Table 2
Observed and derived parameters.
| Species | Transitions | VLSR (a) | TMB(a) | ΔV (a) | ∫ TMBdv(b) |  |
|---|---|---|---|---|---|---|
| (km s−1) | (mK) | (m s−1) | (K m s−1) | (1012 cm−2) | ||
| HC3N | J = 2−1 F = 1−1 | 6.660(9) | 692(110) | 177(39) | 130(22) | |
| J = 2−1 F = 3−2 | 6.650(2) | 3230(110) | 206(6) | 709(18) | ||
| J = 2−1 F = 2−1 | 6.642(4) | 2134(111) | 164(11) | 372(7) | ||
| J = 2−1 F = 1−0 | 6.640(8) | 1172(110) | 145(18) | 172(6) | ||
| J = 2−1 F = 2−2 | 6.640(9) | 852(110) | 185(30) | 167(6) | 45(4) | |
| HC5N | J = 6−5 F = 7−6 | 6.626(5) | 628(46) | 161(11) | 106(5) | |
| J = 6−5 F = 6−5 | 6.625(5) | 629(46) | 194(13) | 126(5) | ||
| J = 6−5 F = 5−4 | 6.626(8) | 427(46) | 193(19) | 87(5) | 9.7(6) | |
| HC7N | J = 14−13 | 6.639(9) | 257(30) | 184(27) | 51(10) | |
| J = 15−14 | 6.644(9) | 318(30) | 156(33) | 53(10) | ||
| J = 16−15 | 6.601(7) | 252(41) | 168(18) | 45(4) | 1.4(0.2) | |
| C3S | J = 3−2 | 6.640(9) | 161(33) | 151(19) | 26 (3) | 0.8(0.1)(d) |
| C4H | N = 9−8 J = 19/2−17/2 | 6.79(7) | 187(35) | 520(120) | 122(24) | |
| N = 9−8 J = 17/2−15/2 | 6.78(3) | 266(35) | 535(87) | 105(15) | 45(8) | |
| CH3CCH | J = 5(0)−4(0) | 6.74(4) | 220(9) | 359(155) | 91(4) | |
| J = 5(1)−4(1) | 6.72(3) | 170(9) | 350(40) | 83(8) | ||
| J = 5(2)−4(2) | 6.72(3) | 42(8) | 310(40) | 12(8) | 20(3) | |
| c-C3H2 | 2(1,2)−1(0,1) | 6.77(4) | 1720(40) | 563(15) | 671(16) | 5.5(0.1) |
| HC3N | J = 10−9 | 6.70(2) | 629(45) | 416(45) | 254(15) | 3.4(0.3) |
Notes. (a) The uncertainties of VLSR, TMB and ΔV are obtained from Gaussian fitting. (b)The uncertainties of ∫ TMBdv are calculated from error transfer formula. (c)Column densities of species are adopted as average values calculated from different hyperfine lines weighted by TMB /σ, assuming all are optical thin with an identical excitation temperature, except that of HC3 N based on HC3 N J = 2−1 whose optical depths are derived from HFS fitting and that of CH3 CCH whose column density is adopted as the value given by rotation diagram. Uncertainties of column densities are calculated from error transfer formula, including the error introduced from the uncertainty of excitation temperature. (d) C3S parameters at O point are listed.
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