| Issue |
A&A
Volume 558, October 2013
|
|
|---|---|---|
| Article Number | A58 | |
| Number of page(s) | 13 | |
| Section | Interstellar and circumstellar matter | |
| DOI | https://doi.org/10.1051/0004-6361/201321944 | |
| Published online | 03 October 2013 | |
Online material
Appendix A: HIFI O2 spectrum
 |
Fig. A.1
Spectrum of Fig. 2 magnified over certain velocity ranges. In panel c) the O2 33–12 transition is shown. Identifications refer to the 7.0 km s-1 component. |
| Open with DEXTER | |
Overview of the other lines observed in the same spectrum.
Appendix B: RADEX calculations for C18O
The integrated intensity ratio of C18O 3–2/1–0 is equal to 0.74 for the 8.0 km s-1 component. This ratio can be analysed using the RADEX non-LTE excitation and radiative transfer program (van der Tak et al. 2007) to constrain the physical parameters. Figure B.1 presents the integrated intensity ratios as function of temperature and density, obtained for optically thin conditions. The observed ratio is indicated in dash-dotted lines.
 |
Fig. B.1
Left: schematic cartoon showing the scenario of O2 emission originating from the surrounding cloud. Right: integrated intensity ratios calculated with RADEX, as function of temperature and density, for a C18O column density of 5 × 1014 cm-2 (optically thin conditions). The C18O 3–2/1–0 ratio is relevant for the surrounding NGC 1333 cloud, which is traced by the 8.0 km s-1 component. Dash-dotted lines indicate the observed ratio of C18O 3–2/1–0 = 0.74 for the VLSR = 8.0 km s-1 component. |
| Open with DEXTER | |
© ESO, 2013
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.