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Table 6
Expected solid CO2 (upper limits) formed after cosmic ion irradiation of water ice onto carbon grains (Ioppolo et al. 2009) for some selected sources for which AV is known compared to the column density of CO2 in water ice as obtained by the fit.
| Source | CO2 from H2O on carbon grains + 200 keV H+ | |
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|
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| Expected CO2 column density (mol cm-2) | Obtained CO2 column density (fit) (mol cm-2) | |
| R Cr A IRS 5 | 3.41 × 1017 | 1.62 × 1017 |
| HH 46 IRS (IRAS 08242 -5050) | 3.26 × 1017 | 2.15 × 1017 |
| EC 90 (CK 1, SVS 20) | 1.58 × 1017 | 1.97 × 1016 |
| EC 118 (CK 2) | 4.28 × 1017 | 8.19 × 1017 |
| L 1489 IRS (IRAS 04016 +2610) | 2.70 × 1017 | 3.49 × 1016 |
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