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Table 3
Sample of PDR observations of lines S(0) to S(3) with the derived values of T24, OPR234, T35, and OPR345.
| Object | Ref. | Note | T24 | OPR234 | T35 | OPR345 |
| (K) | (K) | |||||
|
|
||||||
| L1721 | (1) | upper limit for S(3) | 206 ± 13 | 0.99 ± 0.22 | < 308 | < 3.00 |
| California | (1) | – | 208 ± 19 | 0.82 ± 0.15 | 303 ± 31 | 2.32 ± 1.18 |
| NGC 7023 East | (1) | – | 269 ± 9 | 0.86 ± 0.07 | 328 ± 37 | 1.35 ± 0.21 |
| Horsehead | (1) | – | 263 ± 20 | 0.65 ± 0.21 | 399 ± 33 | 1.54 ± 0.50 |
| ρ Oph. | (1) | – | 251 ± 16 | 0.75 ± 0.23 | 291 ± 14 | 1.08 ± 0.32 |
| NGC 2023 North | (1) | – | 222 ± 18 | 0.68 ± 0.21 | 302 ± 33 | 1.54 ± 0.65 |
| NGC 7023 Southwest | (2) | upper limit for S(0) | > 242 | – | 452 ± 14 | 1.43 ± 0.25 |
| NGC 7023 Northwest | (3) | – | 293 ± 24 | 0.94 ± 0.28 | 438 ± 6 | 2.01 ± 0.28 |
| ρ Oph. “pos. 1” | (4) | – | 282 ± 23 | 1.05 ± 0.11 | 322 ± 8 | 1.41 ± 0.47 |
| ρ Oph. “pos. 2” | (4) | – | 300 ± 21 | 0.74 ± 0.22 | 313 ± 14 | 0.82 ± 0.20 |
| ρ Oph. “pos. 3” | (4) | – | 255 ± 7 | 0.58 ± 0.06 | 285 ± 7 | 0.77 ± 0.08 |
| S140 | (5) | missing S(0) | – | – | 354 ± 59 | 1.57 ± 1.11 |
| Orion Bar | (6) | – | 258 ± 19 | 1.35 ± 0.53 | 361 ± 17 | 2.85 ± 0.57 |
Reference. (1) Habart et al. (2011), (2) Fuente et al. (2000), (3) Fuente et al. (1999), (4) Habart et al. (2003), (5) Timmermann et al. (1996), (6): Joblin et al. (in prep.).
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