DETECTION OF THE AMMONIUM ION IN SPACE

@article{Cernicharo2013DETECTIONOT,
  title={DETECTION OF THE AMMONIUM ION IN SPACE},
  author={Jos{\'e} Cernicharo and Bel{\'e}n Tercero and Asunci{\'o}n Fuente and Jos{\'e} L. Dom{\'e}nech and Maite Cueto and Esther Carrasco and V{\'i}ctor J. Herrero and Isabel Tanarro and N. Marcelino and {\`E}velyne Roueff and Maryvonne Gerin and Justin Pearson},
  journal={The Astrophysical Journal Letters},
  year={2013},
  volume={771}
}
We report on the detection of a narrow feature at 262816.73 MHz toward Orion and the cold prestellar core B1-bS which we attribute to the 10–00 line of the deuterated ammonium ion, NH3D+. The observations were performed with the IRAM 30 m radio telescope. The carrier has to be a light molecular species as it is the only feature detected over 3.6 GHz of bandwidth. The hyperfine structure is not resolved, indicating a very low value for the electric quadrupolar coupling constant of nitrogen which… 

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