Free Access

Table 3

Probable values of the parameters involved in the OH modeling.

Parameter QC HVC LVCa

Rint (pc)b 55−73 65−80 65−80
Tdust (K) 95−120 90−105 ~90
τ 100 1−3 1.5−2.0 ≲1
Rout/Rint ≲1.5 ~1.5−2
vint (km s-1) 1700 ~300
vout (km s-1) 100 ~200
NOH (1017 cm-2) 5−16c 1.5−3 ~0.3
pf/Routd 1 ~0.8 ~1

Notes. Parameters for the LEC (low-excitation component) are not well constrained (see Sect. 3.4) and are omitted.


Uncertain parameters from the present data.


For f = 1.


Column density per unit of τ50 (G-A12).


pf/Rout = 1 is a fully spherical model, while pf/Rout < 1 simulates collimation in the direction of the observer.

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.