Abstract
For the last 10 years, many experimental results have been obtained on the chemical and physical changes induced by ion and electron irradiation of materials relevant to comets. Those results are reviewed here, together with their physical interpretation and their relevance for cometary astrophysics. Cometary material is, from the time of its origin, altered by the large amount of energy deposited by energetic ions. Four phases of the irradiation history are considered: the pre-cometary phase, during which interstellar dust is bombarded by cosmic-ray ions; the accretion phase, during which comets are built up, possibly in an environment rich in fast ions (T-Tau phase); the cometary phase, during which the outer layers of the comets are irradiated by galactic ions in the Oort cloud; and the post-cometary phase, during which dust, lost from the comet, is bombarded by solar ions.
The relevant applications of laboratory results are reviewed. In particular, the ability of ion irradiation of simple carbon-containing ices to produce complex refractory organic materials is discussed. In the Oort cloud, this process can occur several meters into the surface, so that the buildup of a stable organic crust may occur. A comparison of ion irradiation at various stages is also made with other models for the production of organics.
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References
Allen, D.A., and Wickramasinghe, D.T. (1987). ‘Discovery of organic grains in comet Wilson’. Nature 329, 615–616.
Andersen, H.H., and Bay, H.L. (1981). ‘Sputtering yield measurements’. In Sputtering by Particle Bombardment I, R. Behrisch (ed.), Springer-Verlag, Berlin, pp. 145–218.
Andronico, G., Baratta, G.A., Spinella, F., and Strazzulla, G. (1987). ‘Optical evolution of laboratory-produced organics: Applications to Phoebe, Iapetus, outer belt asteroids and cometary nuclei’. Astron. Astrophys. 184, 333–336.
Baas, F., Geballe, T.R., and Walther, D.M. (1986). ‘Spectroscopy of the 3.4 micron emission feature in comet Halley’. Astrophys. J. Lett. 311, L97–L101.
Betz, G., and Wehner, G.K. (1983). ‘Sputtering of multicomponent materials’. In Sputtering by Particle Bombardment II, R. Behrisch (ed.), Springer-Verlag, Berlin, pp. 11–90.
Boring, J.W., Nansheng, Z., Chrisey, D.B., O’Shaughnessey, D.J., Phipps, J.A., and Johnson, R.E. (1985). ‘The production of S2 by keV ion bombardment’. In Asteroids, Comets and Meteors II, C.I. Lagerkvist, B.A. Lindblad, H. Lundstedt, and H. Rickman (eds.), University of Uppsala Press, Uppsala, pp. 229–234.
Bradley, J.P., Brownlee, D.E., and Fraundorf, P. (1984). ‘Discovery of nuclear tracks in interplanetary dust’. Science 226, 1432–1434.
Bregman, J.D., et al. (1987). ‘Airborne and ground based spectrophotometry of comet P/Halley from 5–13 micrometers’. Astron. Astrophys, 187, 616–620.
Brown, W.L., and Johnson, R.E. (1986). ‘Sputtering of ices: A review’. Nucl. Instr. and Meth. B13, 295–303.
Brown, W.L., Augustyniak, W.M., Lanzerotti, L.J., Johnson, R.E., and Evatt, R. (1980). ‘Linear and non linear processes in the erosion of H2O ice by fast light ions’. Phys. Rev. Lett. 45, 1632–1635.
Brown, W.L., Lanzerotti, L.J., and Johnson, R.E. (1982a). ‘Fast ion bombardment of ices and its astrophysical implications’. Science 218, 525–531.
Brown, W.L., Augustyniak, W.M., Simmons, E., Marcantonio, K.J., Lanzerotti, L.J., Johnson, R.E., Boring, J.W., Reimann, C.T., Foti, G., and Pirronello, V. (1982b). ‘Erosion and molecular formation in condensed gas films by electronic energy loss of fast ions’. Nucl. Instr. Methods 198, 1–8.
Brown, W.L., Foti, G., Lanzerotti, L.J., Bower, J.E., and Johnson R.E. (1987). ‘Delayed emission of hydrogen from ion bombardment of solid methane’. Nucl. Instr. Methods B19/20, 899–902.
Chrisey, D.B., Boring, J.W., Johnson, R.E., and Phipps, J.A. (1988). ‘Molecular ejection from low temperature sulfur by keV ions’. Surf. Sci. 195, 594–618.
