Jet shoots out of crash among four galaxy clusters
Van Weeren et al., Bill Saxton/NRAO/AUI/NSF, NASA
BOSTON — A galactic pileup 5 billion light-years away is building a powerful particle accelerator, up to a million times as strong as Earth’s mightiest, the Large Hadron Collider. New images from the Very Large Array and Chandra X-ray Observatory, presented June 3 at the American Astronomical Society meeting, reveal a colossal collision driving a fountain of charged particles 2.5 million light-years into intergalactic space.
Galaxy clusters are the largest gravitationally bound structures in the universe, said Reinout van Weeren of the Harvard-Smithsonian Center for Astrophysics at a press conference. Astronomers think that large clusters, which house thousands of galaxies, build up over billions of years as smaller clusters collide.
The newly imaged jet sits at the heart of what van Weeren called “the most complex cluster collision known.” Four smaller