EDP Sciences logo
Subscriber Authentication Point
Search
Menu
Home All issues Volume 686 (June 2024) A&A, 686 (2024) A252 Full HTML
Open Access

Table 4

LTE parameters of COMs towards all six sources of the sample.

Molecule N T θs υoff ΔV NX/NH2$NX/{N_{{{\rm{H}}_2}}}$ Comments
(cm−2) (K) (″) (km s−1) width (km s−1)
G320.23
CH3CHO 3.2 × 1013 18 25.0 0.3± 0.3 3.4 ± 0.8 2.0 × 10−10
CH3CN 8.0 × 1012 26 30.0 0.8± 0.4 5.0 ± 0.8 6.0 × 10−11
(†)C2H5 CN ≤ 1.0 × 1013 26 30.0 0.8± 0.0 5.0 ± 1.4 ≤ 7.5 × 10−11 (1)
C2H3CN ≤ 8.0 × 1012 26 30.0 0.8± 0.0 5.0 ± 0.0 ≤ 6.0 × 10−11 (1)
CH3OH,υt = 0 4.1 × 1014 26 31.0 1.0± 0.2 5.1 ± 0.5 3.2 × 10−9
HC(O)NH2 ≤ 3.2 × 1012 40 15.0 0.3± 0.0 3.4 ± 0.0 ≤ 1.2 × 10−11
CH3SH ≤ 3.2 × 1013 40 15.0 0.3± 0.0 3.4 ± 0.0 ≤ 1.2 × 10−10
C2H5OH ≤ 1.3 × 1014 40 10.0 −0.8± 0.0 3.2 ± 0.0 ≤ 3.3 × 10−10 (1)
CH3OCHO 2.0 × 1015 45 5.0 1.4 ± 1.1 4.0 ± 0.8 2.5 × 10−9
CH3OCH3 3.0 × 1014 60 20.0 1.4± 0.3 5.0 ± 1.1 1.5 × 10−9
CH3OH, υt = 0 4.1 × 1015 123 6.0 1.3± 0.5 6.4 ± 1.0 6.2 × 10−9
CH3CN 2.5 × 1015 207 1.0 1.5± 0.5 5.7 ± 1.4 6.3 × 10−10
(†)C2H5CN ≤ 9.1 × 1015 207 1.0 1.5± 0.0 5.7 ± 0.0 ≤ 2.3 × 10−9 (1)
C2H3CN ≤ 1.0 × 1016 207 1.0 1.5± 0.0 5.7 ± 0.0 ≤2.5 × 10−9 (1)
G333.46
CH3SH 7.5 × 1013 18 20.0 −0.5± 0.5 4.0 ± 1.8 3.5 × 10−10
CH3OH,υt = 0 5.0 × 1014 23 40.0 −0.6± 0.2 4.7 ± 0.6 4.7 × 10−9
CH3CHO 6.5 × 1013 26 20.0 −0.5± 0.3 4.4 ± 1.2 3.0 × 10−10
CH3CN 1.2 × 1013 33 35.0 −0.7± 0.3 4.7 ± 1.0 9.8 × 10−11
HC(O)NH2 7.0 × 1012 45 15.0 −0.7± 0.4 3.5 ± 0.6 2.5 × 10−11 (3)
CH3OCH3 2.7 × 1014 57 20.0 −0.5± 0.6 4.4 ± 1.3 1.3 × 10−9
(†)C2H5CN ≤ 9.3 × 1012 57 20.0 −0.5± 0.0 4.4 ± 0.0 ≤ 4.4 × 10−11 (2)
C2H3CN ≤ 9.2 × 1012 57 20.0 −0.5± 0.0 4.4 ± 0.0 ≤ 4.3 × 10−11 (1)
CH3OCHO 2.7 × 1014 57 20.0 −0.5± 0.5 4.0 ± 1.8 1.3 × 10−9
CH3COCH3 ≤ 3.0 × 1015 80 2.0 −0.7± 0.0 5.2 ± 0.0 ≤ 1.4 × 10−9
C2H5OH 2.5 × 1015 80 3.0 −0.8± 0.8 4.2 ± 1.3 1.8 × 10−9
CH3OH,υt = 0 2.0 × 1016 121 3.0 −0.8± 0.4 4.7 ± 1.1 1.4 × 10−8
(†)C2H5CN ≤ 2.3 × 1016 185 1.0 −0.7± 0.0 5.2 ± 0.0 ≤ 5.4 × 10−9 (2)
C2H3CN ≤ 1.0 × 1016 185 1.0 −0.7± 0.0 5.2 ± 0.0 ≤ 2.3 × 10−9 (1)
CH3CN 3.0 × 1015 185 1.0 −0.7± 0.6 5.2 ± 1.5 7.0 × 10−10
G335.58
CH3OCH3 3.0 × 1014 22 34.0 −0.2± 0.7 4.0 ± 0.7 1.7 × 10−9
HC(O)NH2 9.0 × 1012 23 17.0 −0.6± 0.3 4.6 ± 1.3 2.5 × 10−11
CH3CN 2.0 × 1013 25 39.0 −0.5± 0.2 5.0 ± 0.5 1.3 × 10−10
CH3OCHO 6.0 × 1014 28 25.0 −0.3± 0.3 3.9 ± 0.9 2.5 × 10−9
CH3OH,υt = 0 1.0 × 1015 29 40.0 −0.5± 0.1 4.5 ± 0.4 6.5 × 10−9
CH3CHO 8.7 × 1013 32 25.0 −0.4± 0.4 4.1 ± 0.9 3.6 × 10−10
CH3SH 5.0 × 1015 60 2.0 −0.6± 0.8 4.5 ± 0.6 1.6 × 10−9
(†)C2H5CN 4.3 × 1014 70 7.0 −0.7± 0.3 5.0 ± 0.8 4.9 × 10−10
C2H5OH 1.0 × 1016 80 3.0 −0.0± 0.6 3.9 ± 1.4 4.9 × 10−9
CH3COCH3 4.2 × 1016 85 1.0 −0.0± 1.3 4.3 ± 1.1 6.9 × 10−9
