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Molecular Abundances in Comets

Published online by Cambridge University Press:  19 July 2016

Jacques Crovisier*
Affiliation:
Observatoire de Paris, Section de Meudon, F–92195 Meudon, France E-mail CROVISIE@FRMEU51.BITNETor MESIOA :: CROVISIE

Abstract

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The molecular composition of cometary volatiles is a basic information on the nature of comets and a clue to their formation mechanisms. It is only recently that direct identifications of cometary volatiles were obtained through in situ exploration as well as from remote sensing at UV, IR and radio wavelengths. An inventory of known cometary volatiles is presented, with a critical review of the evaluations of their abundances.

Type
Physical Observations and Modeling
Copyright
Copyright © Kluwer 1994 

References

A'Hearn, M.F., Feldman, P.D. and Schleicher, D.G.: 1983, “The discovery of S2 in comet Iras-Araki-Alcock 1983d.” Astrophys. J. Lett., 274, L99L103.Google Scholar
Allen, M., Delitsky, M., Huntress, W. et al. : 1987, “Evidence for methane and ammonia in the coma of P/Halley.” Astron. Astrophys., 187, 502512.Google Scholar
Altenhoff, W.J., Batrla, W., Huchtmeier, W.K. et al. : 1984, “Radio observations of comet 1983d.” Astron. Astrophys. Lett., 125, L19L22.Google Scholar
Arpigny, C., Rahe, J., Donn, B., Dossin, B. and Wyckoff, S.: 1994, Atlas of Cometary Spectra, Reidel, Dordrecht, in press.Google Scholar
Azoulay, G. and Festou, M.C.: 1986, “The abundance of sulphur in comets.” In Asteroids, Comets, Meteors II (Lagerkvist, C.-I., Lindblad, B.A, Lunds, H., Rickman, H., Eds.), 273277, Uppsala Univ. Reprocentralen.Google Scholar
Balsiger, H., Altwegg, K., Buhler, F. et al. : 1986, “Ion composition and dynamics at comet Halley.” Nature, 321, 330334.CrossRefGoogle Scholar
Bockelée-Morvan, D., Crovisier, J., Despois, D. et al. : 1987, “Molecular observations of comets P/Giacobini-Zinner 1984e and P/Halley 1982i at millimetre wavelengths.” Astron. Astrophys., 180, 253262.Google Scholar
Bockelée-Morvan, D. and Crovisier, J.: 1989, “The nature of the 2.8 μm feature in cometary spectra.” Astron. Astrophys., 216, 278283.Google Scholar
Bockelée-Morvan, D., Crovisier, J., Colom, P., Despois, D. and Paubert, G.: 1990, “Observations of parent molecules in comets at millimetre wavelengths: HCN, H2S, H2CO and CH3OH.” ESA–SP315, 143148.Google Scholar
Bockelée-Morvan, D., Colom, P., Crovisier, J., Despois, D. and Paubert, G.: 1991, “Microwave detection of hydrogen sulphide and methanol in comet Austin (1989c1).” Nature, 350, 318320.Google Scholar
Bockelée-Morvan, D. and Crovisier, J.: 1992, “Formaldehyde in comets: II. Excitation of the rotational lines.” Astron. Astrophys., 264, 282291.Google Scholar
Bockelée-Morvan, D., Brooke, T.Y. and Crovisier, J.: 1994a, “On the origins of the 3.2-3.6 μm emission feature in comets.” Icarus, submitted.CrossRefGoogle Scholar
Bockelée-Morvan, D., Crovisier, J., Colom, P. and Despois, D.: 1994b, “The rotational lines of methanol in comets Austin 1990 V and Levy 1990 XX.” Astron. Astrophys., in press.Google Scholar
Bockelée-Morvan, D., Padman, R., Davies, D.K. and Crovisier, J.: 1994c, “Observations of submillimetre lines of CH3OH, HCN and H2CO in comet P/Swift-Tuttle with the James Clerk Maxwell Telescope.” Planet. Space Sci., in press.Google Scholar