Chrisey, D.B., Brown, W.L., and Boring J.W. (1989). ‘Electronic excitation of condensed CO: Sputtering and chemical change’. Surf. Sci., in press.
Chyba, C., and Sagan, C. (1987). ‘Infrared emission by organic grains in the coma of comet Halley’. Nature 330, 350–353.
Chyba, C., and Sagan, C. (1988). ‘Cometary organic matter still a contentious issue’. Nature 332, 592.
Combes, M., et al. (1986). ‘Infrared sounding of comet Halley from Vega 1’. Nature 321, 266–268.
Combi, M.R. (1987). ‘Sources of cometary radicals and their jets: Gases or grains’. Icarus 71, 178–191.
Cosmovici, C., and Ortolani, S. (1984). ‘Detection of new molecules in the visible spectrum of comet IRAS-Araki-Alcock (1984)’. Nature 310, 122–124.
de Jong, T., and Kamijo F., (1973). ‘Growth and destruction of interstellar grains in the presence of low-energy cosmic rays’. Astron. Astrophys. 25, 363–370.
Donn, B. (1976). ‘The nucleus: Panel discussion’. In The Study of Comets, B. Donn et al. (eds.), NASA SP-393, pp. 611–621.
Donn, B., and Hughes, D. (1986). ‘A fractal model of a cometary nucleus formed by random accretion’. ESA SP-250, vol. III, pp. 523–524.
Draganic, I.G., Draganic, Z.D., and Vujosevic, S.I. (1984). ‘Some radiation-chemical aspects of chemistry in cometary nuclei’. Icarus 60, 464–475.
Fechtig, H., and Mukai, T. (1985). ‘Dust of variable porosities (densities) in the Solar System’. In Ices in the Solar System, J. Klinger et al. (eds.), D. Reidel Publ. Co., Dordrecht, pp. 251–259.
Feigelson, E.D. (1982). ‘X-ray emission from young stars and implications for the early Solar System’. Icarus 51, 155–163.
Field, G.B., Goldsmith, D.W., and Habing, H.J. (1969). ‘Cosmic-ray heating of interstellar gas’. Astrophys. J. Lett. 155, L149–L154.
Foti, G., Calcagno, L., Sheng, K.L., and Strazzulla, G. (1984). ‘Micrometre-sized polymer layers synthesized by MeV ions impinging on frozen methane’. Nature 310, 126–128.
Foti, G., Calcagno, L., Zhu, F.Z., and Strazzulla, G. (1987). ‘Chemical evolution of solid methane by keV ion bombardment’. Nucl. Instr. Methods in Phys. Res. B24–25, 522–525.
Gombosi, T.I., and Houpis, H.L.F. (1986). ‘An icy-glue model of cometary nuclei’. Nature 324, 43–44.
Greenberg, J.M. (1982). ‘What are comets made of? A model based on interstellar dust’. In Comets, L.L. Wilkening (ed.), University of Arizona Press, Tucson, pp. 131–163.
Greenberg, J.M., and Zhao, N. (1988). ‘Cometary organics’. Nature 331, 124.
Hanner, M.S., Knacke, R., Sekanina, Z., and Tokunaga, A.T. (1985). ‘Dark grains in comet Crommelin’. Astron. Astrophys. 152, 177–181.
Haring, R.A., Haring A., Klein, F.S., Kummel, A.C., and de Vries, A.E. (1983). ‘Reactive sputtering of simple condensed gases by keV heavy ion bombardment’. Nucl. Instrum. Methods 211, 529–538.
Harris, A.W. (1978). ‘Dynamics of planetesimals formation and planetary accretion’. In the Origin of the Solar System, S.F. Dermott (ed.), Wiley, New York, pp. 469–492.
Hart, E.J., and Platzman, R.L. (1961). ‘Radiation chemistry’ In Physical Mechanisms in Radiation Biology 1, Academic Press, New York, pp. 93–120.
Hoyle, F., and Wickramasinghe, N.C. (1985). Living Comets. University College Press, London.
Hoyle, F., and Wickramasinghe, N.C. (1987). ‘Organic dust in comet Halley’. Nature 328, 117.
Huebner, W.F. (1987). ‘First polymer in space identified in Comet Halley’. Science 237, 628–630.
Jessberger, E.K., Cristoforidis, A., and Kissel, J. (1988). ‘Aspects of the major element composition of Halley’s dust’. Nature 332, 691–695.
