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Evidence of Surface Catalytic Effect on Cosmic Dust Grain Analogs: The Ammonia and Carbon Dioxide Surface Reaction

  • Authors: Alexey Potapov, Patrice Theulé, Cornelia Jäger, and Thomas Henning

2019 The Astrophysical Journal Letters 878 L20.

  • Provider: AAS Journals

Caption: Figure 2.

IR spectra taken after the deposition of a NH3:CO2 4:1 mixture (200 nm thickness) on carbon grains at 15 K and after 4 hr of the title reaction at 80 K. Two bands related to ﹩{{\mathrm{NH}}_{4}}^{+}﹩NH2COO are marked by asterisks. The 15 K spectrum is vertically shifted for clarity. Inset: the time dependence of the ﹩{{\mathrm{NH}}_{4}}^{+}﹩NH2COOcolumn density calculated from the 1550 cm−1 band derived from the isothermal kinetic experiments performed with NH3:CO2 4:1 ices (200 nm thickness) on carbon grains at 80 K.

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