Statistical nuclear spin ratios of deuterated ammonia in the pre-stellar core L1544

Jorma Harju, Paola Caselli, Olli Sipilae +6

We determined the ortho/para (o/p) ratios of NH2D and NHD2 in the archetypical pre-stellar core L1544. The core was observed in the two lowest rotational lines of ortho- and para-N…