Issue
A&A
Volume 521, October 2010
Herschel/HIFI: first science highlights
Article Number L45
Number of page(s) 6
Section Letters
DOI https://doi.org/10.1051/0004-6361/201015105
Published online 01 October 2010

Online Material

Appendix A: Figures

\begin{figure}
\par\includegraphics[angle=90,width=13cm,clip]{15105Fig4.eps}
\end{figure} Figure A.1:

A pseudo-time-dependent model with constant physical conditions taking into account both gas-phase and grain surface chemistry. For all lines: $T_{\rm dust}$ = 10 K and the solid/dashed lines show $T_{\rm gas}$ = 30 and 50 K, respectively. The black thin lines show the observed abundances, and the dashed black line the NH+ upper limit. Black line: gas phase & grain surface chemistry using $A_{\rm V}$ = 3, $n_{\rm H}$ = 5000  cm-3. Red line: gas phase & grain surface chemistry using $A_{\rm V}$ = 2, $n_{\rm H}$ = 500  cm-3. Grey line: only gas phase chemistry using $A_{\rm V}$ = 3, $n_{\rm H}$ = 5000  cm-3. Blue line: only gas phase chemistry using $A_{\rm V}$ = 2, $n_{\rm H}$ = 500  cm-3.

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\begin{figure}
\includegraphics[angle=-90,width=12.5cm,clip]{15105Fig5.eps}
\end{figure} Figure A.2:

The cloud depth-dependent Meudon PDR model for pure gas-phase chemistry using $n_{\rm H}$ = 1000  cm-3, $\zeta $ = 10-17-10-15 s-1, and a UV-field of 10 times the interstellar radiation field in Draine units ($\sim $G0). The left panel shows the relative abundances of NH/NH2 and NH2/NH3, and the right panel show the absolute abundances.

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