All Tables

Table 1: The observed sample. IRAS16293-2422, which has been studied elsewhere (see text) is included for comparison.
Table 2: Integrated fluxes of H₂CO lines in $T_{\rm mb} ~ {\rm d}V$ units. Upper limits are given as 2 $\sigma$ . The "-'' symbol indicates lack of the relevant observation.
Table 3: Integrated fluxes of H₂¹³CO lines in $T_{\rm mb} ~ {\rm d}V$ units. Upper limits are given as 2 $\sigma$ . The "-'' symbol indicates lack of the relevant observation.
Table 4: H₂CO lines opacities derived from the H₂¹³CO observations.
Table 5: Results of the rotational diagram and LVG analysis.
Table 6: Formaldehyde abundances as derived from the envelope model in the outer parts of the envelope ( $X_{\rm out}$ ) and the inner parts of the envelope ( $X_{\rm in}$ ). The table also includes the radius where the dust temperature is 100 K and 50 K, and the density at the radius where the dust temperature is 100 K.
Table A.1: L1448-N best fit parameters from the DUSTY modelling and derived physical parameters.
Table B.1: Predicted line fluxes of selected o-H₂CO transitions for a constant abundance $X_{\rm out}$ across the enveloppe.
Table B.2: Predicted line fluxes of selected o-H₂CO transitions for an abundance $X_{\rm out}$ in the outer enveloppe, increasing to $X_{\rm in}$ at the radius where $T_{\rm dust} \ge 100$ K.