Large column densities and [12CII] 158 μm self-absorption in Orion B
Abstract
We present a preliminary analysis of the self-absorbed [CII]-spectra observed with SOFIA/GREAT towards NGC 2024. Together with the detected [13CII] hyperfine satellites, the observed spectra require surprisingly high column densities of C+, both in the warm core and the foreground absorption component. Such high column densities are a challenge to explain with present state-of-the-art PDR models of the UV/molecular cloud interaction.
- Publication:
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Molecular Gas, Dust, and Star Formation in Galaxies
- Pub Date:
- March 2013
- DOI:
- 10.1017/S1743921313000380
- Bibcode:
- 2013IAUS..292...57S
- Keywords:
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- ISM: molecules;
- ISM: clouds;
- ISM: individual (Orion B)