Layer
Name
Layer #1
Type of layer
granular
Texture
pulverulent
Type of porosity
porous
Comments
remainig H2O frost + PAH of the fully sublimated 0.67% PAAH mix in CO2 snow
Formation mode
by CO2 snow sublimation
Temperature
173.0  $\pm$ 2.0  $K$
Comments
the remainig H2O frost + PAH is the result of full sublimation of a mixture of 0.67% PAAH mix in CO2 snow. It comes from H2O impurities in CO2 snow and potential frost deposit on top of the initial CO2 snow layer
Number
4
Arrangement
heterogeneous mixing
Materials
  Name Arrangement Mass (g) Mass fraction Abundance comments
H2O frost as initial H2O in CO2 snow
Anthracene powder 0.3
Phenanthrene-d10 powder 0.3
Pyrene powder 0.3