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SUMMARY:Gravitation\, Condensation\, Deuteration\, Star Formation (or how 
 to piece together the chemical and physical influences thereof!) - Helen F
 raser (University of Strathclyde)
DTSTART:20110201T163000Z
DTEND:20110201T173000Z
UID:TALK29611@talks.cam.ac.uk
CONTACT:David Titterington
DESCRIPTION:The detailed chemical processes occurring in star-forming regi
 ons in our own galaxy and extra-galactic sources are key to the generation
  of molecules in these regions\, which in turn are our windows (through ob
 servational spectroscopy) on the key factors influencing star-formation\, 
 such as turbulent mixing\, gravitational collapse\, chemical evolution and
  magnetic support\, which all occur over similar length and time-scales.  
 Since the largest molecular reservoir in such regions is actually the cond
 ensed matter on interstellar dust grains (known as 'ice')\, my research fo
 cuses on the chemical and physical attributes of ices in star forming regi
 ons.\n\nIn this talk I'll show a range of recent results on interstellar i
 ce studies in the laboratory - covering deuteration of H2O in space (via s
 urface reactions of D+H2O / D+CH3OH and CD3Od +H2O)\, the formation of CO2
  'ice' via surface reactions with OH radicals\, the 'sticky' properties of
  interstellar ice\, and how this relates to the earliest stages of planet 
 formation (as tested under microgravity conditions)\; theoretical studies 
 of ice formation - using molecular dynamics codes to study the formation o
 f porous ices and understand the hydrogen bonding in such systems\, and re
 cent observational data on ice mapping\, showing that the distribution of 
 ices in interstellar space is perhaps more closely related to the phyical 
 motion rather than the chemical soup of a particular star-forming clump.
LOCATION:Martin Ryle Seminar Room\, Kavli Building
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