New data on two galaxies are consistent with black holes
DOI: 10.1063/1.2995138
How is energy supplied in the active centers of radio galaxies and quasars? This intriguing question lies at the heart of various overlapping and competing astrophysical theories, including those that propose the existence of a black hole. Now two separate sets of observations—of an apparent supermassive object at the center of galaxy M 87 and of a small narrow radio jet parallel to a much larger jet in NGC 6251—are being welcomed as a chance to test some of these ideas.