Table 10
General properties of the structures present in W3 IRS4.
| Physical component | Molecules | ℓ | n(a) | T(a) | Δv(a) |
|---|---|---|---|---|---|
| (pc) | (cm−3) | (K) | (km s−1) | ||
| Clump/environment | 13CO, C18O, SO, H2CO, HC3N | 0.05−≥0.2 | <106(b) | 30−100 | 1.7−10.0 |
| Filament and cold cores | DCN, H2CO, HC3N, E-CH3OH | ≥0.09 × 0.01−0.04 | 106−107 | 20−70 | 1.7−4.0 |
| Outflow/shocks | 13CO, SO, DCN(c), c-C3H2, HC3N(c) | 0.01−≥0.1 | <106(b) | ~30−150 | 3.5−7.0 |
| PDR/UV-illuminated gas | 13CO, C18O, SO, H2CO, c-C3H2 | 0.055−0.15 | <106(b) | −(d) | 4.0−10.0 |
| Hot core | 33SO, OCS, SO2, 33SO2, 34SO2, SO2 v2 = 1, H2CO, H CO, HNCO, H2 CCO (e), t−HCOOH (e), HC3 N, HC3 N v7 = 1 (f), E−CH3 OH, A−CH3 OH vt = 1 (f), CH3 CN, NH2 CHO (e), CH3 OCHO (f), CH3 COCH3 (f) |
≲ 0.01 | 106 −107 | ~100−250 | 3.0–6.0 |
Notes. (a) Approximate based on maps of N[H2] from the continuum and XCLASS fitting results. (b)An upper limit outside the filament due to lack of continuum detection and uncertainty about the depth along the line of sight. (c) Detected near the continuum detection in the outflow but could be associated with colder material behind the cavity wall instead. (d) No information due to lack of detection in multiple transitions of any species in this region. (e) Tentative identification due to only one detected in one transition, though probably ok as other alternatives ruled out. (f) Detected in multiple transitions.
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