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Table 7:

H2 densities and molecular column densities of H13CO+ and HN13C derived assuming extended emission and a temperature of 21 K for all molecules, for the precursor component of L1448-mm.
  H2 density (cm-3) Column density (cm-2)
(0, 0)
H13CO+ $5.0\times10^6$ $9.3\times10^{11}$
SiO $1.6\times10^6$ $1.2\times10^{11}$
HN13C $\la $ $ 1.3\times10^6$ $3.7\times10^{11}$
H13CN $\la $ $4.8\times10^6$ $3.3\times10^{11}$
(0, -10)
H13CO+ $3.7\times10^7$ $2.6\times10^{11}$
SiO $3.5\times10^6$ $1.4\times10^{11}$
HN13C $\la $ $ 7.1\times10^5$ $6.8\times10^{11}$
H13CN $\la $ $3.6\times10^6$ $4.2\times10^{11}$

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