The resulting debris is absorbed into the disk of the more massive host galaxy before it approaches the center. (sciencedaily.com)
It is also located in a much smaller and younger host galaxy, and is only detected during a single, several - hour burst. (sciencedaily.com)
They used radio telescopes to study four host galaxies bearing black holes from about 12 billion years ago, when the universe was only about a billion years old. (blogs.scientificamerican.com)