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Home All issues Volume 696 (April 2025) A&A, 696 (2025) A7 Full HTML
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Table A.2

Physical parameters of CH3COCH3, CH3CHO, and C2H5CN.

Region Core CH3COCH3 CH3CHO C2H5CN
T N fH2 T N fH2 T N fH2
(K) (cm−2) (K) (cm−2) (K) (cm−2)
IRAS 14498-5856 C1 152 ± 8 (3.4 ± 1.0) × 1015 (1.6 ± 0.5) × 10−08 152 ± 8 (2.2 ± 0.3) × 1015 (1.1 ± 0.2) × 10−08 245 ± 13 (5.8 ± 0.7) × 1015 (2.8 ± 0.4) × 10−08
IRAS 15520-5234 C3 100 ± 4 (1.6 ± 0.3) × 1015 (8.9 ± 1.7) × 10−09 100 ± 4 (6.5 ± 1.1) × 1014 (3.6 ± 0.6) × 10−09 95 ± 4 (1.3 ± 0.1) × 1015 (7.3 ± 0.7) × 10−09
IRAS 15596-5301 C1 113 ± 9 (2.2 ± 0.3) × 1015 (3.1 ± 0.9) × 10−08 113 ± 10 (3.0 ± 0.9) × 1014 (4.3 ± 1.7) × 10−09 250 ± 18 (3.5 ± 0.5) × 1015 (5.0 ± 1.4) × 10−08
C2 95 ± 8 (2.6 ± 0.3) × 1015 (1.6 ± 0.6) × 10−08 95 ± 8 (8.8 ± 2.0) × 1014 (5.3 ± 2.3) × 10−09 170 ± 15 (2.6 ± 0.5) × 1015 (1.6 ± 0.6) × 10−08
IRAS 16060-5146 C1 120 ± 2 (7.6 ± 1.5) × 1015 (1.0 ± 0.2) × 10−08 120 ± 2 (2.1 ± 0.3) × 1015 (2.8 ± 0.5) × 10−09 95 ± 6 (6.2 ± 1.4) × 1015 (8.2 ± 2.0) × 10−09
C2 147 ± 12 (1.8 ± 0.4) × 1016 (1.5 ± 0.4) × 10−08 147 ± 12 (6.0 ± 0.9) × 1015 (5.0 ± 1.0) × 10−09 … … …
C3 150 ± 7 (7.0 ± 0.8) × 1016 (6.0 ± 0.9) × 10−08 150 ± 7 (1.5 ± 0.3) × 1016 (1.3 ± 0.3) × 10−08 123 ± 8 (3.9 ± 0.5) × 1016 (3.3 ± 0.5) × 10−08
IRAS 16071-5142 C1 138 ± 2 (5.2 ± 0.6) × 1016 (6.9 ± 1.4) × 10−08 138 ± 2 (2.0 ± 0.4) × 1016 (2.7 ± 0.7) × 10−08 107 ± 3 (5.4 ± 0.6) × 1016 (7.1 ± 1.4) × 10−08
IRAS 16076-5134 C2 163 ± 8 (1.0 ± 0.2) × 1016 (5.3 ± 1.3) × 10−08 163 ± 8 (1.8 ± 0.4) × 1015 (9.5 ± 2.4) × 10−09 116 ± 15 (1.5 ± 0.1) × 1016 (8.1 ± 1.2) × 10−08
IRAS 16272-4837 C1 119 ± 6 (1.7 ± 0.5) × 1016 (5.8 ± 1.7) × 10−08 119 ± 6 (8.9 ± 1.8) × 1015 (3.0 ± 0.6) × 10−08 153 ± 6 (3.4 ± 0.6) × 1016 (1.1 ± 0.2) × 10−07
C2 92 ± 4 (5.2 ± 0.9) × 1015 (1.3 ± 0.3) × 10−08 92 ± 4 (2.8 ± 0.6) × 1015 (7.1 ± 2.0) × 10−09 117 ± 10 (9.2 ± 1.7) × 1015 (2.3 ± 0.6) × 10−08
C3 145 ± 6 (2.3 ± 0.3) × 1017 (1.5 ± 0.2) × 10−07 145 ± 6 (4.2 ± 0.7) × 1016 (2.7 ± 0.5) × 10−08 108 ± 11 (1.5 ± 0.2) × 1017 (9.5 ± 1.6) × 10−08
IRAS 16351-4722 C1 153 ± 7 (1.6 ± 0.3) × 1015 (6.8 ± 1.5) × 10−09 153 ± 7 (3.0 ± 0.6) × 1014 (1.3 ± 0.3) × 10−09 112 ± 14 (4.1 ± 0.4) × 1014 (1.7 ± 0.2) × 10−09
C2 132 ± 12 (7.8 ± 1.1) × 1016 (4.2 ± 0.9) × 10−07 132 ± 12 (1.4 ± 0.3) × 1016 (7.5 ± 2.0) × 10−08 165 ± 29 (1.0 ± 0.3) × 1017 (5.5 ± 1.9) × 10−07
IRAS 17220-3609 C1 125 ± 3 (1.9 ± 0.2) × 1016 (3.9 ± 0.6) × 10−08 125 ± 3 (9.0 ± 1.8) × 1015 (1.8 ± 0.4) × 10−08 127 ± 8 (4.5 ± 0.4) × 1016 (9.0 ± 1.4) × 10−08
C2 125 ± 3 (1.7 ± 0.5) × 1016 (2.6 ± 0.8) × 10−08 125 ± 4 (8.0 ± 2.1) × 1015 (1.2 ± 0.3) × 10−08 125 ± 2 (1.8 ± 0.3) × 1016 (2.8 ± 0.4) × 10−08

Notes. The rotation temperature of CH3CHO is assumed to be equal to that of CH3COCH3. “…” indicates no molecular lines were detected.

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