Supermassive black holes (SMBH) occupy the center of galaxies, with masses ranging from one million to 10 billion solar masses.
Some SMBHs are in a bright phase called active galactic nuclei (AGN).
Tohoku University's Kohei Ichikawa and his research group may have discovered an AGN towards the end of its life span by accident after catching an AGN signal from the Arp 187 galaxy.
Through observing the radio images in the galaxy using two astronomy observatories—the Atacama Large Millimeter/submillimeter Array (ALMA) and the Very Large Array (VLA) - they found a jet lobe, a hallmark sign of AGN.
Source
Some SMBHs are in a bright phase called active galactic nuclei (AGN).
Tohoku University's Kohei Ichikawa and his research group may have discovered an AGN towards the end of its life span by accident after catching an AGN signal from the Arp 187 galaxy.
Through observing the radio images in the galaxy using two astronomy observatories—the Atacama Large Millimeter/submillimeter Array (ALMA) and the Very Large Array (VLA) - they found a jet lobe, a hallmark sign of AGN.
Source