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Clowe, Santana Probe First Signs of Self-interacting Dark Matter

This image from the NASA/ESA Hubble Space Telescope shows the rich galaxy cluster Abell 3827. The strange blue structures surrounding the central galaxies are gravitationally lensed views of a much more distant galaxy behind the cluster. Observations of the central four merging galaxies have provided hints that the dark matter around one of the galaxies is not moving with the galaxy itself, possibly implying dark matter-dark matter interactions of an unknown nature are occurring. Credit:
ESO

For the first time, dark matter may have been observed interacting with other dark matter in a way other than through the force of gravity. Observations of colliding galaxies made with ESO’s Very Large Telescope and the NASA/ESA Hubble Space Telescope have picked up the first intriguing hints about the […]

Sky and Telescope Quotes Clowe on New Look at Dark Matter, Bullet Cluster

Sky and Telescope quotes Dr. Douglas Clowe, Associate Professor of Physics & Astronomy, in an article on “How Slippery is Dark Matter?” “Dozens of galaxy cluster collisions confirm that dark matter particles probably slip right past each other within messy cluster mergers,” writes Monica Young. “The existence of dark matter […]