EDP Sciences logo
Subscriber Authentication Point
Search
Menu
Home All issues Volume 689 (September 2024) A&A, 689 (2024) A64 Full HTML
Open Access

Table 3.

Best-fit results and 1σ confidence level range from the non-LTE LVG analysis for GMC9a, GMC6, SSC2, and GMC2b, respectively (from top to bottom).

Species Component Ntot Range Ntot Tkin Range Tkin nH2 Range nH2 Size (θs) Range θs Range τL(b)
(cm−2) (cm−2) (K) (K) (cm−3) (cm−3) (″) (″)
GMC9a
CS 1 2 × 1015 (0.8 − 5)×1015 6 5 − 7 ... ≥1.5 × 106 1.60 (a) ≥1.20 0.6 − 1.6
2 2 × 1014 (0.8 − 15)×1014 60 15 − 70 ... ≥3 × 105 1.60 (a) ≥0.44 < 0.5
H2CS 1 1.3 × 1014 (0.8 − 27)×1014 16 11 − 35 6 × 104 (3 − 17)×104 ... ≥0.35 ≤0.3
OCS 1 1 × 1017 (0.1 − 1.5)×1017 15 14 − 16 ... ≥105 0.18 0.15 − 0.40 0.1 − 2.0
SO 1 1.5 × 1016 (0.3 − 5)×1016 170 45 − 300 (c) 3 × 104 (2.5 − 6)×104 0.17 0.13 − 0.34 0.3 − 1.0
GMC6
CS 1 1.5 × 1016 ≥5 × 1015 12 11 − 14 6 × 104 (1.1 − 80)×104 1.60 (a) ≥1.60 ≤6.0
2 2 × 1015 (0.6 − 7)×1015 23 22 − 27 ... ≥3.5 × 106 1.60 (a) ≥1.00 ≤0.8
H2S 1 2 × 1017 (1.4 − 3)×1017 70 68 − 91 3 × 107 (1.5 − 7)×107 0.26 0.24 − 0.32 0.2 − 1.9
H2CS 1 4 × 1016 (0.2 − 20)×1016 19 16 − 38 5.5 × 104 (0.1 − 70)×105 0.22 0.21 − 0.70 0.1 − 2.8
2 4 × 1016 (0.3−70) × 1016 100 50 − 300 (c) 7 × 105 (0.3 − 10)×106 0.11 0.10 − 0.30 0.01 − 1.5
OCS 1 7 × 1016 (3 − 15)×1016 65 50 − 100 (c) ... ≥6 × 104 0.17 0.13 − 0.25 0.2 − 1.0
SO 1 1 × 1015 (0.8 − 5)×1015 ... ≥30 ... ≥8 × 104 ... ≥0.80 ≤0.1
2 5 × 1016 (2 − 10)×1016 48 45 − 56 ... ≥1.5 × 106 0.26 0.17 − 0.42 0.1 − 0.8
SSC2
CS 1 8 × 1015 (4 − 17)×1015 12 11 − 14 5 × 104 (2 − 15)×104 1.60 (a) 1.50 − 2.00 3.0 − 4.0
2 9 × 1014 (5 − 15)×1014 90 40 − 101 5 × 105 (0.4 − 10)×106 1.60 (a) ≥1.50 ≤0.3
H2S 1 1.2 × 1017 (1 − 1.6)×1017 48 45 − 54 ... ≥3 × 107 0.20 0.18 − 0.22 0.2 − 2.5
H2CS 1 1.2 × 1016 (0.4 − 2)×1016 11 10 − 13 ... ≥5.5 × 104 0.30 0.25 − 0.45 0.5 − 1.3
2 4 × 1016 (2.7 − 9.3)×1016 40 35 − 50 5 × 105 (3 − 19)×105 0.10 0.10 − 0.12 0.2 − 1.5
OCS 1 7 × 1016 (2.5 − 15)×1016 40 30 − 50 ... ≥2.5 × 104 0.17 (a) 0.12 − 0.25 0.2 − 3.0
SO 1 7 × 1014 (4 − 20)×1014 17 15 − 40 ... ≥1.5 × 105 ... ≥1.00 ≤0.05
2 1.5 × 1016 (0.3 − 70)×1015 30 27 − 46 ... ≥6.5 × 105 ... ≥0.20 ≤1.4
GMC2b
CS 1 1.5 × 1015 (0.5 − 1.7)×1015 6 5 − 7 5 × 105 (2.3 − 12)×105 1.60 (a) ≥1.50 ≤1.7
2 1.5 × 1014 (1.3 − 8)×1014 35 15 − 95 4 × 105 (1.5 − 80)×105 1.60 (a) 0.60 − 2.00 0.01 − 0.4
H2CS 1 6.7 × 1013 (0.5 − 27)×1014 30 14 − 70 4 × 104 (3.8 − 20)×104 ... ≥0.3 ≤0.3
OCS 1 1 × 1017 (0.3 − 1)×1017 13 12 − 14 ... ≥3 × 104 0.18 0.15 − 0.25 0.3 − 1.8
SO 1 5 × 1015 (2 − 30)×1015 200 70 − 300 (c) 1.5 × 104 (1.5 − 2)×104 0.30 0.26 − 0.46 0.1 − 0.8

Notes.

(a)

Initial fixed size assumed before exploring the range of similar solution (see text Sect. 5.2.2).

(b)

Average value for the optical depths of all the transitions over the range of size θs.

(c)

Maximum limit due to the maximum temperature for which the collisional rates are available.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.