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Acceleration of ion recombination reaction rates in cold dark clouds through spontaneous polarization charge on CO ice mantles

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  • Andrew Cassidy
  • Alexander Rosu-Finsen, UCL, University of London, University College London, Dept Chem, Storbritannien
  • Jérôme Lasne, Department of Integrated Structural Biology, IGBMC (Institute of Genetics and of Molecular and Cellular Biology), Centre National de la Recherche Scientifique (CNRS) UMR 7104/Institut National de la Santé de la Recherche Médicale (INSERM) U964/Université de Strasbourg, Storbritannien
  • Martin R. S. McCoustra, Heriot-Watt University, Storbritannien
  • David Field
We propose a role for CO ice mantles in ion recombination reactions, and demonstrate how the subsequent fall in the degree of gas phase ionization decreases the time required for cloud collapse under gravity by a factor of 5-6. Experimental results demonstrate that CO films prepared at cryo-temperatures spontaneously harbour electric fields immediately upon growth. Using what is known from observations about prestellar cloud conditions in the ISM, we explain how this phenomenon can lead to an acceleration in ion recombination reaction rates. The result is a pathway for cloud collapse to occur before cloud disruption by supernova remnants.
OriginalsprogEngelsk
TidsskriftProceedings of the International Astronomical Union
Vol/bind15
NummerS350
Sider (fra-til)390-391
Antal sider2
ISSN1743-9213
DOI
StatusUdgivet - 2020

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