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Table 9:

H2 volume densities and molecular column densities of H13CO+ and HN13C derived assuming extended emission for both the ambient and the precursor components of L1448-mm.
  H2 density (cm-3) Column density (cm-2)
Molecule Ambient Precursor Ambient Precursor
(0, 20)
H13CO+ $1.4\times10^5$ $3.5\times10^5$ $4.8\times10^{11}$ $4.0\times10^{11}$
HN13C $\la $ $ 1.9\times10^5$ $\la $ $ 9.2\times10^5$ $\la $ $6.4\times10^{11}$ $\la $ $1.5\times10^{11}$
(20, 0)
H13CO+ $\la $ $8.8\times10^4$ $1.8\times10^5$ $\la $ $5.1\times10^{11}$ $4.3\times10^{11}$
HN13C $\la $ $1.8\times10^5$ $\la $ $ 3.3\times10^5$ $\la $ $ 7.2\times10^{11}$ $\la $ $ 4.1\times10^{11}$
(-20, 0)
H13CO+ $\la $ $8.7\times10^4$ $7.1\times 10^4$ $\la $ $ 3.5\times10^{11}$ $6.4\times10^{11}$
HN13C $1.2\times10^5$ $\la $ $ 6.1\times10^5$ $1.4\times10^{12}$ $\la $ $ 2.0\times10^{11}$

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