The Excitation of N2H+in Interstellar Molecular Clouds. II. Observations (original) (raw)

The Astrophysical Journal, 2007

Abstract

We present observations of the J=1-0, 2-1, and 3-2 rotational transitions of N2H+ and N2D+ toward a sample of prototypical dark clouds. The data have been interpreted using nonlocal radiative transfer models. For all sources previously studied through millimeter-continuum observations, we find a good agreement between the volume density estimated from our N2H+ data and that estimated from the dust

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