Table 4
Kinematic parameters and physical conditions of the Orion-KL spatial components.
| Parameter | Extended ridge | Compact ridge | Plateau | Hot core |
| (ER) | (CR) | (P) | (HC) | |
|
|
||||
| Source diameter (′′) | ≃120 (120) | 5−15 (15) | 20−30 (30) | 5−10 (10) |
| Offset (from IRc2) (′′) | 0 (0) | 7 (7) | 0 (0) | 2−3 (2) |
| n(H2) (cm-3) | ≃105 | ≃106 | ≃106 | 107–108 |
| Tk (K) | ≃60 (60) | 80−150 (110) | 100−150 (125) | 150−300 (225) |
| ΔvFWHM (km s-1) | ≃4 (4) | 3−5 (4) | ≃25 (25) | 5−15 (10) |
| vLSR (km s-1) | 8−10 (8) | 7−9 (7.5) | 6−11 (9) | 3−6 (5.5) |
Notes. Parameters compiled from different authors: Blake et al. (1987); Schilke et al. (2001); Persson et al. (2007); Tercero et al. (2010); Neill et al. (2013). The values between parenthesis are those adopted for the model of HCOOCH3νt = 1 and 13C-HCOOCH3νt = 0.
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