Table 1
NH3 line parameters.
| (J,K) | I a | S a | V a | ΔV1/2a | N(J,K)b |
| (Jykms-1) | (mJy) | (kms-1) | (kms-1) | (1013 cm-2) | |
|
|
|||||
| (1,1) | 0.89( 0.07) | 3.26( 0.13) | −30(6) | 274(17) | 2.52(0.24) |
| (2,2) | 0.79( 0.06) | 3.10( 0.14) | −37(6) | 254(19) | 1.67(0.19) |
| (3,3) | 1.19( 0.10) | 5.40( 0.14) | −37(3) | 220( 8) | 2.22(0.13) |
| (4,4) | 0.55( 0.05) | 3.72( 0.14) | −2(3) | 149( 7) | 0.96(0.07) |
| (6,6) | 0.28( 0.04) | 1.88( 0.23) | −56(9) | 147(27) | 0.43(0.12) |
| (5,5) | 0.53 | ||||
| (0,0) | 2.55 | ||||
| N total | 10.9(2.3) | ||||
Notes.
The values are derived from Gaussian fits to the spectra. Given velocities are relative to a heliocentric velocity of cz=1137 kms-1.
The column density for the (5,5) state is extrapolated from the (2,2) and (4,4) states using Trot = 119 K, while the value for the (0,0) state is extrapolated from the (3,3) state by adopting Trot = 44 K. The total column density, Ntotal, includes the populations of the levels from (0,0) to (6,6). Because relative calibration is excellent up to at least the (4,4) transition, the errors given in parenthesis refer exclusively to the Gaussian fits. For the cumulative column density, Ntotal, however, the given error accounts for the absolute calibration uncertainty (Sect. 2).
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.