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Table 2.
Line parameters for the lines of l-H2C3, l-H2C4, l-H2C5, and l-H2C6 observed in TMC-1.
| State | Transition | Rest freq. | Eup | Sij |  |
VLSR | Δv |  |
|---|---|---|---|---|---|---|---|---|
| (JKa, Kc)u − (JKa, Kc)l | (MHz) | (K) | (mK km s−1) | (km s−1) | (km s−1) | (mK) | ||
| l-H2C3 | ||||||||
| ortho | 21, 2 − 11, 1 | 41198.335(2) | 2.0 | 1.50 | 72.0208(2) | 5.71(1) | 0.61(1) | 110.3(3) |
| para | 20, 2 − 10, 1 | 41584.675(1) | 3.0 | 2.00 | 50.0199(4) | 5.75(1) | 0.58(1) | 81.11(3) |
| ortho | 21, 1 − 11, 0 | 41967.671(2) | 2.0 | 1.50 | 72.2521(2) | 5.75(1) | 0.56(1) | 122.5(3) |
| l-H2C4 | ||||||||
| ortho | 41, 4 − 31, 3 | 35577.008(2) | 3.8 | 3.75 | 137.590(1) | 5.71(1) | 0.70(1) | 185.3(2) |
| para | 40, 4 − 30, 3 | 35727.379(1) | 4.3 | 4.00 | 91.6939(2) | 5.53(1) | 0.67(1) | 128.0(2) |
| ortho | 41, 3 − 31, 2 | 35875.775(2) | 3.9 | 3.75 | 140.130(1) | 5.69(1) | 0.69(1) | 189.9(2) |
| ortho | 51, 5 − 41, 4 | 44471.137(2) | 6.0 | 4.80 | 120.160(1) | 5.72(1) | 0.57(1) | 199.4(4) |
| para | 50, 5 − 40, 4 | 44659.015(1) | 6.0 | 5.00 | 73.0765(2) | 5.58(1) | 0.58(1) | 119.2(4) |
| ortho | 51, 4 − 41, 3 | 44844.590(2) | 6.4 | 4.80 | 117.010(1) | 5.70(1) | 0.59(1) | 186.6(4) |
| l-H2C5(a) | ||||||||
| ortho | 71, 7 − 61, 6 | 32066.923(10) | 5.9 | 6.86 | 0.6759(5) | 5.83 (b) | 0.69(17) | 0.9(2) |
| para | 70, 7 − 60, 6 | 32133.955(10) | 6.2 | 7.00 | 1.3465(2) | 5.83 | 1.06(16) | 1.2(2) |
| ortho | 71, 6 − 61, 5 | 32199.773(10) | 6.0 | 6.86 | 1.1423(2) | 5.83 | 0.77(12) | 1.4(2) |
| ortho | 81, 8 − 71, 7 | 36647.828(10) | 7.7 | 7.88 | 0.7123(5) | 5.83 | 0.58(13) | 1.2(3) |
| para | 80, 8 − 70, 7 | 36724.441(10) | 7.9 | 8.00 | 0.5152(11) | 5.83 | 0.53(23) | 0.9(3) |
| ortho | 81, 7 − 71, 6 | 36799.676(10) | 7.7 | 7.88 | 0.5908(7) | 5.83 | 0.48(19) | 1.2(2) |
| ortho | 91, 9 − 81, 8 | 41228.743(10) | 9.7 | 8.89 | 0.7447(6) | 5.83 | 0.54(16) | 1.2(4) |
| para | 90, 9 − 80, 8 | 41314.893(30) | 9.9 | 9.00 | ... (c) | 5.83 | ... | ... |
| ortho | 91, 8 − 81, 7 | 41399.559(10) | 9.7 | 8.89 | 0.4890(14) | 5.83 | 0.59(29) | 0.8(4) |
| ortho | 101, 10 − 91, 9 | 45809.644(10) | 11.9 | 9.90 | 0.5462(8) | 5.83 | 0.37(11) | 1.4(4) |
| ortho | 101, 9 − 91, 8 | 45999.420(10) | 11.9 | 9.90 | 0.6841(5) | 5.83 | 0.42(10) | 1.5(4) |
| l-H2C6 | ||||||||
