Accretion-ejection morphology of the microquasar SS 433 resolved at sub-au scale
Accretion-ejection morphology of the microquasar SS 433 resolved at sub-au scale
We present the first optical observation at sub-milliarcsecond (mas) scale of the microquasar SS 433 obtained with the GRAVITY instrument on the VLT interferometer. The 3.5 hour exposure reveals a rich K-band spectrum dominated by hydrogen Br$γ $ and \ion{He}{i} lines, as well as (red-shifted) emission lines coming from the …