Table 1
List of protostellar cores and their envelope properties.
| Name | T bol a | n H,0 a | r 0 a | r env a | α a | N H a |
a
|
N s - H2O | Water transition | ||||
| (K) | (cm-3) | (au) | (103 au) | (cm-2) | (cm-2) | (1018 cm-2) | o0 | p0 | p1 | p2 | |||
| L 1527 | 44 | 1.8(8) | 5.4 | 4.6 | 0.9 | 1.4(23) | 1.2(23) | 4.7±1.3d | • | • | • | • | |
| IRAS 15398 | 52 | 3.9(9) | 6.2 | 2.7 | 1.4 | 8.2(23) | 6.2(23) | 14.8±4.0b | • | • | • | • | |
| L1551-IRS5 | 94 | 1.4(9) | 28.9 | 14.1 | 1.8 | 7.4(23) | 4.4(23) | 10.9±0.2c | • | • | • | • | |
| TMC1 | 101 | 1.7(8) | 3.7 | 5.0 | 1.1 | 4.8(22) | 3.9(22) | 7.9±0.2c | • | • | • | ||
| HH 46 | 104 | 7.1(8) | 28.5 | 16.8 | 1.6 | 4.9(23) | 3.3(23) | 7.8±0.8b | • | • | • | • | |
| TMC1A | 118 | 1.0(9) | 7.7 | 6.7 | 1.6 | 2.0(23) | 1.3(23) | 5.3±0.2c | • | • | • | ||
| RCrA-IRS5 | 126 | 2.2(7) | 10.0 | 10.0 | 0.8 | 4.9(22) | 4.5(22) | 3.6±0.3b | • | ||||
| TMR1 | 133 | 8.2(8) | 8.8 | 6.8 | 1.6 | 1.8(23) | 1.2(23) | 7.4±0.3c | • | • | • | • | |
| L 1489 | 200 | 4.1(8) | 8.4 | 6.2 | 1.5 | 9.8(22) | 6.9(22) | 4.3±0.5b | • | • | • | • | |
| HH 100-IRS | 256 | 3.5(6) | 15.5 | 15.5 | 0.5 | 4.9(22) | 4.7(22) | 2.5±0.2b | • | ||||
| RNO 91 | 340 | 2.7(8) | 6.6 | 6.0 | 1.2 | 9.9(22) | 8.1(22) | 4.2±0.4b | • | • | • | • | |
Notes. The evolutionary stage is determined by the bolometric
temperature, Tbol. The horizontal line separates
Class 0 and Class I sources, using Tbol = 70 K as criterion for
separation (Chen et al. 1995). The envelope is
characterised by a power-law density distribution with volume density at the inner
edge, nH,0, inner radius, r0, envelope
radius renv, and power-law exponent
α (Eq.
(1)). The overall column density
along the line-of-sight from the envelope edge towards the core centre is denoted by
NH, whereas
represents the column density in the
water-freezeout zone, i.e., regions where water is mostly in icy form (see Sect. 3.2 for more details). Ns -
H2O is the observed water ice column density
(Boogert et al. 2008; Zasowski et al. 2009; Aikawa et al.
2012). The abbreviations for the water transition lines are: (o0) ortho
ground state H2O
110−101; (p0) para ground state
H2O
111−000; (p1) H2O
202−111; (p2) H2O
211−202. The bullet symbol (•) indicates that this transition has
been observed. ; Water ice column densities are from
Envelope parameters from Kristensen et al. (2012)
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