Nitrogen and hydrogen fractionation in high-mass star forming cores from observations of HCN and HNC

L. Colzi, F. Fontani, P. Caselli +3

The ratio between the two stable isotopes of nitrogen, ${}^{14}$N and ${}^{15}$N, is well measured in the terrestrial atmosphere ($\sim 272$), and in the pre-Solar nebula ($\sim 441$).…