Free Access

Table 4

Chemical models.

Model CR (×10-17) Cloud size (mag) Draine field X(CN) X(N2H+) X(CS) [CN]/[N2H+] [CN]/[CS] [CS]/[N2H+]

High-UV
1 5000 100 6e3 1.2e-7 8.0e-9 2.1e-7 15 0.56 27
2 500 100 6e3 1.2e-8 2.8e-9 2.4e-7 4.2 0.05 85
3 5 100 6e3 1.3e-9 1.1e-10 4.7e-8 12 0.03 439
4 5000 50 6e3 1.1e-7 4.6e-9 1.0e-7 23 1.0 22
5 500 50 6e3 1.4e-8 1.2e-9 7.0e-8 11 0.2 58
6 5 50 6e3 2.4e-9 8.1e-11 5.2e-8 29 0.05 641
7 5000 20 6e3 1.0e-7 8.3e-10 1.2e-8 130 9.0 14
8 500 20 6e3 2.2e-8 2.2e-10 5.0e-9 100 4.4 22
9 5 20 6e3 1.0e-8 2.4e-10 8.0e-8 2173 0.07 333
10 5000 10 6e3 5.7e-8 5.3e-11 1.7e-9 1055 38 32
11 500 10 6e3 2.0e-8 2.1e-11 1.6e-9 952 12 76
12 5 10 6e3 1.2e-8 1.1e-12 1.9e-9 1.0e4 6 1727
13 5000 5 6e3 1.9e-8 3.0e-13 1.0e-9 6.4e4 19 3333
14 500 5 6e3 2.0e-8 6.4e-14 1.2e-9 3.1e5 16 18750
15 5 5 6e3 2.2e-8 3.6e-14 1.4e-9 6.1e5 16 38889

Low-UV
16 5000 100 6e2 1.1e-7 1.0e-8 3.1e-7 11 0.38 30
17 500 100 6e2 8.6e-9 4.0e-9 3.0e-7 2.1 0.03 74
18 5 100 6e2 9.9e-10 1.0e-10 2.8e-8 9.4 0.03 270
19 5000 50 6e2 1.1e-7 8.2e-9 2.4e-7 13 0.45 29
20 500 50 6e2 9.4e-9 3.2e-9 2.4e-7 3 0.04 75
21 5 50 6e2 1.8e-9 8.4e-11 3.2e-8 122 0.06 380
22 5000 20 6e2 1.0e-7 5.5e-9 1.7e-7 19 0.59 31
23 500 20 6e2 1.3e-8 1.8e-9 1.9e-7 7 0.07 105
24 5 20 6e2 4.6e-9 4.6e-11 5.0e-8 98 0.01 1086
25 5000 10 6e2 8.9e-8 1.9e-9 7.2e-8 47 0.81 37
26 500 10 6e2 2.0e-8 3.8e-10 7.6e-8 52 0.26 200
27 5 10 6e2 9.0e-9 4.3e-12 2.0e-8 28 0.45 4651
28 5000 5 6e2 4.0e-8 2.8e-11 3.2e-9 1428 12 114
29 500 5 6e2 1.8e-8 1.3e-12 3.0e-9 1.4e4 6 2307
30 5 5 6e2 1.7e-8 4.0e-15 3.6e-9 4.3e6 5 9E5

Notes. Notation: 6e3 = 6 × 103.

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.