Brooke, T.Y., Tokunaga, A.T., Weaver, H.A., Chin, G. and Geballe, T.R.: 1991, “A sensitive upper limit on the methane abundance in comet Levy (1990c).” Astrophys. J. Lett., 372, L113L116.Google Scholar
Budzien, S.A. and Feldman, P.D.: 1992, “Upper limits to the S2 abundance in several comets observed with the International Ultraviolet Explorer.” Icarus, 99, 143152.CrossRefGoogle Scholar
Bus, S.J., A'Hearn, M.F., Schleicher, D.G. and Bowell, E.: 1991, “Detection of CN emission from (2060) Chiron.” Science, 251, 774777.Google Scholar
Cochran, A.L. and Cochran, W.D.: 1991, “The first detection of CN and the distribution of CO+ gas in the coma of comet P/Schwassmann-Wachmann 1.” Icarus, 90, 172175.CrossRefGoogle Scholar
Colom, P., Crovisier, J., Bockelée-Morvan, D., Despois, D. and Paubert, G.: 1992, “Formaldehyde in comets: I.” Astron. Astrophys., 264, 270281.Google Scholar
Combes, M., Moroz, V.I., Crovisier, J. et al. : 1988, “The 2.5 to 12 μm spectrum of comet Halley from the IKS-VEGA experiment.” Icarus, 76, 404436.CrossRefGoogle Scholar
Crovisier, J.: 1984, “The water molecule in comets: fluorescence mechanisms and thermodynamics of the inner coma.” Astron. Astrophys., 130, 361372.Google Scholar
Crovisier, J.: 1987, “Rotational and vibrational synthetic spectra of linear parent molecules in comets.” Astron. Astrophys. Suppl., 68, 223258.Google Scholar
Crovisier, J. and Encrenaz, T.: 1983: “Infrared fluorescence of molecules in comets: the general synthetic spectrum.” Astron. Astrophys., 126, 170182.Google Scholar
Crovisier, J. and Schloerb, F.P.: 1991, “The study of comets at radio wavelengths.” In Comets in the Post-Halley Era (Newburn, R.L. Jr., Neugebauer, M., Rahe, J., Eds.), 149173, Kluwer, Dordrecht.Google Scholar
Crovisier, J., Despois, D, Bockelée-Morvan, D., Colom, P. and Paubert, G.: 1991, “Microwave observations of hydrogen sulfide and searches for other sulfur compounds in comets Austin (1989c1) and Levy (1990c).” Icarus, 93, 246258.Google Scholar
Crovisier, J., Bockelée-Morvan, D., Colom, P., Despois, D. and Paubert, G.: 1993, “A search for parent molecules at millimetre wavelengths in comets Austin 1990 V and Levy 1990 XX: upper limits for undetected species.” Astron. Astrophys., 269, 527540.Google Scholar
Davies, J.K., Green, S.F. and Geballe, T.R.: 1991, “The detection of a strong 3.28 μm emission feature in comet Levy.” Mon. Not. Roy. Astron. Soc., 251, 148151.Google Scholar
Davies, J.K., Mumma, M.J., Reuter, D.C., et al.: 1993, “The 3.2-3.6 micron spectrum of comet P/Swift-Tuttle.” Mon. Not. Roy. Astron. Soc., 251, 10221026.Google Scholar
Despois, D., Paubert, G., Colom, P., Bockelée-Morvan, D. and Crovisier, J.: 1994, “Observations of comet P/Swift-Tuttle 1992t at IRAM.” Planet. Space Sci., in press.Google Scholar
DiSanti, M.A., Mumma, M.J. and Lacy, J.H.: 1992a: “A sensitive upper limit to OCS in comet Austin (1989c1) from a search for ν2 emission at 4.85 μm.” Icarus, 97, 155158.Google Scholar
DiSanti, M.A., Mumma, M.J., Lacy, J.H. and Parmar, P.: 1992b, “A possible detection of infrared emission from CO in comet Austin (1989c1).” Icarus, 96, 151160.Google Scholar
Drapatz, S., Larson, H.P. and Davis, D.S.: 1987, “Search for methane in comet P/Halley.” Astron. Astrophys, 187, 497501.Google Scholar