Johnson, R.E. (1985). ‘Comment on the evolution of interplanetary grains’. In Ices in the Solar System, J. Klinger et al. (eds.), D. Reidel Publ. Co., Dordrecht, pp. 337–339.
Johnson, R.E. (1989a). Energetic Charged-Particle Interactions With Atmospheres and Surfaces. Springer-Verlag, Berlin, in press.
Johnson, R.E. (1989b). ‘Laboratory simulations: The primordial comet mantle’. In the NASA publication for the Comet Sample Return Conference, Milipitas, 1989, in press.
Johnson, R.E., and Lanzerotti, L.J. (1986). ‘Ion bombardment of interplanetary dust’. Icarus 66, 619–624.
Johnson, R.E., Lanzerotti, L.J., Brown, W.L., Augustyniak, W.M., and Mussil, C. (1983). ‘Charged particle erosion of frozen volatiles in ice grains and comets’. Astron. Astrophys. 123, 343–346.
Johnson, R.E., Lanzerotti, L.J., and Brown, W.L. (1984). ‘Sputtering processes: Erosion and chemical change’. Adv. Space Res. 4, 41–51.
Johnson, R.E., Barton, L.A., Boring, J.W., Jesser, W.A., Brown, W.L., and Lanzerotti, L.J. (1985). ‘Charged particle modification of ices in the Jovian and Saturnian systems’. In Ices in the Solar System, J. Klinger et al. (eds.), D. Reidel Publ. Co., Dordrecht, pp. 301–316.
Johnson, R.E., Cooper, J.F., Lanzerotti, L.J., and Strazzulla, G. (1987). ‘Radiation formation of a non-volatile comet crust’. Astron. Astrophys. 187, 889–892.
Jull, A.J.T., Wilson, G.C., Long, J.V.P., Reed, S.J.B., and Pillinger, C.T. (1980). ‘Sputtering rates of minerals and implications for abundances of solar elements in lunar samples’. Nucl. Instr. Methods 168, 357–365.
Khare, B.N., Sagan, C., Arakawa, E.T., Suits, F., Calcott, T.A., and Williams, M.W. (1984). ‘Optical constants of organic tholins produced in a simulated Titanian atmosphere from X-ray to microwave frequencies’. Icarus 60, 127–137.
Kissel, J., and Krueger, F.R. (1987a). ‘The organic component in dust from comet Halley as measured by the PUMA mass spectrometer on board Vega 1’. Nature 326, 755–760.
Kissel, J., and Krueger, F.R. (1987b). ‘Organic dust in comet Halley’. Nature 328, 117.
Kissel, J., et al. (1986a). ‘Composition of comet Halley dust particles from Vega observations’. Nature 321, 280–282.
Kissel, J., et al. (1986b). ‘Composition of comet Halley dust particles from Giotto observations’. Nature 321, 336–337
Knacke, R.F., Brooke, T.Y., and Joyce, R.R. (1987). ‘The 3.2–3.6 µm emission features in comet P/Halley: Spectral identification and similarities’. Astron. Astrophys. 187, 625–628.
Lanzerotti, L.J., Brown, W.L., Poate, C.M., and Augustyniak, W.M. (1978). ‘Low energy cosmic ray erosion of ice grains in interplanetary and interstellar media’. Nature 272, 431–433.
Lanzerotti, L.J., Brown, W.L., and Johnson, R.E. (1985). ‘Laboratory studies of ion irradiation of water, sulfur dioxide, and methane ices’. In Ices in the Solar System, J. Klinger et al. (eds.), D. Reidel Publ. Co., Dordrecht, pp. 317–333.
Lanzerotti, L.J., Brown, W.L., and Marcantonio, K.J. (1987). ‘Experimental study of erosion of methane ice by energetic ions and some considerations for astrophysics’. Astrophys. J. 313, 910–922.
Leger, A., Jura, M., and Amont, A. (1985). ‘Desorption from interstellar grains’. Astron. Astrophys. 144, 147–160.
Le Sergeant d’Hendecourt, L.B., and Lamy, Ph. L. (1980). ‘On the size distribution and physical properties of interplanetary dust grains’. Icarus 43, 350–372.
Littmark, U., and Ziegler, J.F. (1980). Handbook of Range Distributions for Energetic Ions in All Elements. Pergamon, Elmsford, New York.
