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

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Table 3:

Observed parameters of the $J=2\to 1$ line of SiO, and of the $J=3\to 2$ and $J=1\to 0$ transitions of H¹³CO⁺ and HN¹³C toward L1448-mm (0, 20), (20, 0) and (-20, 0).
	(0, 20)			(20, 0)			(-20, 0)
	$V_{\rm LSR}$	$\Delta v$	$T_{\rm A}^*$	$V_{\rm LSR}$	$\Delta v$	$T_{\rm A}^*$	$V_{\rm LSR}$	$\Delta v$	$T_{\rm A}^*$
Line	(km s^-1)	(km s^-1)	(K)	(km s^-1)	(km s^-1)	(K)	(km s^-1)	(km s^-1)	(K)
SiO( $2\to1$ )^a	$\sim$ 4.7	...	$\la$ 0.027^b	$\sim$ 4.7	...	$\la$ 0.030	$\sim$ 4.7	...	$\la$ 0.036
	$\sim$ 5.2	...	$\la$ 0.027	5.07(6)	0.5(1)	0.04(1)	5.29(4)	0.51(7)	0.06(1)
H¹³CO⁺( $1\to 0$ )^a	4.597(3)	0.625(7)	0.75(2)	4.645(4)	0.590(9)	0.74(2)	4.606(3)	0.87(2)	0.49(3)
	5.126(0)	0.82(1)	0.57(2)	5.254(0)	0.89(1)	0.68(2)	5.318(1)	0.72(1)	0.85(3)
H¹³CO⁺( $3\to 2$ )	4.5(1)	0.5(3)	0.20(6)	$\sim$ 4.7	...	$\la$ 0.14	$\sim$ 4.7	...	$\la$ 0.09
	5.33(7)	0.7(2)	0.36(5)	5.2(1)	1.0(3)	0.22(5)	5.3(2)	0.4(2)	0.14(3)
HN¹³C( $1\to 0$ )^a	4.625(6)	0.80(1)	0.52(1)	4.6(1)	0.8(1)	0.57(1)	4.89(1)	0.86(2)	0.84(1)
	5.224(2)	0.80(5)	0.15(1)	5.2(1)	0.9(1)	0.40(1)	5.58(4)	0.63(6)	0.21(1)
HN¹³C( $3\to 2$ )	$\sim$ 4.7	...	$\la$ 0.07	$\sim$ 4.7	...	$\la$ 0.075	4.5(2)	0.7(2)	0.09(2)
	$\sim$ 5.2	...	$\la$ 0.07	$\sim$ 5.2	...	$\la$ 0.075	$\sim$ 5.2	...	$\la$ 0.07

Notes. ^(a) These molecular line transitions were taken from JS04. ^(b) The upper limits of the line intensities correspond to the $3\sigma$ noise level.

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