All Figures

Figure 1: Sample of H2 lines detected toward HD 100546. The histogram shows the data. The final fit to the data is shown (thick line) together with the theoretical spectrum without convolution with the instrumental line spread function (thin line). This shows that the fitted lines are not saturated. In the selected sample, some lines are blended together. Consequently, a profile fitting is needed to use the information included in the data but which cannot be translated into an equivalent width.

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In the text

	Figure 2: Two H2 absorption lines detected over one emission line of the O  VI doublet toward HD 163296. Here the theoretical spectrum without convolution with the instrumental line spread function (thin line as in Fig. 1) shows that these H2 absorption lines are saturated.
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In the text

	Figure 3: Excitation diagram of the H2 lines detected toward HD 100546. The column densities of the rotational levels with are consistent with a single temperature of  K. This shows that the H2 volume density must be higher than the critical value of  cm-3.
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In the text

	Figure 4: Excitation diagram of the H2 lines detected toward HD 163296. The column densities of all the detected J-levels are consistent with a single temperature of  K. This shows that the H2 volume density must be higher than the critical value of  cm-3.
Open with DEXTER


In the text