Mazzoldi, P., and Arnold, G.W. (1987). Ion Beam Modification of Insulators. Elsevier, Amsterdam.
Melcher, C.L., LePoire, D.J., Cooper, B.H., and Trombello, T.A. (1982). ‘Erosion of frozen sulfur dioxide by ion bombardment: Application to Io’. Geophys. Res. Lett. 9, 1151–1154.
Mitchell, D.L. et al. (1987). ‘Evidence for chain molecules enriched in carbon, hydrogen and oxygen in comet Halley’. Science 237, 626–628.
Moore, M.H. (1982). ‘Studies of proton-irradiated cometary-type ice mixtures’. Ph.D. thesis, University of Maryland, College Park, Maryland.
Moore, M.H., and Donn, B. (1982). ‘The infrared spectrum of a laboratory synthesized residue: Implication for the 3.4 µm interstellar absorption feature’. Astrophys. J. 257, L47–L50.
Moore, M.H., Donn, B., Khanna, R., and A’Hearn, M.F. (1983). ‘Studies of protonirradiated cometary-type ice mixtures’. Icarus 54, 388–405.
Moroz, V.I., et al. (1987). ‘Detection of parent molecules in comet P/Halley from IKS-Vega experiment’. Astron. Astrophys. 187, 513–518.
Mukai, T., and Schwehm, G. (1981). ‘Interaction of grains with the solar energetic particles’. Astron. Astrophys. 95, 373–382.
Mumma, M.J., Blass, W.E., Weaver, H.A., and Larson, H.P. (1989). ‘Measurements of the ortho-para ratio and the nuclear spin temperatures of water vapour in comet Halley and Wilson (1986i) and the implication for their origin and evolution’. Submitted.
O’Shaughnessy, D.J., Boring, J.W., Philipps, J.A., Johnson, R.E., and Brown, W.L. (1986). ‘Sputtering of rare gas solids by keV ions’. Nucl. Instr. and Meth. B13, 304–308.
Pirronello, V., and Lanzafame, G. (1989). ‘Molecules synthesized by cosmic rays in cometary nuclei: A tool to estimate their low energy spectrum’. Astrophys. J., in press.
Pirronello, V., Brown, W.L., Lanzerotti, L.J., Marcantonio, K.J., and Simmons, E. (1982). ‘Formaldehyde formation in a H2O/CO2 ice mixture under irradiation by fast ions’. Astrophys. J. 262, 636–640.
Pirronello, V., Strazzulla, G., Foti, G., Brown, W.L., and Lanzerotti, L.J. (1984). ‘Formaldehyde formation in cometary nuclei’. Astron. Astrophys. 134, 204–206.
Prialnik, D., and Bar-Nun, A. (1988). ‘The formation of a permanent dust mantle and its effect on cometary activity’. Icarus 74, 272–283.
Reimann, C.T., Boring, J.W., Johnson, R.E., Garret, J.W., Farmer, K.R. and Brown, W.L. (1984). ‘Ion-induced molecular ejection from D2O ice’. Surf. Sci. 147, 227–240.
Rickman, H. (1986). ‘Masses and densities of comets Halley and Kopff’. In The Comet Nucleus Sample Return Mission, ESA SP-249, pp. 195–205.
Rickman, H. (1987). ‘Physical evolution of comets’. In Proc. 10th European Astronomy Meeting of the IAU, Prague 1987.
Rickman, H., and Fernandez, J.A. (1986). ‘Formation and blowoff of a cometary dust mantle’. In The Comet Nucleus Sample Return Mission, ESA SP-249, pp. 185–195.
Ryan, M.P., Jr., and Draganic, I.G. (1986). ‘An estimate of the contribution of high energy cosmic-ray protons to the absorbed dose inventory of a cometary nucleus’. Astrophys. Space. Sci. 125, 49–68.
Sack, N., Schuster, R., Hoffman, A., and Schneider, H.J. (1988). ‘Production of amines by proton bombardment of simple condensed gases’. Icarus 76, 110–117.
Sagdaeev, R.Z., Elyasberg, P.E., and Moroz, V.I. (1988). ‘Is the nucleus of comet Halley a low density body?’ Nature 331, 240–242.
Stern, S.A. (1988). ‘Collisions in the Oort cloud’. Icarus 73, 499–507.
Stern, S.A., and Shull, M.J. (1988). ‘The relevance of supernovas and passing stars on comets’. Nature 332, 407–411.
