Publication Abstracts

Guelin et al. 1977

Guelin, M., W.D. Langer, R.L. Snell, and H.A. Wootten, 1977: Observations of DCO+: The electron abundance in dark clouds. Astrophys. J., 217, L165-L168, doi:10.1086/182562.

The J = 2-1 rotational line of DCO+ has been definitely detected in five molecular clouds, including three dark clouds, L63, L134, and L134 N, and marginally detected in four others. The DCO+ emission has been mapped in L134 N and extends over a region of 3'. The DCO+/HCO+ abundance ratio found at the centers of dark clouds is large and implies a fractional electron abundance of less than one hundred millionth. This low electron density sets constraints on the metals and possibly CO as well as on the hydrogen density.

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BibTeX Citation

  author={Guelin, M. and Langer, W. D. and Snell, R. L. and Wootten, H. A.},
  title={Observations of DCO+: The electron abundance in dark clouds},
  journal={Astrophysical Journal},

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RIS Citation

ID  - gu04000r
AU  - Guelin, M.
AU  - Langer, W. D.
AU  - Snell, R. L.
AU  - Wootten, H. A.
PY  - 1977
TI  - Observations of DCO+: The electron abundance in dark clouds
JA  - Astrophys. J.
JO  - Astrophysical Journal
VL  - 217
SP  - L165
EP  - L168
DO  - 10.1086/182562
ER  -

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