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Table 5

Number of detected lines (SN ≥ 3), range of upper level energies of the detected transitions, temperatures (K), and beam-averaged column densities (cm−2) derived from the rotational diagram analysis.

Species Nlines Eu Trot Ntot
(K) (K) (cm−2)
L1489-IRS

SO 2 35−44 6 (2) 2(3) × 1014
p-H2CO 3 21−68 23 (3) 43(13) × 1011
c-C3H2 3 19−39 19 (5) 5(2) × 1011

B5-IRS1

SO 2 35−44 8 (2) 1(2) × 1014
p-H2CO 3 21−68 24 (3) 6(2) × 1012
c-C3H2 4 19−61 18 (3) 10(3) × 1011

L1455-IRS1

SO 2 35−44 10 (4) 4(5) × 1013
OCS 2 100−110 59(102) 2(5) × 1013
p-H2CO 3 21−68 68(25) 20(6) × 1012
HDCS 2 42−51 13 (9) 2(5) × 1012
c-C3H2 4 19−61 16 (3) 13(5) × 1011

L1551-IRS5

SO 2 35−44 40 (50) 2(3) × 1013
SO2 2 19−94 44 (8) 8(2) × 1012
OCS(a) 2 100−110 64 (121) 2(5) × 1015
p-H2CO 3 21−68 41 (9) 4(13) × 1013
o-D2CO 2 28−50 18 (4) 3(2) × 1012
p-D2CO 2 32−50 28 (14) 9(7) × 1012
c-C3H2 4 19−61 24 (4) 11(3) × 1012
H2CCO 2 64−76 21 (13) 2(8) × 1013
CH3OH(b) 9 45−374 148 (30) 16(4) × 1013
CH3CN 5 68−133 133 (81) 1(5) × 1012
CH3CCH 3 75−103 23 (11) 6(13) × 1013
CH3CHO(b) 3 26−182 42 (5) 22(6) × 1012

Notes. (a)Column density is corrected for opacity, as mentioned in Sect. 4.2. (b)Column densities refer to the sum of the A and E types of methanol and acetaldehyde.

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