen, T.C., and Niemann, H.B.: 1998, 'Galileo Probe Measurements of D/H and 3He/4He in Jupiter's Atmosphere', Space Sci. Rev. 84, 251–263.

    Article  ADS  Google Scholar 

  • Mahaffy, P.R., Niemann, H.B., Alpert, A., Atreya, S.K., Demick, J., Donahue, T.M., Harpold, D.N., and Owen, T.C.: 2000, 'Noble Gas Abundance and Isotope Ratios in the Atmosphere of Jupiter from the Galileo Probe Mass Spectrometer', J. Geophys. Res. 105, 15061–15071.

    Article  ADS  Google Scholar 

  • Marten, A., Courtin, R., Gautier, D., and Lacombe, A.: 1980, 'Ammonia Vertical Density Profiles on Jupiter and Saturn from their Radioelectric and Infrared Emissivities', Icarus 41, 410–422.

    Article  ADS  Google Scholar 

  • Marten, A., Hidayat, T., Moreno, R., Paubert, G., Bézard, B., Gautier, D., Matthews, H.E., and Owen, T: 1997, IAU Circ. 6702, 1997 July 19.

  • Matthews, H., and Jewitt, D.: 1997, IAUC 6567, 1997 Feb. 24.

  • Matthews, H.E., Marten, A., Moreno, R., and Owen, T.: 2002, 'The Jovian Stratosphere after Comet Shoemaker-Levy 9: Unusual Isotopic Ratios in Molecular Trace Constituents', Astrophys. J. 580, 598–605.

    Article  ADS  Google Scholar 

  • Meier, R., Owen, T., Matthews, H.E., Jewitt, D.C., Bockelée-Morvan, D., Biver, N., Crovisier, J., and Gautier, D.: 1998, 'A Determination of the HDO/H2O Ratio in Comet C/1995 O1 (Hale-Bopp)', Science 279, 842–844.

    Article  ADS  Google Scholar 

  • Meier, R., and Owen, T.: 1999, 'Cometary Deuterium', in K. Altwegg, P. Ehrenfreund, J. Geiss, and R. Huebner (eds.), Composition and Origin of Cometary Materials, Space Sci. Rev. 90, 33–44.

  • Mizuno, H.: 1980, 'Formation of the Giant Planets', Prog. Theor. Phys. 64, 544–557.

    Article  ADS  Google Scholar 

  • Mousis, O., Gautier, D., and Bockelée-Morvan, D.: 2002, 'An Evolutionary Turbulent Model of Saturn's Subnebula: Implications for the Origin of the Atmophere of Titan', Icarus 156, 162–175.

    Article  ADS  Google Scholar 

  • Nier, A., and McElroy, M.B.: 1977, 'Composition and Structure of Mars' Upper Atmosphere: Results from the Neutral Mass Spectrometers at Viking 1 and 2', J. Geophys. Res. 82, 4341–4350.

    Article  ADS  Google Scholar 

  • Niemann, H.B., et al.: 1998, 'The Composition of the Jovian Atmosphere as Determined by the Galileo Probe Mass Spectrometer', J. Geophys. Res. 103, 22831–22845.

    Article  ADS  Google Scholar 

  • Noll, K.S., and Larson, H.P.: 1991, 'The Spectrum of Saturn from 1990 to 2230 cm−1: Abundances of ASH3, CH3D, CO, GeH4, NH3 and PH3', Icarus 89, 168–189.

    Article  ADS  Google Scholar 

  • Orton, G.S., Lacy, J.H., Achtermann, J.M., Parmar, P., and Blass, W.E.: 1992, 'Thermal Spectroscopy of Neptune: the Stratospheric Temperature, Hydrocarbon Abundances, and Isotopic Ratios', Icarus 100, 541–555.

    Article  ADS  Google Scholar 

  • Owen, T.: 2000a, 'Planets and Life', in B. Schuerman (ed.), Darwin and Astronomy, pp. 163–172.

  • Owen, T.: 2000b, 'On the Origin of Titan's Atmosphere', Planet. Space Sci. 48, 747–752.

    Article  ADS  Google Scholar 

  • Owen, T., and Bar-Nun, A.: 1995, 'Comets, Impacts and Atmospheres', Icarus 116, 215–226.

    Article  ADS  Google Scholar 

  • Owen, T., and Bar-Nun, A.: 2000, 'From the Interstellar Medium to Planetary Atmospheres via Comets', in: Bioastronomy 99: A new Era in the Search for Life.

  • Owen, T., Lutz, B.L., and de Bergh, C.: 1986, 'Deuterium in the Outer Solar System: Evidence for Two Distinct Reservoirs', Nature 320, 244–246.

    Article  ADS  Google Scholar 

  • Owen, T.C., Atreya, S.K., Mahaffy, P.R., Niemann, H.B., and Wong, M.H.: 1997, 'On the Origin of Jupiter's Atmosphere and the Volatiles on the Medicean Stars', in C. Barbieri et al. (eds.), The Three Galileos: the Man., the Spacecraft, the Telescope, Kluwer Acad. Publ., p. 289.

  • Owen, T., Mahaffy, P., Niemann, H.B., Atreya, S., Donahue, T., Bar-Nun, A., and de Pater, I.: 1999a, 'A Low-temperature Origin for the Planetesimals that Formed Jupiter', Nature 402, 269–270.

