Table A.1
Gaussian fit results for the lines of small hydrocarbons detected toward the Horsehead PDR at RA = 5h40m53.936s, Dec = −2°28′00′′ (J2000).
| Species | Transition | Frequency | Area | Velocity | Width |
| MHz | mK km s-1 | km s-1 | km s-1 | ||
|
|
|||||
| C2H | N = 1−0,J = 3/2−1/2 F = 1−1 | 87 284.105 | 238 ± 3 | 10.675 ± 0.005 | 0.735 ± 0.013 |
| N = 1−0,J = 3/2−1/2 F = 2−1 | 87 316.898 | 1943 ± 6 | 10.682 ± 0.001 | 0.815 ± 0.003 | |
| N = 1−0,J = 3/2−1/2 F = 1−0 | 87 328.585 | 1035 ± 4 | 10.675 ± 0.002 | 0.769 ± 0.004 | |
| N = 1−0,J = 1/2−1/2 F = 1−1 | 87 401.989 | 1103 ± 5 | 10.694 ± 0.002 | 0.785 ± 0.004 | |
| N = 1−0,J = 1/2−1/2 F = 0−1 | 87 407.165 | 489 ± 4 | 10.697 ± 0.003 | 0.749 ± 0.008 | |
| N = 1−0,J = 1/2−1/2 F = 1−0 | 87 446.470 | 262 ± 3 | 10.700 ± 0.004 | 0.745 ± 0.011 | |
|
|
|||||
| c-C3H | N = 212−111,J = 5/2−3/2 F = 3−2 | 91 494.231 | 106 ± 3 | 10.395 ± 0.010 | 0.691 ± 0.024 |
| N = 212−111,J = 5/2−3/2 F = 2−1 | 91 497.525 | 59 ± 3 | 10.561 ± 0.012 | 0.594 ± 0.034 | |
| N = 212−111,J = 3/2−1/2 F = 1−0 | 91 692.752 | 32 ± 3 | 10.712 ± 0.036 | 0.887 ± 0.084 | |
| N = 212−111,J = 3/2−1/2 F = 2−1 | 91 699.471 | 74 ± 4 | 10.760 ± 0.020 | 0.858 ± 0.050 | |
|
|
|||||
| l-C3H | J = 9/2−7/2 F = 5−4(f) | 97 995.166 | 44 ± 7 | 10.605 ± 0.051 | 0.647 ± 0.108 |
| J = 9/2−7/2 F = 4−3(f) | 97 995.913 | 45 ± 10 | 10.583 ± 0.092 | 0.848 ± 0.235 | |
| J = 9/2−7/2 F = 5−4(e) | 98 011.611 | 41 ± 7 | 10.629 ± 0.046 | 0.599 ± 0.116 | |
| J = 9/2−7/2 F = 4−3(e) | 98 012.524 | 35 ± 8 | 10.550 ± 0.075 | 0.651 ± 0.183 | |
|
|
|||||
| c-C3H2 | 202−111 | 82 093.542 | 242 ± 6 | 10.704 ± 0.009 | 0.741 ± 0.023 |
| 312−303 | 82 966.200 | 68 ± 3 | 10.660 ± 0.012 | 0.618 ± 0.029 | |
| 322−313 | 84 727.696 | 14 ± 2 | 10.633 ± 0.028 | 0.344 ± 0.051 | |
| 212−101 | 85 338.893 | 748 ± 4 | 10.687 ± 0.002 | 0.767 ± 0.005 | |
| 303−212 | 117 151.191 | 507 ± 72 | 10.680 ± 0.051 | 0.715 ± 0.117 | |
|
|
|||||
| l-C3H2 | 414−313 | 82 395.090 | 107 ± 7 | 10.681 ± 0.020 | 0.720 ± 0.057 |
| 404−303 | 83 165.256 | 43 ± 4 | 10.362 ± 0.029 | 0.647 ± 0.068 | |
| 413−312 | 83 933.700 | 93 ± 3 | 10.690 ± 0.010 | 0.689 ± 0.025 | |
| 515−414 | 102 992.379 | 81 ± 3 | 10.658 ± 0.012 | 0.657 ± 0.030 | |
| 533−432 | 103 914.354 | 27 ± 2 | 10.592 ± 0.023 | 0.538 ± 0.052 | |
| 505−404 | 103 952.926 | 34 ± 3 | 10.803 ± 0.030 | 0.652 ± 0.068 | |
| 514−413 | 104 915.583 | 58 ± 4 | 10.696 ± 0.025 | 0.703 ± 0.058 | |
|
|
|||||
| C4H | N = 9−8,J = 19/2−17/2 | 85 634.004 | 198 ± 4 | 10.737 ± 0.007 | 0.689 ± 0.018 |
| N = 9−8,J = 17/2−15/2 | 85 672.579 | 168 ± 4 | 10.725 ± 0.007 | 0.663 ± 0.018 | |
| N = 10−9,J = 21/2−19/2 | 95 150.388 | 204 ± 3 | 10.734 ± 0.004 | 0.682 ± 0.011 | |
| N = 10−9,J = 19/2−17/2 | 95 188.946 | 177 ± 3 | 10.700 ± 0.005 | 0.665 ± 0.013 | |
| N = 11−10,J = 23/2−21/2 | 104 666.565 | 202 ± 4 | 10.732 ± 0.007 | 0.714 ± 0.019 | |
| N = 11−10,J = 21/2−19/2 | 104 705.106 | 177 ± 5 | 10.705 ± 0.011 | 0.728 ± 0.026 | |
| N = 12−11,J = 25/2−23/2 | 114 182.512 | 162 ± 12 | 10.665 ± 0.021 | 0.582 ± 0.051 | |
| N = 12−11,J = 23/2−21/2 | 114 221.040 | 186 ± 12 | 10.663 ± 0.022 | 0.719 ± 0.056 | |
Notes. Only lines in the 3 mm band with an energy of the upper level lower than 100 K and a higher signal-to-noise ratio than 8 are shown.
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