Variations of the HCO${}^{+}$, HCN, HNC, N${}_2$H${}^{+}$ and NH${}_3$ deuterium fractionation in high-mass star-forming regions

A. G. Pazukhin, I. I. Zinchenko, E. A. Trofimova +2

We use spectra and maps of the $J=1-0$ and $J=2-1$ DCO${}^{+}$, DCN, DNC, ${\mathrm{N}}_2{\mathrm{D}}^{+}$ lines and $1_{11}-1_{01}$ ortho- and para-NH${}_2$D lines, obtained with the IRAM-30m telescope…