    Article  ADS  Google Scholar 

  • Owen, T., Biver, N., Marten, A., Matthews, H.E., and Meier, R.: 1999, IAU Circ. 7306, 1999 Nov. 11.

  • Owen, T., Mahaffy, P.R., Niemann, H.B., Atreya, S.K., and Wong, M.: 2001, 'Protosolar Nitrogen', Astrophys. J. 553, L77–L79.

    Article  ADS  Google Scholar 

  • Pepin, R.O.: 2003, 'On Noble Gas Processing in the Solar Accretion Disk', Space Sci. Rev., this volume.

  • Pepin, R.O., Becker, R.H., and Schlutter, D.J.: 1999, 'Irradiation Records in Regolith Materials, I: Isotopic Compositions of Solar-wind Neon and Argon in Single Lunar Mineral Grains', Geochim. Cosmochim. Acta 63, 2145–2162.

    Article  ADS  Google Scholar 

  • Pollack, J.B., and Bodenheimer, P.: 1989, 'Theories of the Origin and Evolution of the Giant Planets', in S.K. Atreya, J.B. Pollack, and M.S. Matthews (eds.), Origin and Evolution of Planetary and Satellite Atmospheres, Univ. Arizona Press, Tucson, pp. 564–602.

    Google Scholar 

  • Pollack, J.B., et al.: 1996, 'Formation of the Giant Planets by Concurrent Accretion of Solids and Gas', Icarus 124, 62–85.

    Article  ADS  Google Scholar 

  • Roulston, M.S., and Stevenson, D.J.: 1995, 'Predictions of Neon Depletion in Jupiter's Atmosphere' (abstract), Eos Trans. AGU 76(46), Fall Meet. Suppl. F, p. 343.

    Google Scholar 

  • Samuelson, R.E., Maguire, W.C., Hanel, R.A., Kunde, V.G., Jennings, D.E., Yung, Y.L., and Aikin, A.C.: 1983, 'CO2 on Titan', J. Geophys. Res. 88, 8709–8715.

    ADS  Google Scholar 

  • Stevenson, D.J., and Salpeter, E.E.: 1977, 'The Dynamics and Helium Distribution Properties for Hydrogen-helium Fluid Planets', Astrophys. J. Suppl. 35, 239–261.

    Article  ADS  Google Scholar 

  • Strobel, D.F.: 1982, 'Chemistry and Evolution of Titan's Atmosphere', Origins of Life 12, 244.

    Article  ADS  Google Scholar 

  • Terzieva, R., and Herbst, E.: 2000, 'The Possibility of Nitrogen Isotoic Fractionation in Interstellar Clouds', Month. Not. Royal Astron. Soc. 317, 563–568.

    Article  ADS  Google Scholar 

  • Tokunaga, A.T., Ridgway, S.T., and Knacke, R.F.: 1980, 'High Spatial and Spectral Resolution 10-microns Observations of Jupiter', Icarus 44, 93–101.

    Article  ADS  Google Scholar 

  • von Zahn, U., Hunten, D.M., and Lehmacher, G.: 1998, 'Helium in Jupiter's Atmosphere: Results from the Galileo Probe Helium Interferometer Experiment', J. Geophys. Res. 103, 22815–22829.

    Article  ADS  Google Scholar 

  • Weaver, H.A., Feldman, P.D., Combi, M.R., Krasnopolsky, V., Lisse, C.M., and Shemansky, D.E.: 2002, 'A Search for Argon and OVI in three Comets using the Far Ultraviolet Spectroscopic Explorer', Astrophys. J. 576, L95–L98.

    Article  ADS  Google Scholar 

  • Weidenschilling, S.J.: 1997, 'The Origin of Comets in the Solar Nebula; A Unified Model', Icarus 127, 290–306.

    Article  ADS  Google Scholar 

  • Weisstein, E.W., and Serabyn, E.: 1994, 'Detection of the 267 GHz J=1−0 Rotational Transition of PH3 in Saturn with a new Fourier-transform Spectrometer', Icarus 109, 367–381.

    Article  ADS  Google Scholar 

  • Womack, M., Wykoff, S., and Ziurys, L.M.: 1992, 'Observational Constraints on Solar Nebula Nitrogen Chemistry', Astrophys. J. 401, 728–735.

    Article  ADS  Google Scholar 

  • Wong, M.H., et al.: 2002a, 'Condensible Volatiles in the Galileo Probe Entry Site', in preparation.

  • Wong, A.S., Morgan, C.G., Yung, Y.L., and Owen, T.: 2002b, 'Evolution of CO in Titan', Icarus 155, 382–392.

    Article  ADS  Google Scholar 

  • Yung, Y.L., Allen, M., and Pinto, J.P.: 1984, 'Photochemistry of the Atmosphere of Titan — Comparison between Models and Observations', Astrophys. J. Suppl. 55, 465–506.

    Article  ADS  Google Scholar 

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  1. Institute for Astronomy, University of Hawaii at Manoa, Honolulu, HI, 96822, USA

    T. Owen

  2. LESIA, Observatoire de Paris, 92195, Meudon, France

    T. Encrenaz

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Owen, T., Encrenaz, T. Element Abundances and Isotope Ratios in the Giant Planets and Titan. Space Science Reviews 106, 121–138 (2003). https://doi.org/10.1023/A:1024633603624

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