Eberhardt, P., Krankowsky, D., Schulte, U. et al. : 1987, “The CO and N2 abundance in comet P/Halley.” Astron. Astrophys., 187, 481484.Google Scholar
Eberhardt, P., Meier, R., Krankowsky, D. and Hodges, R.R.: 1991, “Methanol abundance in comet P/Halley from in situ measurements.” B.A.A.S., 23, 1161.Google Scholar
Encrenaz, T., d'Hendecourt, L. and Puget, J.L.: 1988, “The interpretation of the 3.2–3.5 μm emission feature in the spectrum of comet P/Halley: abundances in the comet and in interstellar matter.” Astron. Astrophys., 207, 162173.Google Scholar
Encrenaz, T. and Knacke, R.F.: 1991, “Carbonaceous compounds in comets: infrared observations.” In Comets in the Post-Halley Era (Newburn, R. L. Jr., Neugebauer, M., Rahe, J., Eds.), 107137, Kluwer, Dordrecht.CrossRefGoogle Scholar
Espinasse, S., Klinger, J., Ritz, C. and Schmitt, B.: 1991, “Modelling of the thermal behaviour and of the chemical differentiation of cometary nuclei.” Icarus, 92, 350365.CrossRefGoogle Scholar
Feldman, P.D.: 1991, “Ultraviolet spectroscopy of cometary comae.” In Comets in the Post-Halley Era (Newburn, R. L. Jr., Neugebauer, M., Rahe, J., Eds.), 139148, Kluwer, Dordrecht.CrossRefGoogle Scholar
Feldman, P.D. and Brune, W.H.: 1976, “Carbon production in comet West (1975n).” Astrophys. J. Lett., 209, L45L48.CrossRefGoogle Scholar
Feldman, P.D., Davidsen, A.F., Blair, W.P. et al. : 1991, “Observations of comet Levy (1990c) with the Hopkins ultraviolet telescope.” Astrophys. J. Lett., 379, L37L40.Google Scholar
Feldman, P.D., Fournier, K.B., Grinin, V.P. and Zvereva, A.M.: 1993, “The abundance of ammonia in comet P/Halley derived from ultraviolet spectrophotometry of NH by ASTRON and IUE.” Astrophys. J., 404, 348355.CrossRefGoogle Scholar
Festou, M.C., Rickman, H. and West, R.M.: 1993, “Comets.” Astron. Astrophys. Rev., 4, 363447 and 5, 37–163.CrossRefGoogle Scholar
Fink, U.: 1992, “Comet Yanaka (1988r): a new class of carbon-poor comet.” Science, 257, 19261929.Google Scholar
Geiss, J., Altwegg, K., Anders, E. et al. : 1991, “Interpretation of the ion mass spectra in the mass per charge range 25–35 amu/e obtained in the inner coma of Halley's comet by the HIS-sensor of the Giotto IMS experiment.” Astron. Astrophys., 247, 226234.Google Scholar
Greenberg, J.M. and Shalabiea, O.: 1994, “Comets as a reflection of interstellar medium chemistry.” This volume.Google Scholar
Greenberg, J.M., Singh, P.D. and de Almeda, A.A.: 1993, “What is new about the new comet Yanaka (1988r)?” Astrophys. J. Lett., 414, L45L48.CrossRefGoogle Scholar
Haider, S.A., Bhardwaj, A. and Singhal, R.P.: 1993, “Role of auroral and photoelectrons on the abundance of methane and ammonia in the coma of comet Halley.” Icarus, 101, 234243.CrossRefGoogle Scholar
Hoban, S., Mumma, M., Reuter, D. et al. : 1991, “A tentative identification of methanol as the progenitor of the 3.52 μm feature in several comets.” Icarus, 93, 122134.Google Scholar
Hoban, S., Reuter, D.C., DiSanti, M.A., Mumma, M.J. and Elston, R.: 1994, “Infrared observations of methanol in comet P/Swift-Tuttle.” Icarus, in press.Google Scholar
Huebner, W.F., Keller, H.U., Jewitt, D., Klinger, J. and West, R., Eds: 1993, Workshop on the Activity of Distant Comets, Southwest Research Institute, San Antonio, Texas.Google Scholar
