Ravi et al. have investigated the claim that the high-velocity compact molecular cloud CO-0.40-0.22 contains an intermediate mass black hole. They present a collation of radio and infrared data, with Australia Telescope Compact Array constraints on the radio spectrum, and the detection of a mid-infrared counterpart, bothin being in tension with intermediate mass black hole models for CO-0.40-0.22. They do however, find some support for a protostellar-disc scenario for the source, and hypothesize that it is the remnant of a high-velocity cloud that has plunged into the Milky Way from the Galactic halo.

The images above were obtained with the ATCA, Spitzer/IRAC and VISTA and are displayed in Galactic coordinates centred on the ALMA position of CO-0.40-0.22. The non-detection with the ATCA placed important constraints on the spectrum of the putative intermediate mass black hole. Details are published in the paper , published in Monthly Notices of the Royal Astronomical Society .