HC(O)NH2 1.1 × 1014 90 5.0 −0.7± 1.0 4.7 ± 1.7 9.0 × 10−11
CH3OCHO 3.0 × 1016 100 3.0 −0.3± 0.3 3.9 ± 0.8 1.5 × 10−8
CH3OCH3 1.0 × 1017 120 2.0 −0.2± 0.7 4.0 ± 0.7 3.3 × 10−8
C2H3CN 1.5 × 1016 148 1.0 −0.8± 0.6 4.7 ± 1.5 2.5 × 10−9 (1)
CH3OH,υt = 0 2.5 × 1016 150 5.0 −0.8± 0.3 5.3 ± 1.1 2.0 × 10−8
CH3OH,υt = 1 6.0 × 1016 200 5.0 −0.5± 0.2 4.4 ± 0.6 4.9 × 10−8
(†)C2H5CN 3.6 × 1016 223 1.0 −0.7± 0.4 4.7 ± 1.1 5.9 × 10−9
CH3CN 3.6 × 1015 260 2.0 − 0.5± 0.6 5.2 ± 1.0 1.2 × 10−9
G335.78
CH3OH,υt =0 5.0 × 1014 25 39.0 −1.0± 0.2 5.1 ± 0.5 4.1 × 10−9
CH3CN 1.2 × 1013 26 39.0 −0.8± 0.2 5.0 ± 0.9 9.8 × 10−11
(†)C2 H5CN ≤1.2 × 1013 26 39.0 −0.8± 0.0 5.0 ± 0.0 ≤9.8 × 10−11 (2)
C2H3CN ≤1.2 × 1013 26 39.0 −0.8± 0.0 5.0 ± 0.0 ≤9.8 × 10−11 (2)
CH3CHO 5.5 × 1013 27 23.0 −0.6± 0.5 4.4 ± 1.1 2.6 × 10−10
CH3OCH3 3.5 × 1014 46 15.0 −0.9± 1.0 5.5 ± 1.6 1.1 × 10−9
HC(O)NH2 ≤1.0 × 1013 46 15.0 −0.9± 0.0 5.5 ± 1.4 ≤3.1 × 10−11 (2)
CH3SH ≤1.0 × 1014 46 15.0 −0.9± 0.0 5.5 ± 1.4 ≤3.1 × 10−10 (2)
CH3OH, υt = 0 1.8 × 1016 130 4.0 −1.3± 0.5 6.4 ± 1.0 1.5 × 10−8
CH3CN 4.2 × 1015 220 1.0 −0.7± 0.7 5.7 ± 1.8 8.8 × 10−10
(†) C2H5CN ≤1.8 × 1016 220 1.0 −0.7± 0.0 5.7 ± 0.0 ≤3.8 × 10−9 (2)
C2H3CN ≤8.0 × 1015 220 1.0 −0.7± 0.0 5.7 ± 0.0 ≤1.7 × 10−9 (2)
G343.75
CH3OH, υt = 0 4.5 × 1014 31 39.0 −1.0± 0.2 5.1 ± 0.5 2.9 × 10−9
CH3CHO 5.0 × 1013 34 29.0 −0.6± 0.6 5.4 ± 1.5 2.4 × 10−10
CH3CN 1.5 × 1013 35 35.0 −0.8± 1.5 5.3 ± 0.5 8.8 × 10−11
CH3OCHO 5.5 × 1014 42 17.0 −0.4± 0.8 6.7 ± 1.4 1.6 × 10−9
HC(O)NH2 1.0×1014 52 6.0 −1.0± 0.9 6.0 ± 2.0 1.0 × 10−10
CH3SH 1.5 × 1014 70 13.0 −0.2± 0.4 5.8 ± 1.9 3.3 × 10−10
CH3OCH3 9.0 × 1015 80 5.0 −0.2± 0.5 4.8 ± 1.0 7.5 × 10−9
(†)C2H5CN 5.9 × 1015 110 2.0 −1.3± 0.7 6.9 ± 1.3 2.0 × 10−9
CH3OCHO 9.5 × 1015 112 3.0 −0.6± 0.9 6.3 ± 1.3 4.8 × 10−9
CH3OH, υt = 0 8.0 × 1015 130 9.0 −1.3± 0.5 6.4 ± 1.0 1.2 × 10−8
C2H3CN ≤ 1.0 × 1015 170 2.0 −0.7± 0.0 5.7 ± 0.0 ≤3.3 × 10−10 (2)
CH3OH. υt = 1 2.5 × 1017 195 2.0 −1.0± 0.8 7.0 ± 1.5 8.4 × 10−8
CH3CN 2.0 × 1015 200 2.0 −1.3± 0.6 6.6 ± 1.1 6.7 × 10−10

Notes.(†) The column densities of these molecules have been corrected by the vibrational factor to account for the contribution of torsionally or vibrationally excited states to the partition function. All parameters are calculated for the given Tex. The vibrational factors for C2H5CN are: 1.01 at 57 K, 1.04 at 70 K, 1.18 at 110 K, 1.78 at 185 K, and 2.28 at 185 K. (1) Upper limit is based on a 3σ noise level. (2): Upper limit is based on a tentative detection. We fixed the following parameters: size, excitation temperature, line width, and velocity offset. (3): We used the temperature and the size determined for CH3OCH3.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.