Detection of CO and HCN in Pluto’s atmosphere with ALMA

  title={Detection of CO and HCN in Pluto’s atmosphere with ALMA},
  author={E. Lellouch and M. Gurwell and B. Butler and T. Fouchet and P. Lavvas and D. Strobel and B. Sicardy and A. Moullet and R. Moreno and D. Bockel'ee-Morvan and N. Biver and L. Young and D. Lis and J. Stansberry and A. Stern and H. Weaver and E. Young and X. Zhu and J. Boissier},
Abstract Observations of the Pluto-Charon system, acquired with the ALMA interferometer on June 12–13, 2015, have led to the detection of the CO(3-2) and HCN(4-3) rotational transitions from Pluto (including the hyperfine structure of HCN), providing a strong confirmation of the presence of CO, and the first observation of HCN in Pluto’s atmosphere. The CO and HCN lines probe Pluto’s atmosphere up to ∼450 km and ∼900 km altitude, respectively, with a large contribution due to limb emission. The… Expand

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