Implications of ice morphology for comet formation

M. P. Collings, J. W. Dever, M. R. S. McCoustra, H. J. Fraser

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Abstract

Laboratory surface science under ultra-high vacuum (UHV) conditions allows us to simulate the growth of ices in astrophysical environments. Using the techniques of temperature programmed desorption (TPD), reflection-absorption infrared spectroscopy (RAIRS) and micro-balance methods, we have studied binary ice systems consisting of water (H2O) and variety of other species including carbon monoxide (CO), at astrophysically relevant conditions of temperature and pressure. We present results that demonstrate that the morphology of water ice has an important influence on the behavior of such systems, by allowing processes such as diffusion and trapping that can not be understood through a knowledge of the binding energies of the species alone. Through an understanding of the implications of water ice morphology on the behavior of ice mixtures in the interstellar environment, additional constraints can be placed on the thermodynamic conditions and ice compositions during comet formation.

LanguageEnglish
Title of host publicationHighlights of astronomy
EditorsO Engvold
Place of PublicationSan Francisco
Pages491-494
Number of pages4
Volume13
Publication statusPublished - 2005
Event25th General Assembly of the International-Astronomical-Union - Sydney, Australia
Duration: 13 Jul 200326 Jul 2003

Publication series

NameIAU Symposia
PublisherAstronomical Soc Pacific
Volume13
ISSN (Print)0074-1809

Conference

Conference25th General Assembly of the International-Astronomical-Union
CountryAustralia
CitySydney
Period13/07/0326/07/03

Fingerprint

comet
ice
atomic absorption spectroscopy
infrared spectroscopy
carbon monoxide
water
trapping
desorption
thermodynamics
temperature
energy

Keywords

  • ice morphology
  • comet formation
  • implications

Cite this

Collings, M. P., Dever, J. W., McCoustra, M. R. S., & Fraser, H. J. (2005). Implications of ice morphology for comet formation. In O. Engvold (Ed.), Highlights of astronomy (Vol. 13, pp. 491-494). (IAU Symposia; Vol. 13). San Francisco.
Collings, M. P. ; Dever, J. W. ; McCoustra, M. R. S. ; Fraser, H. J. / Implications of ice morphology for comet formation. Highlights of astronomy. editor / O Engvold. Vol. 13 San Francisco, 2005. pp. 491-494 (IAU Symposia).
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abstract = "Laboratory surface science under ultra-high vacuum (UHV) conditions allows us to simulate the growth of ices in astrophysical environments. Using the techniques of temperature programmed desorption (TPD), reflection-absorption infrared spectroscopy (RAIRS) and micro-balance methods, we have studied binary ice systems consisting of water (H2O) and variety of other species including carbon monoxide (CO), at astrophysically relevant conditions of temperature and pressure. We present results that demonstrate that the morphology of water ice has an important influence on the behavior of such systems, by allowing processes such as diffusion and trapping that can not be understood through a knowledge of the binding energies of the species alone. Through an understanding of the implications of water ice morphology on the behavior of ice mixtures in the interstellar environment, additional constraints can be placed on the thermodynamic conditions and ice compositions during comet formation.",
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Collings, MP, Dever, JW, McCoustra, MRS & Fraser, HJ 2005, Implications of ice morphology for comet formation. in O Engvold (ed.), Highlights of astronomy. vol. 13, IAU Symposia, vol. 13, San Francisco, pp. 491-494, 25th General Assembly of the International-Astronomical-Union , Sydney, Australia, 13/07/03.

Implications of ice morphology for comet formation. / Collings, M. P.; Dever, J. W.; McCoustra, M. R. S.; Fraser, H. J.

Highlights of astronomy. ed. / O Engvold. Vol. 13 San Francisco, 2005. p. 491-494 (IAU Symposia; Vol. 13).

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

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N2 - Laboratory surface science under ultra-high vacuum (UHV) conditions allows us to simulate the growth of ices in astrophysical environments. Using the techniques of temperature programmed desorption (TPD), reflection-absorption infrared spectroscopy (RAIRS) and micro-balance methods, we have studied binary ice systems consisting of water (H2O) and variety of other species including carbon monoxide (CO), at astrophysically relevant conditions of temperature and pressure. We present results that demonstrate that the morphology of water ice has an important influence on the behavior of such systems, by allowing processes such as diffusion and trapping that can not be understood through a knowledge of the binding energies of the species alone. Through an understanding of the implications of water ice morphology on the behavior of ice mixtures in the interstellar environment, additional constraints can be placed on the thermodynamic conditions and ice compositions during comet formation.

AB - Laboratory surface science under ultra-high vacuum (UHV) conditions allows us to simulate the growth of ices in astrophysical environments. Using the techniques of temperature programmed desorption (TPD), reflection-absorption infrared spectroscopy (RAIRS) and micro-balance methods, we have studied binary ice systems consisting of water (H2O) and variety of other species including carbon monoxide (CO), at astrophysically relevant conditions of temperature and pressure. We present results that demonstrate that the morphology of water ice has an important influence on the behavior of such systems, by allowing processes such as diffusion and trapping that can not be understood through a knowledge of the binding energies of the species alone. Through an understanding of the implications of water ice morphology on the behavior of ice mixtures in the interstellar environment, additional constraints can be placed on the thermodynamic conditions and ice compositions during comet formation.

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Collings MP, Dever JW, McCoustra MRS, Fraser HJ. Implications of ice morphology for comet formation. In Engvold O, editor, Highlights of astronomy. Vol. 13. San Francisco. 2005. p. 491-494. (IAU Symposia).