Table 2
HfS fit parameters at different positions of FeSt 1-457.
| A × τm a | vLSRb | Δv c | τmd | rms | Position | ||||
| (K) | (km s-1) | (km s-1) | (K) | (see Fig. 1c) | |||||
|
|
|||||||||
| 3.1 ± 0.6 | 5.785 ± 0.012 | 0.231 ± 0.019 | 1.4 ± 0.4 | 0.176 | 1 | ||||
| 2.5 ± 0.5 | 5.863 ± 0.014 | 0.277 ± 0.022 | 1.1 ± 0.4 | 0.166 | 2 | ||||
| 8.7 ± 1.1 | 5.752 ± 0.007 | 0.200 ± 0.009 | 4.0 ± 0.5 | 0.166 | 3 | ||||
| 3.5 ± 0.4 | 5.839 ± 0.008 | 0.220 ± 0.013 | 1.9 ± 0.3 | 0.124 | 4 | ||||
| 2.7 ± 0.4 | 5.755 ± 0.008 | 0.199 ± 0.014 | 1.1 ± 0.3 | 0.130 | 5 | ||||
| 2.2 ± 0.5 | 5.788 ± 0.014 | 0.210 ± 0.022 | 1.2 ± 0.5 | 0.156 | 6 | ||||
Notes.
A × τm, product of the amplitude (A = f [Jν(Tex)−Jν(Tbg)], where f is the filling factor, Jν(T) is the Planck function in units of temperature, Tex is the excitation temperature and Tbg is the cosmic microwave background temperature) times the optical depth of the main component.
τm, optical depth of the main component. (See Estalella 2016, for further details of the HfS fitting procedure.)
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