Although 100,000 single quasars and a few binary quasars are known, a triple quasar has never been discovered. Until now.
Astronomers announced at the American Astronomical Society meeting in Seattle this week that they’ve turned up just such a triple quasar using the powerful W.M Keck Observatory. The three galaxies (and their actively feeding black holes) are located about 10.5 billion years away, which also means that we’re seeing them 10.5 billion years ago; a time when galaxies were regularly interacting and colliding.
These early galactic interactions could play an important role in regulating galaxy growth, and help explain how supermassive black holes and their galaxies seem to grow in unison.
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