Strazzulla, G. (1985). ‘Modifications of grains by particle bombardment in the early Solar System’. Icarus 61, 48–56.
Strazzulla, G. (1986). ‘“Primitive” galactic dust in the Solar System?’ Icarus 67, 63–70.
Strazzulla, G. (1988). ‘Ion bombardment: Techniques, materials and applications’. In Experiments on Cosmic Dust Analogues, E. Bussoletti et al. (eds.), Kluwer Acad. Publ., Dordrecht, pp. 103–113.
Strazzulla, G., Calcagno, L., and Foti, G. (1983a). ‘Polymerization induced on interstellar grains by low energy cosmic rays’. M.N.R.A.S. 204, 59p–62p.
Strazzulla, G., Pirronello, V., and Foti, G. (1983b). ‘Physical and chemical effects induced by energetic ions on comets’. Astron. Astrophys. 123, 93–97.
Strazzulla, G., Calcagno, L., and Foti, G. (1984). ‘Build up of carbonaceous material by fast protons on Pluto and Triton’. Astron. Astrophys. 140, 441–444.
Strazzulla, G., Calcagno, L., Foti, G., and Sheng, K.L. (1985). ‘Interaction between solar energetic particles and interplanetary grains’. In Ices in the Solar System, J. Klinger et al. (eds.), D. Reidel Publ. Co., Dordrecht, pp. 73–285.
Strazzulla, G., Torrisi, L., and Foti, G. (1988). ‘Light scattering from ion irradiated frozen gases’. Europhys Lett. 7(5), 431–434.
Tokunaga, A.T., Nagata, T., and Smith, R.G. (1987). ‘Detection of a new emission band at 2.8µm in comet P/Halley’. Astron. Astrophys. 187, 519–522.
Torrisi, L., Coffa, S., Foti, G., and Strazzulla, G. (1986). ‘Sulphur erosion by 1.0 MeV helium ions’. Radiation Eff. 100, 61–69
Torrisi, L., Coffa, S., Foti, G., Johnson, R.E., Chrisey, D.B., and Boring, J.W. (1988). ‘Threshold dependence in the electronic sputtering of condensed sulfur’. Phys. Rev. B 38, 1516–1519.
Vanysek, M.K., and Wickramasinghe, N.C. (1975). ‘Formaldehyde polymers in comets’. Astrophys. Space Sci. 33, L19–L28.
Watson, W.D. (1975). ‘Physical processes for the formation and destruction of interstellar molecules’. In Atomic and Molecular Physics and the Interstellar Matter, R. Balian et al. (eds.), North Holland Publ. Co., Amsterdam, pp. 177–271.
Weissman, P.R. (1986). ‘Are cometary nuclei primordial rubble piles?’ Nature 320, 242–244.
Whipple, F.L. (1950). ‘A comet model: The acceleration of comet Encke’. Astrophys. J. 111, 375–394.
Whipple, F.L. (1972). ‘The origin of comets’. In The Motion, Evolution of Orbits and Origin of Comets, IAU Symp. 45, D. Reidel Publ. Co., Dordrecht, pp. 401–408.
Whipple, F.L. (1977). ‘The constitution of cometary nuclei’. In Comets, Asteroids, Meteorites: Interrelations, Evolution and Origins, A.H. Delsemme (ed.), University of Toledo, Toledo, Ohio, pp. 25–32.
Wickramasinghe, D.T., and Allen, D.A. (1986). ‘Discovery of organic grains in comet Halley’. Nature 323, 44–46.
Wood, J.A. (1986). ‘Comet nucleus models: A review’. In The Comet Nucleus Sample Return Mission, ESA SP-249, pp. 123–131.
Worden, S.P., Schneeberger, T.J., Kuhn, J.R., and Africano, J.L. (1981). ‘Flare activity of T Tauri stars’. Astrophys. J. 244, 520–527.
Yamamoto, T., Nakagawa, N., and Fukui, Y. (1983). ‘The chemical composition and thermal history of the ice of a cometary nucleus’. Astron. Astrophys. 122, 171–176.
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Strazzulla, G., Johnson, R.E. (1991). Irradiation Effects on Comets and Cometary Debris. In: Newburn, R.L., Neugebauer, M., Rahe, J. (eds) Comets in the Post-Halley Era. Astrophysics and Space Science Library, vol 167. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-3378-4_11
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