“I was really excited because the observed gas showed obvious orbital motions, which strongly suggest an invisible massive object lurking.”
Similar clouds of molecular gas have previously been observed, but they were concluded to have been a result of collisions between supernova clouds.
The difference between them and the new invisible object, dubbed HCN–0.009–0.044, is that the current one shows no evidence has been found suggesting there is an expansion pattern associated with supernova cloud collisions.