Molecular Abundances in the Core of the High-Latitude Cloud MBM12

Astronomy and Astrophysics – Astronomy

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Scientific paper

We observed the molecular transitions of 12CO(1-0), 13CO(1-0), C18O(1-0), CS(2-1), HCO+(1-0), and HCN(1-0) toward the high-latitude molecular cloud MBM12. We derived total H2 column densities for the two velocity components using the optically thin C18O transition. Molecular abundances have been derived for the observed species at the core of this cloud, which appear to be less than an order of magnitude in fractional abundances relative to H2, compared to typical cold dark clouds.

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