The magnetic precursor of L1448-mm: excitation differences between ion and neutral fluids

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Table 6:

Optical depths of the HN¹³C $J=3\rightarrow 2$ line toward L1448-mm (0, 0) and (0, -10) derived from different isotopologue ratios for the ambient (amb.) and the precursor (prec.) components, and for different source morphologies.
(0, 0)
Ratio used	Component	$T_{\rm B,rare}/T_{\rm B,32}$	$\tau_{32}$ (HN¹³C)	$T_{\rm B,rare}/T_{\rm B,32}$	$\tau_{32}$ (HN¹³C)
		Source size $5\hbox{$^{\prime\prime}$ }$		Extended source
H¹⁵NC/HN¹³C	Amb.	$\la$ 0.74	$\la$ 7.6	$\la$ 0.3	$\la$ 1.1
	Prec.	$\sim1.1$	...	$\sim$ 0.4	$\sim$ 2.5
H¹⁵N¹³C/HN¹³C	Amb.	$\la$ 1.6	...	$\la$ 0.6	$\la$ 320
	Prec.	$\sim$ 2.3	...	$\sim$ 0.8	$\sim$ 700
(0, -10)
Ratio used	Component	$T_{\rm B,rare}/T_{\rm B,32}$	$\tau_{32}$ (HN¹³C)	$T_{\rm B,rare}/T_{\rm B,32}$	$\tau_{32}$ (HN¹³C)
		Source size $5\hbox{$^{\prime\prime}$ }$		Extended source
H¹⁵N¹³C/HN¹³C	Amb.	$\sim$ 2.2	...	$\sim$ 0.8	$\sim$ 610
	Prec.	$\sim$ 2.2	...	$\sim$ 0.8	$\sim$ 610

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