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Table 3
Ice column estimates.
| CO column density from submillimeter measurements by Harjunpää et al. (2004) | ||||||
| ice mass | ||||||
| isotop | N(isotop) × 10-14 | abundance × 102 | @AJ | CO gas | CO total | expected |
|
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| [cm-2] | column density [μ g cm-2] | |||||
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| AJ = 3.57 as for pos A12 Harjunpää et al. (2004) | ||||||
| 13CO gas | 45.0 | 1.108 | 3.57 | 19 | ||
| 13CO total | 108.6 | 1.108 | 3.57 | 46 | 27 | |
| AJ = 3.45 as for sightline towards #947 | ||||||
| 13CO gas | 43.5 | 1.108 | 3.45 | 18 | ||
| 13CO total | 105.0 | 1.108 | 3.45 | 44 | 26 | |
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| AJ = 3.57 as for pos A12 Harjunpää et al. (2004) | ||||||
| C18O gas | 11.0 | 0.204 | 3.57 | 25 | ||
| C18O total | 14.5 | 0.204 | 3.57 | 33 | 8 | |
| AJ = 3.45 as for sightline towards #947 | ||||||
| C18O gas | 10.6 | 0.204 | 3.45 | 24 | ||
| C18O total | 14.0 | 0.204 | 3.45 | 32 | 8 | |
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| ice column density using laboratory band strength measurements by Gerakines et al. (1995) | ||||||
| ice | bandstrength × 1016 | ∫τ(ν) dν | N × 10-16 | ice mass | ||
| [cm] | [cm-1] | [cm-2] | column density [μ g cm-2] | |||
|
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| H2O ice | 2.00 | 100 | 61 | 15 | ||
| CO ice | 0.11 | 3.4 | 30 | 15 | ||
| CO2 ice | 0.11 | <3 | <30 | <20 | ||
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| ice coat and grain size distribution gained | ||||||
| from extinction measurements fitted to a modified MRN model | ||||||
| ice | refractive | ice mantle | volume × 106 | ice mass | ||
| indices | [Å] | [cm] | column density [μ g cm-2] | |||
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| H2O ice | Fig. 13a | 16 | 29 | 28 | ||
| CO ice | Fig. 15b | (mixture) 18 | 21 | 23 | ||
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| silicate band |
|
column density |  /volume) × 10-3 |
band width | ||
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| max(τsilicate) | volume × 106 | mass | ∫τ(ν) dν | |||
| [cm] | [μ g cm-2] | [cm-1] | [cm-1] | |||
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| #2 | 0.40 | 33 | 115 | 12 | 110 | |
| #947 | 0.45 | 44 | 150 | 10 | 110 | |
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