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

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.

Original languageEnglish
Title of host publicationHIGHLIGHTS OF ASTRONOMY, VOL 13
EditorsO Engvold
Place of PublicationSAN FRANCISCO
PublisherAstronomical Society of the Pacific
Pages491-494
Number of pages4
ISBN (Print)1-58381-189-3
Publication statusPublished - 2005
Event25th General Assembly of the International-Astronomical-Union - Sydney
Duration: 13 Jul 200326 Jul 2003

Conference

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

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). SAN FRANCISCO: Astronomical Society of the Pacific.
Collings, M. P. ; Dever, J. W. ; McCoustra, M. R. S. ; Fraser, H. J. / Implications of ice morphology for comet formation. HIGHLIGHTS OF ASTRONOMY, VOL 13. editor / O Engvold. SAN FRANCISCO : Astronomical Society of the Pacific, 2005. pp. 491-494
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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. Astronomical Society of the Pacific, SAN FRANCISCO, pp. 491-494, 25th General Assembly of the International-Astronomical-Union, Sydney, 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, VOL 13. ed. / O Engvold. SAN FRANCISCO : Astronomical Society of the Pacific, 2005. p. 491-494.

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

TY - GEN

T1 - Implications of ice morphology for comet formation

AU - Collings, M. P.

AU - Dever, J. W.

AU - McCoustra, M. R. S.

AU - Fraser, H. J.

PY - 2005

Y1 - 2005

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.

M3 - Conference contribution

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BT - HIGHLIGHTS OF ASTRONOMY, VOL 13

A2 - Engvold, O

PB - Astronomical Society of the Pacific

CY - SAN FRANCISCO

ER -

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: Astronomical Society of the Pacific. 2005. p. 491-494