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.
| Language | English |
|---|---|
| Title of host publication | Highlights of astronomy |
| Editors | O Engvold |
| Place of Publication | San Francisco |
| Pages | 491-494 |
| Number of pages | 4 |
| Volume | 13 |
| Publication status | Published - 2005 |
| Event | 25th General Assembly of the International-Astronomical-Union - Sydney, Australia Duration: 13 Jul 2003 → 26 Jul 2003 |
Publication series
| Name | IAU Symposia |
|---|---|
| Publisher | Astronomical Soc Pacific |
| Volume | 13 |
| ISSN (Print) | 0074-1809 |
Conference
| Conference | 25th General Assembly of the International-Astronomical-Union |
|---|---|
| Country | Australia |
| City | Sydney |
| Period | 13/07/03 → 26/07/03 |
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Keywords
- ice morphology
- comet formation
- implications
Cite this
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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 proceeding › Conference contribution book
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.
KW - ice morphology
KW - comet formation
KW - implications
M3 - Conference contribution book
SN - 1583811893
VL - 13
T3 - IAU Symposia
SP - 491
EP - 494
BT - Highlights of astronomy
A2 - Engvold, O
CY - San Francisco
ER -