Volume 521, October 2010
Herschel/HIFI: first science highlights
Article Number L45
Number of page(s) 6
Section Letters
Published online 01 October 2010

Online Material

Appendix A: Figures

\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.

Open with DEXTER

\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.

Open with DEXTER

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.