Implications of ice morphology for comet formation

Collings, M. P. and Dever, J. W. and McCoustra, M. R. S. and Fraser, H. J.; Engvold, O, ed. (2005) Implications of ice morphology for comet formation. In: Highlights of astronomy. IAU Symposia, 13 . ASTRONOMICAL SOC PACIFIC, AUS, pp. 491-494. ISBN 1583811893

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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  Item type:	Book Section
  ID code:	34233
  Dates:	Date Event 2005 Published
  Subjects:	Science > Physics
  Department:	Faculty of Science > Physics
  Depositing user:	Pure Administrator
  Date deposited:	21 Nov 2011 15:58
  Last modified:	11 Nov 2024 14:45
  URI:	https://strathprints.strath.ac.uk/id/eprint/34233