Detection of D 2 H + in the Dense Interstellar Medium

The 692 GHz para ground-state line of D 2 H + has been detected at the Caltech Submillimeter Observatory toward the prestellar core 16293E. The derived D 2 H + abundance is comparable to that of H 2 D + , as determined by observations of the 372 GHz line of ortho-H 2 D + . This is an observational v... View More