Survey of ortho-H$\mathsf{_{2}}$D$\mathsf{^{+}}$ (1$\mathsf{_{1,0}}$–1$\mathsf{_{1,1}}$) in dense cloud cores

Aims. We present a survey of the ortho- (1-1) line toward a sample of 10 starless cores and 6 protostellar cores, carried out at the Caltech Submillimeter Observatory. The high diagnostic power of this line is revealed for the study of the chemistry, and the evolutionary and dynamical status of low-... View More