Huebner, W.F., Snyder, L.E. and Buhl, D.: 1974, “HCN radio emission from comet Kohoutek (1973f).” Icarus, 23, 580585.Google Scholar
Ip, W.-H., Balsiger, H., Geiss, J. et al. : 1990, “Giotto IMS measurements of the production rate of hydrogen cyanide in the coma of comet Halley.” Ann. Geophys., 8, 319326.Google Scholar
Kawara, K., Gregory, B., Yamamoto, T. and Shibai, H.: 1988, “Infrared spectroscopic observation of methane in comet P/Halley.” Astron. Astrophys., 207, 174181.Google Scholar
Kim, S.J. and A'Hearn, A.F.: 1991, “Upper limits for SO and SO2 in comets.” Icarus, 90, 7995.Google Scholar
Kim, S.J., A'Hearn, M.F. and Larson, S.M.: 1990, “Multi-cycle fluorescence: application to S2 in comet Iras-Araki-Alcock 1983d.” Icarus, 87, 440451.Google Scholar
Krankowsky, D.: 1991, “The composition of comets.” In Comets in the Post-Halley Era (Newburn, R. L. Jr., Neugebauer, M., Rahe, J., Eds.), 855877, Kluwer, Dordrecht.Google Scholar
Krankowsky, D., Lammerzahl, P., Herrwerth, I. et al. : 1986, “In situ gas and ion measurements at comet Halley.” Nature, 321, 326329.Google Scholar
Krasnopolsky, V.A., Gogoshev, M., Moreels, G. et al. : 1986, “Spectroscopic study of comet Halley by the Vega 2 three-channel spectrometer.” Nature, 321, 269271.Google Scholar
Lagerkvist, C.-I., Rickman, H., Lindblad, B.A. and Lindgren, M., Eds. : 1990, Asteroids Comets Meteors III, Uppsala Univ. Reprocentralen.Google Scholar
Larson, L., Weaver, H.A., Mumma, M.J. and Drapatz, S.: 1988, “Airborne infrared spectroscopy of comet Wilson (1986l) and comparisons with comet Halley.” Astrophys. J., 338, 11061114.Google Scholar
Lutz, B.L., Womack, M. and Wagner, R.M.: 1993, “Ion abundances and implications for photochemistry in comets Halley (1986 III) and Bradfield (1987 XXIX).” Astrophys. J., 407, 402411.Google Scholar
Marconi, M.L., Mendis, D.A., Korth, A. et al. : 1990, “The identification of H3S+ with the ion of mass per charge (m/q) 35 observed in the coma of comet Halley.” Astrophys. J. Lett., 352, L17L20.Google Scholar
Meech, K.J.: 1991, “Physical aging in comets.” In Comets in the Post-Halley Era (Newburn, R.L. Jr., Neugebauer, M., Rahe, J., Eds.), 629669, Kluwer, Dordrecht.Google Scholar
Meier, R., Eberhardt, P., Krankowsky, D. and Hodges, R.R.: 1993, “The extended formaldehyde source in comet P/Halley.” Astron. Astrophys., 277, 677690.Google Scholar
Mitchell, D.L., Lin, R.P., Carlson, C.W. et al. : 1992, “The origin of complex organic ions in the coma of comet Halley.” Icarus, 98, 125133.Google Scholar
Moreels, G., Clairemidi, J., Hermine, P., Brechignac, P. and Rousselot, P.: 1994, “Detection of a polycyclic aromatic molecule in P/Halley.” Astron. Astrophys., in press.Google Scholar
Mumma, M.J. and Reuter, D.C.: 1989, “On the identification of formaldehyde in Halley's comet.” Astrophys. J., 344, 940948.CrossRefGoogle Scholar
Mumma, M.J., Weaver, H.A., Larson, H.P., Davis, D.S. and Williams, M.: 1986, “Detection of water vapor in Halley's comet.” Science, 232, 15231528.CrossRefGoogle Scholar
Mumma, M.J., Weissman, P.R., and Stern, S.A.: 1993b, “Comets and the origin of the solar system: reading the Rosetta stone.” In Protostars and Planets III (Levy, E.H., Lunine, J.I, Eds.), 11771252, University of Arizona Press, Tucson.Google Scholar
Prialnik, D.: 1994, “Modelling the structure and activity of comet nuclei.” This volume.Google Scholar
