surface science investigations of the role of co 2 in astrophysical ices by john l. edridge, kati...

Surface science investigations of the role of CO2 in

astrophysical ices

by John L. Edridge, Kati Freimann, Daren J. Burke, and Wendy A. Brown

Philosophical Transactions AVolume 371(1994):20110578

July 13, 2013

©2013 by The Royal Society

TPD spectra for CO2 adsorbed on HOPG at 33 K.

John L. Edridge et al. Phil. Trans. R. Soc. A 2013;371:20110578

©2013 by The Royal Society

Simulated TPD spectra of a 0.3 μm thick 13% CO2:H2O ice using a heating rate of T=1.706×10−4×time1.289 [53], characteristic of the warming of a hot core near to a medium mass

star.

John L. Edridge et al. Phil. Trans. R. Soc. A 2013;371:20110578

©2013 by The Royal Society

TPD spectra for CO2 adsorbed on ASW on HOPG at 33 K.

John L. Edridge et al. Phil. Trans. R. Soc. A 2013;371:20110578

©2013 by The Royal Society

A comparison of TPD spectra recorded for equivalent doses of pure CO2 ice on HOPG (d), CO2 adsorbed on top of 100 L of ASW ice (c) and 100 L of a 15% CO2:H2O ice co-deposited mixture

(b).

John L. Edridge et al. Phil. Trans. R. Soc. A 2013;371:20110578

©2013 by The Royal Society

(a) RAIR spectra of a range of exposures of CO2 adsorbed on HOPG at 28 K.

John L. Edridge et al. Phil. Trans. R. Soc. A 2013;371:20110578

©2013 by The Royal Society

A comparison of RAIR spectra recorded for a range of CO2 ices adsorbed on HOPG at 30 K.

John L. Edridge et al. Phil. Trans. R. Soc. A 2013;371:20110578

©2013 by The Royal Society

TPD spectra recorded for desorption of an ice consisting of 20 L of CO2 adsorbed on top of 100 L of a 15% CH3OH:H2O mixed ice, adsorbed on HOPG at 33 K.

John L. Edridge et al. Phil. Trans. R. Soc. A 2013;371:20110578

©2013 by The Royal Society