Resonant line transfer in a fog: using Lyman-alpha to probe tiny structures in atomic gas

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Table 2

Overview of the model parameters.

Symbol	Description	Considered values

B	Half-height of slab	50 pc
r _cl	Clump radius	{10^-3, 10^-2} pc
f _c ^a	Covering factor	[0, 2000]
T	Temperature	10⁴K
N _HI,cl ^b	Clump HI column density	[10¹², 10²²] cm^-2
σ _cl	Clumps’ velocities standard deviation	[0, 500] km s^-1
τ _d,cl ^b	Clump (absorbing) dust optical depth	[10^-4, 1]
v _max	Maximum clump outflow velocity	[0, 5000] km s^-1

F _V	Volume filling factor	[0, 0.6]
N _HI,total ^a	HI column density of slab	[10¹¹, 10²⁶] cm^-2
n_HI,cl	HI number density in clumps	[10^-5, 10⁶] cm^-3
τ_0,cl ^b	Line center optical depth of clump	[0.05, 10⁹]
τ_{0, total} ^a	Total line center optical depth	[10^-3, 10¹³]
τ_{d, total} ^a	Total (absorbing) dust optical depth	[0, 10³]

Notes. Above and below the horizontal line are the free and dependent parameters, respectively.

^(a)

From emitting plane to boundary of the slab, i.e., per B.

^(b)

From center to boundary of a clump, i.e., per r_cl.

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