Table 2
Observed molecular species of W28 F and the resulting line parameters from a single Gaussian fit.
| Species | Transition | Frequency (MHz) | Eup (K) | ∫Tmb dv (K km s−1) | VLSR (km s−1) | ∆V (km s−1) | TMB (K) |
|---|---|---|---|---|---|---|---|
| P-H2CO | 30,3–20,2 | 218 222.192 | 21.0 | 3.94(7) | 6.7(1) | 11.0(2) | 0.34(1) |
| 32,2–22,1 | 218 475.632 | 68.1 | 0.99(6) | 6.9(3) | 9.9(7) | 0.09(1) | |
| 32,1–22,0 | 218 760.066 | 68.1 | 1.29(7) | 6.8(3) | 10.6(8) | 0.11(1) | |
| 40,4–30,3 | 290 623.405 | 34.9 | 3.34(7) | 7.1(1) | 9.6(2) | 0.33(2) | |
| 42,3–32,2 | 291 237.766 | 82.1 | 1.01(7) | 7.8(3) | 9.4(8) | 0.10(2) | |
| 42,2–32,1 | 291 948.067 | 82.1 | 0.97(7) | 6.7(3) | 8.3(8) | 0.11(2) | |
| 50,5–40,4 | 362 736.048 | 52.3 | 1.3(1) | 7.2(5) | 12(2) | 0.10(2) | |
| o-H2CO | 31,2–21,1 | 225 697.775 | 33.4 | 4.6(2) | 6.9(2) | 10.7(5) | 0.40(2) |
| 43,2–33,1 | 291 380.442 | 140.9 | 1.02(6) | – | – | 0.08(2)(a) | |
| 43,1–33,0 | 291 384.361 | 140.9 | 1.02(6) | – | – | 0.08(2)(a) | |
| 41,3–31,2 | 300 836.635 | 47.9 | 4.36(8) | 6.96(9) | 10.1(2) | 0.40(2) | |
| 51,5–41,4 | 351 768.645 | 62.5 | 3.2(1) | 7.0(2) | 12.2(5) | 0.25(2) | |
| E-CH3OH | 42–31 E | 218 440.063 | 45.5 | 0.72(1) | 7.2(7) | 9(2) | 0.07(1) |
| 50–40 E | 241 700.159 | 47.9 | 1.0(4) | 6(2) | 10(4) | 0.10(2) | |
| 5−1–4−1 E | 241 767.234 | 40.4 | 4.1(1) | 7.0(1) | 10.5(4) | 0.37(2) | |
| 51–41 E | 241 879.025 | 55.9 | – | – | – | <0.06 (b) | |
| 5−2–4−2 E | 241 904.147 | 60.7 | 0.34(8) | – | – | 0.03(2)(a) | |
| 52–42 E | 241 904.643 | 57.1 | 0.34(8) | – | – | 0.03(2)(a) | |
| 60–50 E | 289 939.377 | 61.8 | 1.0(1) | 6.3(4) | 10(1) | 0.10(2) | |
| 6−1–5−1 E | 290 069.747 | 54.3 | 4.13(8) | 7.28(9) | 9.5(2) | 0.41(2) | |
| 61–51 E | 290 248.685 | 69.8 | – | – | – | <0.06 (b) | |
| 6–2–5–2 E | 290 307.281 | 74.7 | 0.33(6) | – | – | 0.03(1)(a) | |
| 62–52 E | 290 307.738 | 71.0 | 0.33(6) | – | – | 0.33(1)(a) | |
| 30-2–1 E | 302 369.773 | 27.1 | 0.86(7) | 7.4(3) | 8.4(8) | 0.10(2) | |
| 31–20 E | 310 192.994 | 35.0 | 0.51(7) | 8.1(6) | 9(1) | 0.05(1) | |
| 40–3–1 E | 350 687.662 | 36.3 | – | – | – | ~0.07(1)(c) | |
| A-CH3OH | 50 A+–40 A+ | 241 791.352 | 34.8 | 4.8(1) | 7.1(1) | 9.7(2) | 0.47(2) |
| 52 A−–42 A− | 241 842.284 | 72.5 | – | – | – | <0.06 (b) | |
| 52 A+–42 A+ | 241 887.674 | 72.5 | – | – | – | <0.06 (b) | |
| 60 A+–50 A+ | 290 110.637 | 48.7 | 5.60(8) | 7.19(6) | 9.6(2) | 0.54(2) | |
| 11 A−–10 A+ | 303 366.921 | 16.9 | 0.68(9) | 7.2(6) | 10(2) | 0.06(2) | |
| 21 A−–20 A+ | 304 208.348 | 21.6 | 0.64(8) | 6.2(6) | 9(1) | 0.06(2) | |
| 31 A−–30 A+ | 305 473.491 | 28.6 | 0.95(7) | 6(1) | 14(2) | 0.06(1) | |
| 41 A−–40 A+ | 307 165.924 | 38.0 | 0.68(8) | 7.6(4) | 11(1) | 0.08(1) | |
| 51 A−–50 A+ | 309 290.360 | 49.7 | 0.67(7) | 6(1) | 10(1) | 0.06(2) | |
| 61 A−–60 A+ | 311 852.612 | 63.7 | 0.58(7) | 6.9(4) | 6.7(9) | 0.08(1) | |
| 11 A+–00 A+ | 350 905.100 | 16.8 | 0.70(8) | 7.4(8) | 14(2) | 0.05(1) | |
| SO | 55–44 | 215 220.653 | 44.1 | 1.30(9) | 6.3(3) | 11.8(7) | 0.11(2) |
| 65–54 | 251 825.770 | 50.7 | 1.4(1) | 7.4(5) | 10(1) | 0.12(3) | |
| 77–66 | 301 286.124 | 71.0 | 0.80(8) | 6.9(4) | 9(1) | 0.09(2) | |
| 78–67 | 30 4077.844 | 62.1 | 2.4(1) | 7.2(2) | 11.8(7) | 0.19(2) | |
| 88–77 | 344 310.612 | 87.5 | 0.8(1) | 6(1) | 10(2) | 0.07(2) | |
| 89–78 | 346 528.481 | 78.8 | 1.4(1) | 6.7(5) | 9(1) | 0.14(1) | |
| SiO | 5–4 | 217 104.919 | 31.3 | 2.45(7) | 7.0(2) | 12.7(4) | 0.18(1) |
| 7–6 | 303 926.960 | 58.3 | 1.01(8) | 6.5(4) | 11(1) | 0.09(2) | |
| 8–7 | 347 330.581 | 75.0 | 1.0(1) | 8.1(8) | 14(2) | 0.06(1) |
Notes. Columns left to right: molecular species, quantum numbers, frequency and upper level energy of transition, velocity-integrated main-beam brightness temperature, centroid LSR velocity, line width, and peak main-beam brightness temperature. The TMB values are the fit results and not the absolute peak observed values. In cases where no Gaussian fitting could be done, the observed temperature peaks have been shown. The numbers within the parentheses show the error associated with the last significant digit. (a)These lines were blended with same Eup and Aij values. They were fitted with one Gaussian and the integrated intensities were obtained by dividing the result of the fit by the number of blended lines assuming equal contribution from each. No attempt was made to derive LSR velocities or line widths. (b)3σ detection threshold applied for non-detected lines. (c)The covered CH3OH lines were blended with a NO line and hence only an estimate of the upper limit on their peak main-beam brightness temperature could be established. For this, we assumed that the NO lines at ~351 050 and ~350 690 MHz have similar emission strengths because of their identical Eup and very similar Aij values.
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