| ortho | 121, 12 − 111, 11 | 32232.270(6) | 9.9 | 11.9 | 3.89347(2) | 5.82(2) | 0.80(5) | 4.6(2) |
| para | 120, 12 − 110, 11 | 32273.061(6) | 10.1 | 12.0 | 2.25233(5) | 5.86(3) | 0.73(7) | 2.9(2) |
| ortho | 121, 11 − 111, 10 | 32313.117(6) | 10.0 | 11.9 | 4.17934(2) | 5.83(2) | 0.81(5) | 4.8(3) |
| ortho | 131, 13 − 121, 12 | 34918.254(8) | 11.6 | 12.9 | 3.58530(2) | 5.84(2) | 0.66(4) | 5.1(3) |
| para | 130, 13 − 120, 12 | 34962.439(8) | 11.7 | 13.0 | 2.61780(6) | 5.86(4) | 0.91(9) | 2.7(3) |
| ortho | 131, 12 − 121, 11 | 35005.838(8) | 11.6 | 12.9 | 3.52717(2) | 5.83(1) | 0.70(4) | 4.7(2) |
| ortho | 141, 14 − 131, 13 | 37604.22(1) | 13.4 | 13.9 | 2.95633(3) | 5.80(2) | 0.67(4) | 4.1(2) |
| para | 140, 14 − 130, 13 | 37651.80(1) | 13.6 | 14.0 | 1.73602(10) | 5.83(4) | 0.70(9) | 2.3(3) |
| ortho | 141, 13 − 131, 12 | 37698.54(1) | 13.4 | 13.9 | 2.87938(3) | 5.80(2) | 0.73(5) | 3.7(2) |
| ortho | 151, 15 − 141, 14 | 40290.19(1) | 15.3 | 14.9 | 2.58873(5) | 5.75(2) | 0.56(5) | 4.4(4) |
| para | 150, 15 − 140, 14 | 40341.16(1) | 15.5 | 15.0 | 1.95729(10) | 5.87(5) | 0.76(9) | 2.4(4) |
| ortho | 151, 14 − 141, 13 | 40391.25(1) | 15.4 | 14.9 | 2.47566(5) | 5.91(3) | 0.65(8) | 3.6(2) |
| ortho | 161, 16 − 151, 15 | 42976.15(2) | 17.4 | 15.9 | 1.2139(2) | 5.92(4) | 0.48(7) | 2.4(3) |
| para | 160, 16 − 150, 15 | 43030.51(2) | 17.6 | 16.0 | 0.7463(4) | 5.80(6) | 0.50(12) | 1.4(3) |
| ortho | 161, 15 − 151, 14 | 43083.94(2) | 17.4 | 15.9 | 1.61939(11) | 5.88(3) | 0.62(8) | 2.5(3) |
| ortho | 171, 17 − 161, 16 | 45662.09(2) | 19.6 | 16.9 | 1.0792(4) | 5.86(9) | 0.68(23) | 1.5(5) |
| para | 170, 17 − 160, 16 | 45719.84(2) | 19.7 | 17.0 | 1.3389(2) | 5.92(6) | 0.61(12) | 2.1(4) |
| ortho | 171, 16 − 161, 15 | 45776.62(2) | 19.6 | 16.9 | 0.6063(12) | 5.85(9) | 0.45(24) | 1.3(6) |
| ortho | 181, 18 − 171, 17 | 48348.02(2) | 21.9 | 17.9 | 1.3459(3) | 5.72(9) | 0.68(19) | 1.8(6) |
| para | 180, 18 − 170, 17 | 48409.16(2) | 22.1 | 18.0 | 0.36152(11) | 5.82(9) | 0.23(90) | 1.4(6) |
| ortho | 181, 17 − 171, 16 | 48469.29(2) | 22.0 | 17.9 | 0.37677(10) | 6.27(5) | 0.23(90) | 1.5(6) |
Notes. Numbers in parentheses indicate the uncertainty in units of the last significant digits. For the observational parameters we adopted the uncertainty of the Gaussian fit provided by GILDAS.
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