Reuter, D.C.: 1992, “The contribution of methanol to the 3.4 μm emission feature in comets.” Astrophys. J., 386, 330335.Google Scholar
Reuter, D.C., Hoban, S. and Mumma, M.J.: 1992, “An infrared search for formaldehyde in several comets.” Icarus, 95, 329332.Google Scholar
Rickman, H.: 1994, “Comet nuclei.” This volume.Google Scholar
Schleicher, D.G.: 1994, “Comet taxonomy and evolution.” This volume.Google Scholar
Schleicher, D.G., Bus, S.J., Osip, D.J.: 1993, “The anomalous molecular abundances of comet P/Wolf-Harrington.” Icarus, 104, 157166.Google Scholar
Schloerb, F.P. and Ge, W.: 1992, “Submillimeter line observations of comet Levy (1990c).” In Asteroids, Comets, Meteors 1991, (Harris, A.W., Bowell, E., Eds.), 533536, Lunar and Planetary Institute, Houston.Google Scholar
Smyth, W.A., Wolstencroft, R.D. and Lutz, B.L.: 1989, “The 2.4 micron spectrum of comet Halley: a search for H2 emission.” The Observatory, 109, 1923.Google Scholar
Snyder, L.E., Palmer, P. and de Pater, I.: 1989, “Radio detection of formaldehyde emission from comet Halley.” Astron. J., 97, 246253.Google Scholar
Stern, S.A., Green, J.C., Cash, W. and Cook, T.A.: 1992, “Helium and argon abundance constraints and the thermal evolution of comet Austin (1989c1).” Icarus, 95, 157161.Google Scholar
Tokunaga, N.T., Nagata, T. and Smith, R.G.: 1987, “Detection of a new emission band at 2.8 μm in comet P/Halley.” Astron. Astrophys., 187, 519522.Google Scholar
Ulich, B.L. and Conklin, E.K.: 1974, “Detection of methyl cyanide in comet Kohoutek.” Nature, 248, 121122.Google Scholar
Weaver, H.A., Feldman, P.D., McPhate, J.B. et al. : 1994, “Detection of CO Cameron band emission in comet P/Hartley 2 (1991 XV) with the Hubble Space Telescope.” Astrophys. J., in press.Google Scholar
Weaver, H.A. and Mumma, M.J.: 1984, “Infrared molecular emissions from comets.” Astrophys. J., 276, 782797.Google Scholar
Weaver, H.A., Mumma, M.J. and Larson, H.P.: 1991, “Infrared spectroscopy of cometary parent molecules.” In Comets in the Post-Halley Era (Newburn, R.L. Jr., Neugebauer, M., Rahe, J., Eds.), 93106, Kluwer, Dordrecht.Google Scholar
Weaver, H.A., Mumma, M.J., Larson, H.P. and Davis, D.S.: 1986, “Post-perihelion observations of water in comet Halley.” Nature, 324, 441444.Google Scholar
West, R.M., Hainaut, O. and Smette, A.: 1991, “Post-perihelion observations of P/Halley. III. An outburst at r = 14.3 AU.” Astron. Astrophys. Lett., 246, L77L80.Google Scholar
Womack, M., Wickoff, S. and Ziurys, L.M.: 1992, “Observational constraints on solar nebula nitrogen chemistry: N2/NH3.” Astrophys. J., 401, 728735.CrossRefGoogle Scholar
Wootten, A., Latter, W. and Despois, D.: 1994, “HCN emission from comet P/Swift-Tuttle.” Planet. Space Sci., in press.Google Scholar
Wyckoff, S.W., Tegler, S.C. and Engel, L.: 1991a, “Nitrogen abundance in comet Halley.” Astrophys. J., 367, 641648.Google Scholar
Wyckoff, S.W., Tegler, S.C. and Engel, L.: 1991b, “Ammonia abundances in four comets.” Astrophys. J., 368, 279286.CrossRefGoogle Scholar
Yamamoto, T.: 1982, “Evaluation of infrared line emission from constituent molecules of cometary nuclei.” Astron. Astrophys., 109, 326330.Google Scholar
Yamamoto, T.: 1991, “Chemical theories on the origin of comets.” In Comets in the Post-Halley Era (Newburn, R.L. Jr., Neugebauer, M., Rahe, J., Eds.), 361376, Kluwer, Dordrecht.Google Scholar