Table 5
Effect of each parameter on CO and H2O snowline locations.
| Parameter | CO snowline | H2O snowline | ||
|---|---|---|---|---|
| Molecular distribution | Simulated emission | Molecular distribution | Simulated emission | |
| Chemical effects | ||||
| Binding energy | ✓ | ✓(a) | ✓ | ✓(a) |
| Physical effects | ||||
| Effective temperature Teff | ✕ | ✕ | ✕ | ✕ |
| Luminosity Lcen | ✓ | ✓ | ✓ | ✓ |
| Envelope density ρenv | ✓ | ✓ | ✓ | ✓ |
| Outflow cavity opening angle Θoutflow | ✕ | ✕ | ✕ | ✕ |
| Disk geometry | ||||
| Radius Rdisk | ✓ | ✓ | ✕(b) | ✓(b) |
| Mass Mdisk | ✓ | ✓ | ✕(b) | ✓(b) |
| Scale height H0 | ✓ | ✓ | ✕(b) | ✕(b) |
| Density ρdisk | ✓ | ✓ | ✕(b) | ✓(b) |
| Observational effects | ||||
| Spatial resolution | ✕ | ✓ | ||
| Inclination i | ✕ | ✓ | ||
Notes. (a)High spatial resolution is needed to detect the shift, and to differentiate it from other effects. (b)The presence of a disk in the cloud core, and its geometry, constrain the extent of the region where water is in the gas phase, particularly in the radial direction. In the molecular distribution models the presence of the disk does not significantly change the water snowline location. However, the geometry of the disk affects the observability and measurability of the H2O snowline location.
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