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Table 3

Upper limits of large molecules toward the lines of sight studied here.

HD 169454 BD −14°5037 CPD −33°1768 CPD −32°1734 HD 183143
λ air S/N W λ N max a S/N W λ N max a S/N W λ N max a S/N W λ N max a S/N W λ N max a

anthracene
3610.74 371 230 1.6 0.8 113 3.3 1.7 81 4.6 2.4 143 2.6 1.4 69 5.4 2.8
phenanthrene
3409.21 284 165 1.7 105 97 2.9 180 62 4.6 285 145 1.9 118 53 5.3 330
pyrene
3208.22 1493 70 21 2.3 37 40 4.4 23 65 7.2 51 29 3.2 23 65 7.1
2,3-benzofluorene
3344.16 270 117 2.3 2.7 88 3.1 3.7 47 5.7 6.8 117 2.3 2.8 41 6.6 7.9
benzo[ghi]perylene
3512.15 1822 206 8.8 8.8 125 14.6 14.6 82 22 22 165 11 11 76 24 24
3501.76 1465 206 7.1 12.8 125 11.7 21 82 18 32 165 8.9 16 76 19 34

Notes. 

(a)

Upper limits Nmax in units of 1012 cm-2.

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