アブストラクト：
"During their co-evolution with their host galaxies, supermassive black holes (SMBHs) likely affect their surroundings through a form of self-regulating feedback. Recent high-resolution observations of the circumnuclear regions of nearby galaxies, including our own, often reveal ~10-100 pc holes at galaxy centres in the CO(2-1) or (3-2) lines. The origin of these CO holes are unknown, but their radii typically corresponds to the SMBH masses, suggesting that the SMBHs are the cause. We report some analysis on these circumnuclear holes to compare with direct measurements of SMBH masses, the method for which is developed by our team (WISDOM)."