SIMBAD references

Context. The Odin satellite is now into its sixteenth year of operation, much surpassing its design life of two years. One of the sources which Odin has observed in great detail is the Sgr A complex in the centre of the Milky Way.
Aims. To study the presence of NH₃ in the Galactic centre and spiral arms.
Methods. Recently, Odin has made complementary observations of the 572GHz NH₃ line towards the Sgr A +50km/s cloud and circumnuclear disk (CND).
Results. Significant NH₃ emission has been observed in both the +50km/s cloud and the CND. Clear NH₃ absorption has also been detected in many of the spiral arm features along the line of sight from the Sun to the core of our Galaxy.
Conclusions. The very large velocity width (80km/s) of the NH₃ emission associated with the shock region in the southwestern part of the CND may suggest a formation/desorption scenario similar to that of gas-phase H₂O in shocks/outflows.